nabertherm - técnologia dos processos térmicos

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Thermal Process Technology

Furnaces and Heat Treatment Plants for

Annealing, Hardening, TemperingForming, Preheating, ForgingConditioning, DryingHeat CleaningVacuum Technology, Pyrolysis, BrazingMIMSurface FinishingPlastics, Rubber, SiliconeFiber Composites, GFRP, CFRPMedtechAMS 2750 E, NADCAP, CQI-9Energy Efficiency Technology Made

inGermany

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Made in GermanyNabertherm with 350 employees worldwide have been developing and producing industrial furnaces for many different applications for over 60 years. As a manufacturer, Nabertherm offers the widest and deepest range of furnaces worldwide. 150,000 satisfied customers in more than 100 countries offer proof of our commitment to excellent design, quality and cost efficiency. Short delivery times are ensured due to our complete inhouse production and our wide variety of standard furnaces.

Setting Standards in Quality and ReliabilityNabertherm does not only offer the widest range of standard furnaces. Professional engineering in combination with inhouse manufactoring provide for individual project planning and construction of tailor-made thermal process plants with material handling and charging systems. Complete thermal processes are realized by customized system solutions.

Innovative Nabertherm control technology provides for precise control as well as full documentation and remote monitoring of your processes. Our engineers apply state-of-the-art technology to improve the temperature uniformity, energy efficiency, reliability and durability of our systems with the goal of enhancing your competitive edge.

Global Sales and Service Network – Close to youCentralized engineering and manufacturing and decentralized sales and service define our strategy to live up to your needs. Long term sales and distribution partners in all important world markets ensure individual on-site customer service and consultation. There are various reference customers in your neighborhood who have similar furnaces or plants.

Large Customer Test CenterWhat furnace is the right choice for this specific process? This question cannot always be answered easily. Therefore, we have set up our modern test center which is unique in respect to size and variety. A representative number of furnaces is available for tests for our customers.

Customer Service and Spare PartsOur professional service engineers are available for you world-wide. Due to our complete inhouse production, we can despatch most spare parts from stock over night or produce with short delivery time.

Experience in Many Fields of Thermal ProcessingIn addition to furnaces for thermal process technology, Nabertherm offers a wide range of standard furnaces and plants for many other thermal processing applications. The modular design of our products provides for customized solutions to your individual needs without expensive modifications.

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Table of Contents Page

Which Furnace for Which Process? ....................................................................................................... 4

Brazing, Forming, Plastics ................................................................................................................... 8

Retort FurnacesHot-wall retort furnaces up to 1100 °C .....................................................................................................10Cold-wall retort furnaces up to 2400 °C ...................................................................................................14Pit-type cold-wall retort furnaces up to 2400 °C or up to 3000 °C ............................................................... 18Lift-bottom-retort furnace up to 2400 °C for production .............................................................................19

Air Circulation FurnacesAir circulation chamber furnaces < 675 liters, electrically heated ................................................................ 20Air circulation chamber furnaces > 560 liters, electrically heated or gas-fired .............................................. 22Chamber dryer, electrically heated or gas-fired ........................................................................................ 26Ovens, also with safety technology according to EN 1539, electrically heated .............................................. 28Air circulation chamber furnaces/ovens with safety technology for solvent-containing charges according to EN 1539 or NFPA 86 ....................................................................................................... 30Clean room solutions ............................................................................................................................31Chamber furnaces for heat cleaning, gas-fired with integrated thermal afterburner ....................................... 32Air circulation pit-type furnaces, electrically heated .................................................................................. 33Pit-type and top-loading furnaces with or without air circulation, electrically heated or gas-fired ..................... 35Air circulation bogie hearth furnaces, electrically heated or gas-fired .......................................................... 36

Bogie Hearth FurnacesBogie hearth furnaces, electrically heated .............................................................................................. 38Bogie hearth furnaces, gas-fired ............................................................................................................41

Chamber FurnacesChamber furnaces, also for heat cleaning, gas-fired ................................................................................. 42Chamber furnaces, electrically heated .................................................................................................... 43

Lift-Top Furnaces, Electrically Heated ................................................................................................ 46

Charging Devices and Accessories for Chamber and Bogie Hearth Furnaces ..................................... 48

Quench Tanks ..................................................................................................................................... 49

Protective Gas and Carburization Systems for Annealing and Hardening ............................................ 50

Salt-Bath Furnaces for Heat Treatment of Steel or Light Metals, Electrically or Gas-Fired ............. 52

Martempering Furnaces using Neutral Salts, Electrically Heated ....................................................... 53

Furnaces for Continuous ProcessesRotary hearth furnaces up to 1300 °C with and without air circulation, electrically hated or gas-fired ................ 54Continuous furnaces, electrically heated or gas-fired ................................................................................ 56Wire and strand annealing furnaces ....................................................................................................... 58

Energy Efficiency Technology ............................................................................................................. 59

Tempering Plants for Steel and NE-Metals ......................................................................................... 60

Temperature Uniformity and System Accuracy .................................................................................... 64

AMS 2750 E, NADCAP, CQI-9 ............................................................................................................. 65

Process Control and Documentation .................................................................................................. 68

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Which Furnace for Which Process?

NR 200/11 H2 for operation with hydrogen see page 10Annealing furnace with electro-hydraulic lift door on transportable base for preheating of large steel sheets for the automotive industry see page 44

Salt-bath furnace TS 40/30 with exhaust gas collection at crucible rim see page 52

Water quench tank with powerful water-circulation

Hardening, Annealing

in Air

Continuous furnaces

page 56

Rotary hearth furnaces

page 54

Lift-top furnaces

page 46

Chamber furnaces

page 43/44

Chamber furnaces gas-firedpage 42

Bogie hearth furnaces gas-fired,page 41

Bogie hearth furnaces

page 38

Air circulation pit-type furnacespage 34

Pit-type and top-loading furnacespage 35


Continuous furnaces

page 56


page 54

Lift-top furnaces

page 46

Chamber furnaces

page 43/44

Bogie hearth furnacesgas-firedpage 41


page 38

Preheating for Forging

� Press Hardening � Heating of sheet metals � Preheating of molds

� Ageing � Austempering � Diffusion annealing � Pack hardening � Recovery annealing � Coarse grain annealing

� Hardening � Solution annealing � Annealing � Recrystallization annealing � Stress-relieving � Soft annealing

in Salt Bathunder Protective Gases, Reaction Gases or in Vacuum


page 54

Lift-top furnaces with annealing box

page 46

Chamber furnaces with annealing box

page 43

Bogie hearth furnaces with annealing box

page 38

Cold-wall retort furnaces

page 14 - 19

Hot-wall retort furnaces

page 10 - 13

Salt-bath furnaces

page 52

Wire annealing furnaces

page 58

Strand annealing furnaces

page 58

Quenching

Water quench tanks

page 60 - 63

Quench tanks

page 49

�Water � Air � Oil � Polymer

4

Manual heat treatment system for hardening of steel rods see page 62/63

Tempering, Annealing

� Tempering � Precipitation annealing � Ageing � Recovery annealing

in Air

� Solution annealing � Preheating � Reduced hydrogen annealing

Pit-type and top-loading furnacespage 35

Air circulation bogie hearth furnaces

page 36

Air circulation chamber furnaces with cleanroom

technology, page 31

Air circulation chamber furnaces < 675 liters

page 20

Air circulation chamber furnaces > 560 liters

page 22

Chamber dryers

page 26

Continuous furnaces

page 56


page 54

Air circulation pit-type furnaces

page 33/34

Continuous furnaces

page 56


page 54

Air circulation pit-type furnaces with annealing

box, page 33

Air circulation bogie hearth furnaces with

annealing box, page 36

Air circulation chamber furnaces with annealing

box, page 31


box, page 20


page 10 - 13

Martempering furnaces

page 53

Heat Treatment Systems

� Solution annealing � Quenching � Artificial ageing

Manual heat treatment systems

page 62/63

Fully automatic tempering systems

page 60/61

in Salt Bathunder Protective Gases, Reaction Gases or in Vacuum

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Brazing/Soldering

� Soft soldering � Brazing � High-temperature brazing

under Protective Gases

� Dip brazing of steel � Dip brazing of aluminum

in Vacuumin Salt Bath

Chamber furnaces with annealing box,

page 43


box, page 20


page 14 - 19


page 10 - 13

Salt-bath furnaces

page 52

Curing, Tempering, Drying

� Composites � Molds � Adhesive � Plastics � Lacquers � PTFE

Ovens

page 28

Air circulation chamber furnaces page 20

Chamber dryers

page 26


page 14 - 19


page 10 - 13

� Silicone � Surface Drying � Preheating � Vulcanizing � Conditioning

Solvent Based Water Based

Which Furnace for Which Process?

Chamber dryers

page 26

Air circulation chamber furnaces EN 1539

page 30


page 10 - 13


page 54

Air circulation pit-type furnaces

page 33/34

Air circulation bogie hearth furnaces

page 36

Continuous furnaces

page 56

Brazing in a gas-supply box VHT 500/22-GR H2 with graphite insulation and heating see page 14

6

Blueing of drills in water steam atmosphere in a furnace of the NRA range see page 12

Surface TreatmentThermal/Thermo-Chemical Processes

� Carburizing � Blueing (e.g. with water steam) � Nitriding/nitrocarborizing � Oxidizing

in Salt Bath

� Deoxidizing under hydrogen � Heat cleaning � Pyrolysis

in Powdersunder Protective Gases, Reaction Gases

Salt-bath furnaces

page 52

Overview annealing boxes

page 50

Chamber furnaces with annealing box

page 43

Bogie hearth furnaces with annealing box

page 38

Air circulation bogie hearth furnaces with

annealing box, page 36


box, page 20


page 10 - 13

Sintering & Debinding

� Debinding � MIM � CIM � Sintering

Cold-wall retort furnaces,

page 14 - 19

Hot-wall retort furnaces,

page 10 - 13

under Protective Gases, Reaction Gases or in Vacuum

Chamber furnaces

page 43/44


Bogie hearth furnacesgas-firedpage 41


page 38

Air circulation chamber furnacespage 20


page 14 - 19

Overview annealing boxes

page 50

Lift-top furnaces

page 46


page 14 - 19


page 10 - 13

Retort furnaces for catalytic debinding, see

separate catalog:

Sintering of MIM titan parts in a VHT furnace

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Brazing, Forming, Plastics

The furnaces shown in this catalog can be used for various heat treatment processes. Nabertherm has developed interesting solutions for the processes described below as examples:

BrazingIn general, when speaking of brazing we have to distinguish between soft-soldering, brazing and high-temperature brazing. This involves a thermal process for forming substance-to-substance bonds and material coatings during which a liquid phase is generated by the melting of the solder. Based on their melting temperatures, the solder processes are classified as follows:

Soft-solders: Tliq < 450 °CBrazing: Tliq > 450 °C < 900 °CHigh-temperature brazing: Tliq > 900 °C

Beside the right selection of the solder, the flux if necessary, and ensuring that the surfaces are clean, the choice of the right brazing furnace is also key to the process. In addition to the actual brazing process, Nabertherm has furnaces for the preparation process in their range such as for metallizing ceramics in preparation for brazing ceramic-to-metal bonds.

The following furnace concepts are available for brazing: � Brazing in an annealing box in the air circulation chamber furnace up to 850 °C in a protective gas atmosphere � Brazing in an annealing box in a chamber furnace up to 1100 °C under a protective gas atmosphere � Brazing in a hot-wall retort furnace NR/NRA product line under protective gases or reaction gas up to 1100 °C � Brazing in a cold-wall retort furnace VHT product line under protective gases, reaction gases or under vacuum up to 2200 °C � Brazing in a salt bath up to 1000 °C salt bath temperature � Brazing or metallizing in a tube furnace up to 1800 °C under protective gases, reaction gases or in a vacuum up to 1400 °C (see separate Advanced Materials catalog)

In the Nabertherm Test Center in Lilienthal, Germany, a range of sample furnaces is available for customers testing applications which is the best approach to define the right furnace for a specific application.

Pre-Heating for Hot FormingFor traditional hot forming processes such as forging or die forming the piece must first be heated to a defined temperature. From the manufacture of individual parts to serial production, from thin metal sheets to components which are formed in the course of multiple passes – Nabertherm offers a broad range of furnaces and special solutions for these processes.

If, for example, only the ends of long components need to be heated, the furnace can be fitted with closable openings in the door to avoid any heat losses. To protect the operator, an isolating transformer is used which safely conducts away the electrical currents in case of touching the heating elements.

If the furnace is used near a forging hammer which causes strong vibrations, vibration dampers can be installed to separate the furnace from these frequencies. The needs of continuous forging processes are met by appropriate furnace models such as rotary hearth furnaces and continuous furnaces. The advantage of the rotary hearth furnace is its compact size and the charging/discharging of the work piece at one position.

If the task is to form sheet steel, for example in the automotive industry, the furnace needs a large width and depth in relation to its height. For easy charging, the furnaces are provided with a lift door and can, if necessary, be fitted with a charge support adapted for use with the charging stacker.

Brazing in annealing box

Hot-wall retort furnace to 1100 °C

DH 2500/ S on rails to shuttle between two forging stations

N 1760/S for pre-heating sheet metalssteel with charge support

N 6080/13 S with door-in-door function, isolating transformer and vibration dampers

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Tempering, Curing, Vulcanization and Degassing of Plastics, Rubber, Silicone, and Fiber Composite MaterialsMany plastics and fiber composite materials must be heat-treated for product improvement or to ensure that they have the required product properties. In most cases, chamber dryers or ovens with air circulation are used for the respective process. The following examples outline the processes which these furnaces can perform.

PTFE (polytetrafluoroethylene)One application is the heat treatment of PTFE. This process can be used to improve the adhesive properties, the mixture hardness or the sliding properties of the coating. In most cases, chamber dryers are used which, depending on the type of plastic, may or may not include safety technology based on EN 1539.

SiliconeOne reason why silicone is tempered is to reduce the amount of silicone oil in the silicone to a certain percentage, i.e. to drive it out, in order to meet relevant food regulations. During the tempering process the silicone oil is vented out of the furnace chamber by continuous air exchange. To optimize the temperature uniformity in the furnace chamber, the fresh air supply is preheated. Depending on the furnace size, a heat-recovery system with heat exchangers can result in significant energy savings and pay for itself in just a short time.

Parts are prevented from sticking together by keeping them moving in a rotating rack in the oven.

Carbon Composite MaterialsThese days, carbon composite materials are used in many industries such as automotive, aerospace, wind power, agriculture, etc. Different materials and manufacturing processes require different heat-treatment processes for curing composite materials.

Some of the processes are done in autoclaves. Other materials are heat-treated in chamber dryers or ovens with air circulation. In this case, the composite materials are frequently evacuated in vacuum bags. For this purpose, the furnace is equipped with suitable connections for the evacuation of the air bags.

Pages 6/7 contain a description of which Nabertherm furnace ranges are suitable for tempering and curing of plastics.

The openings for the vacuum and measure-ment connections of an air circulation chamber furnace

Drawer system for charging the furnace on several levels.

Silicone tempering furnace with tightly welded inner box and rotating rack for the charge.

Chamber dryer KTR 2000 for silicone tempering

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Heating from outside around the retort in models NRA ../09 and NR ../11

NR 75/06 with automatic gas injection and touch panel H 3700

NRA 17/06 - NRA 1000/11These gas tight retort furnaces are equipped with direct or indirect heating depending on temperature. They are perfectly suited for various heat treatment processes requiring a defined protective or a reaction gas atmosphere. These compact models can also be laid out for heat treatment under vacuum up to 600 °C. The furnace chamber consists of a gas tight retort with water cooling around the door to protect the special sealing. Equipped with the corresponding safety technology, retort furnaces are also suitable for applications under reaction gases, such as hydrogen or, in combination with the IDB package, for inert debinding or for pyrolysis processes.

Different model versions are available depending on the temperature range required for the process:

Models NRA ../06 with Tmax 650 °C � Heating elements located inside the retort � Temperature uniformity up to ∆T 6 K inside the working chamber from 100 °C - 600 °C see page 64 � Retort made of 1.4571 � Gas circulation fan in the back of the retort provides for optimal temperature uniformity

Models NRA ../09 with Tmax 950 °C � Outside heating with heating elements surrounding the retort as well as an additional door heater � Temperature uniformity up to ∆T 6 K inside the working chamber from 200 °C - 900 °C see page 64 � Retort made of 1.4841 � Fan in the back of the retort provides for optimal temperature uniformity

Models NR ../11 with Tmax 1100 °C � Outside heating with heating elements surrounding the retort as well as an additional door heater � Temperature uniformity up to ∆T 10 K inside the working chamber from 200 °C - 1050 °C see page 64 � Retort made of 1.4841

Hot-Wall Retort Furnaces up to 1100 °C

Inside heating in models NRA ../06

NR 17/06 with gas supply system

10

NRA 50/09 H2

NRA 480/04S

Vacuum pump for cold evacuation of the retort

Touchpanel H 3700 for automatic version

Basic version � Compact housing in frame design with removable stainless steel sheets � Controls and gas supply integrated in the furnace housing �Welded charging supports in the retort or air-baffle box in the furnace with air circulation � Swivel door hinged on right side with open cooling water system � Multi-zone control for 950 °C and 1100 °C version, separated by furnace chamber and door. Depending on furnace chamber additionally subdivided into one or several heating zones � Temperature control as charge control with temperature measurement inside and outside the retort � Gas supply system for one non-flammable protective or reaction gas with flow meter and solenoid valve, switchable via the control system � Operation under vacuum up to 600 °C with optional single-stage rotary vane pump � Port for vacuum pump for cold evacuation � PLC controls with touch panel H 700 for data input (resp. P 300 for 650 °C-version) see page 70

Additional equipment � Upgrade for other nonflammable gases � Automatic gas injection, including MFC flow controller for alternating volume flow, PLC controlled with touch panel H 3700 � Vacuum pump for evacuating of the retort up to 600 °C, attainable vacuum up to 10-5 mbar subject to selected pump � Cooling system for shortening process times � Heat exchanger with closed-loop cooling water circuit for door cooling � Measuring device for residual oxygen content

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Bayonet quick-lock for the retort, also with electric drive as additional equipment

NR 200/11 H2 for heat treatment under hydrogen

Model Tmax Model Tmax Working chamber dimensions in mm Useful volume Electrical°C °C w d h in l connection*

NRA 17/.. 650 or 950 NR 17/11 1100 225 350 225 17 3-phaseNRA 25/.. 650 or 950 NR 25/11 1100 225 500 225 25 3-phaseNRA 50/.. 650 or 950 NR 50/11 1100 325 475 325 50 3-phaseNRA 75/.. 650 or 950 NR 75/11 1100 325 700 325 75 3-phaseNRA 150/.. 650 or 950 NR 150/11 1100 450 750 450 150 3-phaseNRA 200/.. 650 or 950 NR 200/11 1100 450 1000 450 200 3-phaseNRA 300/.. 650 or 950 NR 300/11 1100 570 900 570 300 3-phaseNRA 400/.. 650 or 950 NR 400/11 1100 570 1250 570 400 3-phaseNRA 500/.. 650 or 950 NR 500/11 1100 720 1000 720 500 3-phaseNRA 700/.. 650 or 950 NR 700/11 1100 720 1350 720 700 3-phaseNRA 1000/.. 650 or 950 NR 1000/11 1100 870 1350 870 1000 3-phase

*Please see page 70 for more information about supply voltage

H2 Version for Operation under HydrogenWhen hydrogen is used as a process gas, the furnace is additionally equipped with the required safety technology. Only certified and industry proven safety sensors are used. The furnace is controlled by a fail-safe PLC control system (S7- 300F/safety controller).

� H2 supply at controlled overpressure of 50 mbar relative � Certified safety concept � PLC controls with graphic touch panel H 3700 for data input � Redundant gas inlet valves for hydrogen � Monitored pre-pressures of all process gases � Bypass for safe flushing of furnace chamber with inert gas � Torch for thermal afterburning of exhaust gases � Emergency flood container for purging the furnace in case of failore

IDB Version for Debinding under Non-flammable Protective Gases or for Pyrolysis ProcessesThe retort furnaces of the NR and NRA product line are perfectly suited for debinding under non-flammable protective gases or for pyrolysis processes. The IDB version of the furnaces implements a safety concept by controlled purging the furnace chamber with a protective gas. Exhaust gases are burned in an exhaust torch. Both the purging and the torch function are monitored to ensure a safe operation.

� Process control under monitored and controlled overpressure of 50 mbar relative � Certified safety concept � PLC controls with graphic touch panel H 1700 for data input � Monitored gas pre-pressure of the process gas � Bypass for safe flushing of furnace chamber with inert gas � Torch for thermal afterburning of exhaust gases

Charging of the NR 300/06 furnace with a pallet truck

Blueing of drills in water steam atmosphere in a furnace of the NRA range

Parallel guided door to open the hot furn-ace as additional equipment

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SRA 200/09

SRA 17/.. - SR 1500The retort furnaces SR and SRA (with gas circulation) are designed for operation with non-flammable or flammable protective or reaction gases. The furnace is loaded from above by crane or other lifting equipment provided by the customer. In this way, even large charge weights can be loaded into the furnace chamber. The SR furnaces are available in different versions.

Depending on the temperature range in which the furnace be used, the following models are available:

Models SR .../11 with Tmax 1100 °C � Heating from all sides outside the retort � Temperature uniformity up to ∆T 14 K according to DIN 17052-1 within the working chamber of 500 °C - 1100 °C see page 64 � Retort made of 1.4841 � Top down multi-zone control of the furnace heating

Models SRA ../09 with Tmax 950 °CDesign like models SR…/11 with following differences:

� Atmosphere circulation with powerful fan in the furnace lid provides for temperature uniformity of up to ∆T 8 K according to DIN 17052-1 within the working chamber of 200 °C - 900 °C see page 64

Models SRA ../06 with Tmax 600 °CDesign like models SRA…/09 with following differences:

� Heating inside the retort � Temperature uniformity up to ∆T 14 K according to DIN 17052-1 within the working chamber of 100 °C - 600 °C see page 64 � Single-zone control � Retort made of 1.4841

Standard Equipment (all models)Design like standard equipment of models NR and NRA with following differences:

� Charging from above with crane or other lifting equipment from customer � Hinged lid with opening to the side

Additional equipment, H2 version or IDB version see models NR and NRA

Retort furnace SRA 300/09

Model Tmax Inner dimensions of alloy retort Volume Outer dimensions in mm Heating power in kW1 Electrical Weight°C Ø in mm h in mm in l W D H 600 °C 950 °C connection* in kg

SRA 17/.. 250 350 17 1300 1700 1800 15 20 3-phase 600SRA 25/.. 250 500 25 1300 1900 1800 20 25 3-phase 800SRA 50/.. 400 450 50 1400 2000 1800 36 35 3-phase 1300SRA 100/.. 600 400 800 100 1400 2000 2100 45 65 3-phase 1500SRA 200/.. or 600 700 200 1600 2200 2200 60 90 3-phase 2100SRA 300/.. 950 600 1000 300 1600 2200 2500 75 120 3-phase 2400SRA 500/.. 800 1000 500 1800 2400 2700 70 170 3-phase 2800SRA 600/.. 800 1200 600 1800 2400 2900 90 190 3-phase 3000SRA 800/.. 1000 1000 800 2000 2600 2800 105 220 3-phase 3100SRA 1000/.. 1000 1300 1000 2000 2600 3100 120 250 3-phase 3300SRA 1500/.. 1200 1300 1500 2200 2800 3300 150 300 3-phase 3500

SR 17/11 1100 250 350 17 1300 1700 1800 22 3-phase 600SR 25/11 1100 250 500 25 1300 1900 1800 27 3-phase 800SR 50/11 1100 400 450 50 1400 2000 1800 40 3-phase 1300SR 100/11 1100 400 800 100 1400 2000 2100 73 3-phase 1500SR 200/11 1100 600 700 200 1600 2200 2200 98 3-phase 2100SR 300/11 1100 600 1000 300 1600 2200 2500 132 3-phase 2400SR 500/11 1100 800 1000 500 1800 2400 2700 182 3-phase 2800SR 600/11 1100 800 1200 600 1800 2400 2900 205 3-phase 3000SR 800/11 1100 1000 1000 800 2000 2600 2800 235 3-phase 3100SR 1000/11 1100 1000 1300 1000 2000 2600 3100 268 3-phase 3300SR 1500/11 1100 1200 1300 1500 2200 2800 3300 315 3-phase 3500

1Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage13

VHT 8/18-GR - VHT 500/18-KEThe compact furnaces of the VHT product line are available as electrically heated chamber furnaces with graphite, molybdenum, tungsten or MoSi2 heating. A wide variety of heating designs as well as a complete range of accessories provide for optimal furnace configurations even for sophisticated applications.

The vacuum-tight retort allows heat treatment processes either in protective and reaction gas atmospheres or in a vacuum, subject to the individual furnace specs to 10-5 mbar. The basic furnace is suited for operation with non-flammable protective or reactive gases or under vacuum. The H2 version provides for operation under hydrogen or other flammable gases. Key of the specification up is a certified safety package providing for a safe operation at all times and triggers an appropriate emergency program in case of failure.

Alternative Heating SpecificationsThe following heating systems are available for the different application temperatures:

VHT ../GR with Graphite Insulation and Heating � Suitable for processes under protective and reaction gases or under vacuum � Tmax 1800 °C or 2200 °C (2400 °C as additional equipment) � Max. vacuum up to 10-4 mbar depending on pump type used � Graphite felt insulation

VHT ../MO or ../W with Molybdenum or Tungsten Heating � Suitable for high-purity processes under protective and reaction gases or under high vacuum � Tmax 1200 °C, 1600 °C or 1800 °C (see table) � Max. vacuum up to 5 x 10-5 mbar depending on pump type used � Insulation made of molybdenum rsp. tungsten radiation sheets

VHT ../KE with Fiber Insulation and Heating through Molybdenum Disilicide Heating Elements � Suitable for processes under protective and reaction gases, in air or under vacuum � Tmax 1800 °C � Max. vacuum up to 10-2 mbar (up to 1300 °C) depending on pump type � Insulation made of high purity aluminum oxide fiber

Cold-Wall Retort Furnaces up to 2400 °C

VHT 8/18-KE with fiber insulation and molybdenum disilicide heating elements

VHT 500/22-GR H2 with CFC-process box and extension package for operation under hydrogen

Heat treatment of copper bars under hydro-gen in VHT 08/16 MO

14

Graphite heating chamber

Ceramic fiber insulation

Molybdenum heating chamber

Standard Equipment for all Models

Basic version � Standard furnace sizes 8 - 500 liters � A water-cooled stainless steel process reactor sealed with temperature-resistant o-rings � Frame made of stable steel profiles, easy to service due to easily removable stainless steel panels � Housing of the VHT 8 model on castors for easy repositioning of furnace � Cooling water manifold with manual stopcocks in supply and return lines, automatic flowmeter monitoring, openloop cooling water system � Adjustable cooling water circuits with flowmeter and temperature indicator and overtemperature fuses � Switchgear and controller integrated in furnace housing � H 700 PLC control with clearly laid out 5.7“ touchpanel control for program entry and display, 10 programs each with 20 segments � Over-temperature limiter with manual reset for thermal protection class in accordance with EN 60519-2 � Manual operation of the process gas and vacuum functions � Manual gas supply for one process gas (N2 or Ar) with adjustable flow � Bypass with manual valve for rapid filling or flooding of furnace chamber � Manual gas outlet with overflow valve (20 mbar relative) � Single-stage rotary vane pump with ball valve for pre-evacuating and heat treatment in a rough vacuum to 5 mbar � Pressure gauge for visual pressure monitoring

Additional equipment � Tmax 2400 °C � Housing, optionally divisible, for passing through narrow door frames (VHT 08) � Manual gas supply for second process gas (N2 or Ar) with adjustable flow and bypass � Inner process box made of molybdenum, tungsten or CFC, especially recommended for debinding processes. The box is installed in the furnace with direct gas inlet and outlet and provides for better temperature uniformity. Due to a change in gas supply direction after debinding a clean process atmosphere for sintering is achieved. � Charge thermocouple with display � Temperature measurement at 2200 °C models with pyrometer and thermocouple, type S with automatic pull-out device for precise control results in the low temperature range (VHT 40 and larger) � Two-stage rotary vane pump with ball valve for pre-evacuating and heat-treating in a vacuum to 10-2 mbar � Turbo molecular pump with slide valve for pre-evacuation and for heat treatment in a vacuum to 10-5 mbar including electric pressure transducer and booster pump (only VHT…/MO) � Other pumps on request � Heat exchanger with closed-loop cooling water circuit � Automation package with graphic touch panel H 3700

- 12" graphic touch panel H 3700 - Input of all process data like temperatures, heating rates, gas injection, vacuum at the touch panel - Display of all process-relevant data on a process control diagram - Automatic gas supply for one process gas (N2 , argon or forming gas) with adjustable flow - Bypass for flooding and filling the chamber with process gas controlled by the program - Automatic pre- and post programs, including leak test for safe furnace operation - Automatic gas outlet with bellows valve and overflow valve (20 mbar) - Transducer for absolute and relative pressure

� MFC flow controller for alternating volume flow and generation of gas mixtures with second process gas (only with automation package) � Partial pressure operation: protective gas flushing at controlled underpressure (only with automation package) � PC control via NCC with corresponding optional documentation and connection to customer PC networks

Thermocouple, type S with automatic pull-out device for precise control results in the low temperature range

Tungsten heating chamber

15

VHT 40/16MO H2

VHT gas supply diagram, debinding and sintering

H2 Version for Operation with Hydrogen or other Reaction GasesIn the H2 version the furnaces can be operated under hydrogen or other reaction gases. For these applications, the systems are additionally equipped with the required safety technology. Only certified and industry proven safety sensors are used. The furnaces are controlled by a fail-safe PLC control system (S7-300F/safety controller).

� Certified safety concept � Automation package (see additional equipment above) � Redundant gas inlet valves for hydrogen � Monitored pre-pressures of all process gases � Bypass for safe purging of furnace chamber with inert gas � Pressure-monitored emergency flooding with automated solenoid valve opening � Electric or gas-heated exhaust gas torch for H2 post-combustion � Atmospheric operation: H2-purging of process reactor starting from room temperature at controlled over pressure (50 mbar relative)

Additional equipment � Partial pressure operation: H2 flushing at underpressure in the process reactor starting from 750 °C furnace chamber temperature � Retort in the process chamber for debinding under hydrogen

Single-stage rotary vane pump for heat treatment in a rough vacuum to 20 mbar

Two-stage rotary vane pump for heat treatment in a vacuum to 10-2 mbar

Turbo-molecular pump with booster pump for heat treatment in a vacuum to 10-5 mbar

Turbo-molecular pump

VHT 40/22 GR with motor-driven lift door and front frame for connection to a glove box

16

VHT 08/16 MO with hydrogen extension package and process box

Process Box for Debinding in Inert GasCertain processes require charges to be debinded in non-flammable protective or reactive gases. For these processes we fundamentally recommend a hot-wall retort furnace (see models NR… or SR…). These furnaces can ensure that the formation of condensation will be avoided as throughly as possible.

If there is no way to avoid the escape of small amounts of residual binder during the process, even in the VHT furnace, the furnace should be designed to meet this contingency.

The furnace chamber is equipped with an additional process box that has a direct outlet to the exhaust gas torch through which the exhaust gas can be directly vented. This system enables a substantial reduction in the amount of furnace chamber contamination caused by the exhaust gases generated during debinding.

Depending on the exhaust gas composition the exhaust gas line can be designed to include various options.

� Exhaust gas torch for burning off the exhaust gas � Condensation trap for separating out binding agents � Exhaust gas post-treatment, depending on the process, via scrubbers � Heated exhaust gas outlet to avoid condensation deposits in the

exhaust gas line

VHT ...-../GR VHT ...-../MO VHT ...-18/W VHT ...-18/KETmax 1800 °C or 2200 °C 1200 °C or 1600 °C 1800 °C 1800 °CInert gas Air/Oxygen up to 350 °C - - Hydrogen 3 3 3 1,3

Rough vacuum and fine vacuum (>10-3 mbar) ²High vacuum (<10-3 mbar) - ²Material of heater Graphite Molybdenum Tungsten MoSi2Material of insulation Graphite felt Molybdenum Tungsten/Molybdenum Ceramic fiber¹Up to 1400 °C 3Only with safety package for flammable gases²Depending on Tmax

Model Inner dimensions in mm Volume Max. charge Outer dimensions in mm Heating power in kW4

w d h in l weight/kg W D H Graphite Molybdenum Tungsten Ceramic fiberVHT 8/.. 170 240 200 8 5 1250 (800)¹ 1100 2000 27 19/34³ 50 12VHT 40/.. 300 450 300 40 30 1600 2100 2300 83/103² 54/100³ 134 30VHT 70/.. 375 500 375 70 50 1700 2500 2400 105/125² 70/130³ 160 55VHT 100/.. 450 550 450 100 75 1900 2600 2500 131/155² 90/165³ 210 85VHT 250/.. 600 750 600 250 175 2300 2800 2800 180/210² 125/220³ on request on requestVHT 500/.. 750 900 750 500 350 2500 3200 3000 220/260² on request on request on request¹With the switching system unit removed ³1200 °C/1600 °C²1800 °C/2200 °C 4Depending on furnace design connected load might be higher

Model Inner dimensions of process box in mm Volumew d h in l

VHT 8/.. 120 210 150 3,5VHT 40/.. 250 430 250 25,0VHT 70/.. 325 475 325 50,0VHT 100/.. 425 500 425 90,0VHT 250/.. 575 700 575 230,0VHT 500/.. 725 850 725 445,0

17

Model Tmax Working chamber dimensions

Useful volume Outer dimensions in mm Heating power Electrical

°C Ø x h in mm in l W D H in kW1 connection*SVHT 2/24-W 2400 150 x 150 2,5 1400 2500 2100 55 3-phaseSVHT 9/24-W 2400 230 x 230 9,5 1500 2750 2100 95 3-phase

SVHT 2/30-GR 3000 150 x 150 2,5 1400 2500 2100 55 3-phaseSVHT 9/30-GR 3000 230 x 230 9,5 1500 2750 2100 95 3-phase1Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage

Pit-Type Cold-Wall Retort Furnaces up to 2400 °C or up to 3000 °CSVHT 2/24-W - SVHT 9/30-GRCompared with the VHT models (page 14 ff), the furnaces of the SVHT product line offer improved performance data with regard to achievable vacuum and maximum temperature. Due to the design as pit-type furnace with tungsten heating, processes up to max. 2400 °C even in high vacuum can be implemented with models of the SVHT..-W product line. Models of the SVHT..-GR product line with graphite heating, also in pit-type design, can be operated in an inert gas atmosphere even up to max. 3000 °C.

� Standard sizes with a furnace chamber of 2 or 9 liters � Designed as pit-type furnace, charged from above � Frame construction with inserted sheets of textured stainless steel � Dual shell water-cooled stainless steel container � Manual operation of process gas and vacuum functions � Manual gas supply for non-combustible process gas � A step in front of the furnace for an ergonomic charging height � Retort lid with gas-charged shock absorbers � Controls and switchgear as well as gas supply integrated in furnace housing � Further standard product characteristics see description for standard design of VHT models page 14

SVHT 9/24-W with tungsten heating

Cylindrical retort with tungsten heating

Graphite heating module

Water-cooling controls

Heating options

SVHT ..-GR � Applicable for processes:

- under protective or reaction gases or in the vacuum up to 2200 °C - under inert gases (argon, helium) up to 3000 °C

� Max. vacuum up to 10-³ mbar depending on the type of pump used � Heating: graphite heating elements in cylindrical arrangement � Insulation: graphite felt insulation � Temperature measurement by means of an optical pyrometer

SVHT ..-W � Applicable for processes under protective or reaction gases or in vacuum up to 2400 °C � Max. vacuum up to 10-� mbar depending on the type of pump used � Heating: cylindrical tungsten heating module � Insulation: tungsten and molybdenum radiant plates � Temperature measurement with optical pyrometer

Additional equipment such as automatic process gas control or design for the operation with flammable gases incl. safety system see VHT models page 14.

18

LBVHT 600/24-GR

LBVHT 100/16 - LBVHT 600/24The LBVHT model series with lift-bottom specification are especially suitable for production processes which require either protective or reaction gase atmosphere or a vacuum. The basic performance specifications of these models are similar to the VHT models. Their size and design with electro-hydraulically driven table facilitate charging during production. The furnaces are available in various sizes and designs. Similar like the VHT models, these furnaces can be equipped with different heating concepts.

� Standard furnace sizes between 100 and 600 liters � Designed as lift-bottom retort furnace with electro-hydraulically driven table for easy and well-arranged charging � Prepared to carry heavy charge weights � Different heating concepts using

- Graphite heating chamber up to Tmax 2400 °C - Molybdenum heating chamber up to Tmax 1600 °C - Tungsten heating chamber up to Tmax 2000 °C

� Frame structure filled with textured stainless steel sheets � Standard design with gassing system for non-flammable protective or reaction gases � Automatic gas supply system which also allows for operation with several process gases as additional equipment � Gas supply systems for operating with hydrogen or other combustible reaction gases incl. safety package as additional equipment � Switchgear and control box as well as gassing system integrated into the furnace housing � Further product characteristics of the standard furnace as well as possible additional equipment can be found in the description of the VHT furnaces from Page 14

Lift-Bottom -Retort Furnace up to 2400 °C for Production

LBVHT 250/20-W with tungsten heating chamber

LBVHT with graphite heating chamber

Model Tmax Model Tmax Model Tmax Inner dimensions in mm Volume Electrical°C °C °C Ø h in l connection*

LBVHT 100/16-MO 1600 LBVHT 100/20-W 2000 LBVHT 100/24-GR 2400 450 700 100 3-phaseLBVHT 250/16-MO 1600 LBVHT 250/20-W 2000 LBVHT 250/24-GR 2400 600 900 250 3-phaseLBVHT 600/16-MO 1600 LBVHT 600/20-W 2000 LBVHT 600/24-GR 2400 800 1200 600 3-phase

*Please see page 70 for more information about supply voltage

19

Air Circulation Chamber Furnaces < 675 Liters Electrically Heated

The very good temperature uniformity of these chamber furnaces with air circulation provides for ideal process conditiones for annealing, curing, solution annealing, artificial ageing, preheating, or soft annealing and brazing. The furnaces are equipped with a suitable annealing box for soft annealing of copper or tempering of titanium, and also for annealing of steel under non-flammable protective or reaction gases. The modular furnace design allows for adaptation to specific process requirements with appropriate accessories.

� Tmax 450 °C, 650 °C, or 850 °C � Heating from bottom, sides and top � Stainless steel air-baffle box in the furnace for optimum air circulation � Swing door hinged on the right side � Base frame included in the delivery, N 15/65 HA designed as table-top model � Horizontal air circulation � Temperature uniformity up to ∆T 8 K according to DIN 17052-1 (model N 15/65 HA up to ∆T 14 K) see page 64 � Optimum air distribution enabled by high flow speeds � One removable tray and rails for two additional trays included in the scope of delivery (N 15/65 HA without removable tray) � Controls description see page 68

Additional equipment (not for model N 15/65HA) � Optimization of the temperature uniformity up to ∆T 6 K according to DIN 17052-1 see page 64 � Fan cooling to accelerate the cooling process � Motorized exhaust air flaps � Manual lift door � Pneumatic lift door � Adjustable air circulation for sensitive components � Additional removable trays � Roller conveyor in furnace chamber for heavy charges

N 15/65HA as table-top model

N 250/65HA with gas supply systemN 60/45HAS with additional door for charging of long parts which ride out of the open door

Roller conveyor in furnace N 250/85HA

20

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Heating Electrical Weight°C w d h in l W D H power in kW3 connection* in kg

N 30/45 HA 450 290 420 260 30 607 + 255 1175 1315 3.6 1-phase 195N 60/45 HA 450 350 500 350 60 667 + 255 1250 1400 6.6 3-phase 240N 120/45 HA 450 450 600 450 120 767 + 255 1350 1500 9.6 3-phase 310N 250/45 HA 450 600 750 600 250 1002 + 255 1636 1860 19.0 3-phase 610N 500/45 HA 450 750 1000 750 500 1152 + 255 1886 2010 28.0 3-phase 1030N 675/45 HA 450 750 1200 750 675 1152 + 255 2100 2010 28.0 3-phase 1350

N 15/65 HA¹ 650 295 340 170 15 470 845 460 2.7 1-phase 55N 30/65 HA 650 290 420 260 30 607 + 255 1175 1315 6.0 3-phase² 195N 60/65 HA 650 350 500 350 60 667 + 255 1250 1400 9.6 3-phase 240N 120/65 HA 650 450 600 450 120 767 + 255 1350 1500 13.6 3-phase 310N 250/65 HA 650 600 750 600 250 1002 + 255 1636 1860 21.0 3-phase 610N 500/65 HA 650 750 1000 750 500 1152 + 255 1886 2010 31.0 3-phase 1030N 675/65 HA 650 750 1200 750 675 1152 + 255 2100 2010 31.0 3-phase 1350

N 30/85 HA 850 290 420 260 30 607 + 255 1175 1315 6.0 3-phase² 195N 60/85 HA 850 350 500 350 60 667 + 255 1250 1400 9.6 3-phase 240N 120/85 HA 850 450 600 450 120 767 + 255 1350 1500 13.6 3-phase 310N 250/85 HA 850 600 750 600 250 1002 + 255 1636 1860 21.0 3-phase 610N 500/85 HA 850 750 1000 750 500 1152 + 255 1886 2010 31.0 3-phase 1030N 675/45 HA 850 750 1200 750 675 1152 + 255 2100 2010 31.0 3-phase 1350

¹Table-top model see page 20 *Please see page 70 for more information about supply voltage²Heating only beetween two phases 3Depending on furnace design connected load might be higher

� Annealing boxes see page 50 � Feed and charging aids see page 48 � Designed for Tmax 950 °C � Process control and documentation with Controltherm MV software package see page 69

N 250/65HA with quenching bath N 120/85HAS with charging basket

Air circulation furnace N 500/HAS with four compartments, each with roller conveyor and individual door

21

N 3920/26HAS

Enclosed heater coils on electrically heated models

Gas burner positioned along the furnace side

N 1500/85HA with electric charging system for heavy loads

These air circulation chamber furnaces are available for maximum operating temperatures of 260 °C, 450 °C, 600 °C or 850 °C and are perfectly suited for demanding processes. Due to their robust and solid design even heavy loads can be heat treated. These furnaces are suited for use with baskets, pallets, and mobile furnace racks. The charging can be carried out with fork lift, pallet truck, or charging trolley. The basic furnace is standing on the shop floor without floor insulation. Charging can be simplified by roller conveyors, if necessary also motorized. All furnaces are available with electric or gas heating.

Standard version for models up to 600 °C (850 °C models see page 24) � Tmax 260 °C, 450 °C or 600 °C � Electrically heated or gas-fired � Electric heating by means of heater coils � Direct gas heating or upon request with indirect gas heating with radiation tube, e.g. for heat treatment of aluminum � Optimal air circulation for your charge by means of adjustable air outlets � Horizontal air flow (type ../HA) � High air exchange for perfect heat transfer � Ground level charging without floor insulation for 260 °C models � Temperature uniformity up to ∆T 10 K according to DIN 17052-1 see page 64 � Furnace chamber lined with alloy 1.4301 (DIN) � High quality mineral wool insulation provides for low outer temperatures � Inside unlocking device for furnaces with walk-in chambers � Furnace sizes suitable for common charging systems, such as pallets, baskets, etc. � Double-wing door for furnaces with an internal width of more than 1500 mm (260 °C and 450 °C models). Furnaces for higher temperatures and with smaller sizes are equipped with a single-wing door.

Air Circulation Chamber Furnaces > 560 Liters Electrically Heated or Gas-Fired

22

Track cutouts for pallet truck or charging cart

N 2520/60HA with roller conveyor inside and in front of the furnace

N 1500/85HA with lift door and work piece holders in the furnace

Pull-out drawers for heavy loads

� Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load � Controls description see page 68

Additional equippment for models up to 600 °C � Optional floor insulation provides for improved temperature uniformity for 260 °C models � Entry ramps or track cutouts for floor-level charging cart of models with bottom insulation (not for 600 °C models) � Furnace positioned on base frame provides for ergonomic charging height � Electro-hydraulic lift door � Fan system for faster cooling with manual or motor-driven control � Motor-driven control of air inlet and exhaust air flaps for better ventilation of the furnace chamber � Observation window and/or furnace chamber lighting (not for 600 °C models) � Optimization of the temperature uniformity up to +/- 3 °C according to DIN 17052-1 see page 64 � Safety technology according to EN 1539 for charges containing solvents (not for 600 °C models) see page 30 � Charging systems or roller conveyors, also electrically driven provide for easy charging see page 48 � Catalytic or thermal exhaust gas cleaning systems � Process control and documentation with Controltherm MV software package see page 69

23

Air Circulation Chamber Furnaces > 560 Liters Electrically Heated or Gas-Fired

Standard version for models 850 °C � Tmax 850 °C � Electrically heated or gas-fired � Electric heating with heating elements on supports tubes � Direct gas heating into the outlet of the air circulation fan � Optimal air circulation for your charge by means of adjustable air outlets � Horizontal air-flow (type ../HA) � High air exchange provides for perfect heat transfer � Base frame with 900 mm charging height � Temperature uniformity up to ∆T 10 K according to DIN 17052-1 see page 64 � Air baffles made of 1.4828 (DIN) � Multi-layer insulation with fiber plates (not classified according to EU directive 67/548) provides for low outer temperatures � Furnaces sizes perfectly suited to accommodate common charging systems, e.g. like pallets or pallet boxes � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load � Controls description see page 68

Additional equipment for models 850 °C � Electro-hydraulic lift door � Fan system for faster cooling with manual or motor-driven control � Motor-driven air inlet and control of exhaust air flaps for better ventilation of the furnace chamber � Optimization of the temperature uniformity up to +/- 3 °C according to DIN 17052-1 see page 64 � Base frame for customized charging height � Charging systems or roller conveyors, also electrically driven provide for easy charging see page 48 � Designed for Tmax 950 °C � Process control and documentation with Controltherm MV software package see page 69

N 670/65HAS with quenching tank

Air circulation furnace N 790/65HAS, ad-justable in height, for integration in a heat treatment system

Air circulation chamber furnace N 140000/26AS for curing of composites in vacuum bags incl. pump and necessary connections in the oven chamber

24

N 24500/20HASN 12000/25AS

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Circulation Heating Electrical°C w d h in l W D H rate m³/h power in kW2 connection*

N 560/26HA 260 750 1000 750 560 1450 1865 2220 900 13.0 3-phaseN 1000/26HA 260 1000 1000 1000 1000 1930 1900 1600 3600 18.0 3-phaseN 1500/26HA 260 1500 1000 1000 1500 2380 1900 1600 3600 22.0 3-phaseN 1500/26HA1 260 1000 1500 1000 1500 1880 2400 1600 3600 22.0 3-phaseN 2000/26HA 260 1500 1100 1200 2000 2380 2000 1800 6400 22.0 3-phaseN 2000/26HA1 260 1100 1500 1200 2000 1980 2400 1800 6400 22.0 3-phaseN 2010/26HA 260 1000 1000 2000 2000 1880 1900 2720 7200 30.0 3-phaseN 2880/26HA 260 1200 1200 2000 2880 2080 2100 2720 9000 54.0 3-phaseN 4000/26HA 260 1500 2200 1200 4000 2380 3110 1800 9000 47.0 3-phaseN 4000/26HA1 260 2200 1500 1200 4000 3080 2410 1800 9000 47.0 3-phaseN 4010/26HA 260 1000 2000 2000 4000 1880 2900 2720 9000 54.0 3-phaseN 4500/26HA 260 1500 1500 2000 4500 2380 2400 2720 12800 54.0 3-phaseN 5600/26HA 260 1500 2500 1500 5600 2110 3180 2340 9000 69.0 3-phaseN 6750/26HA 260 1500 3000 1500 6750 2110 3680 2340 19200 98.0 3-phaseN 7200/26HA 260 2000 1500 2400 7200 2610 2410 3000 18000 93.0 3-phaseN 10000/26HA 260 2000 2500 2000 10000 2610 3180 2840 25600 106.0 3-phase

N 560/45HA(E¹) 450 750 1000 750 560 1450 1865 2220 900 13.0¹/ 19.0 3-phaseN 1000/45HA(E¹) 450 1000 1000 1000 1000 1930 1900 1600 3600 18.0¹/ 40.0 3-phaseN 1500/45HA(E¹) 450 1500 1000 1000 1500 2380 1900 1600 3600 22.0¹/ 40.0 3-phaseN 1500/45HA1(E¹) 450 1000 1500 1000 1500 1880 2400 1600 3600 22.0¹/ 40.0 3-phaseN 2000/45HA(E¹) 450 1500 1100 1200 2000 2380 2000 1800 6400 22.0¹/ 46.0 3-phaseN 2000/45HA1(E¹) 450 1100 1500 1200 2000 1980 2400 1800 6400 22.0¹/ 46.0 3-phaseN 2010/45HA(E¹) 450 1000 1000 2000 2000 1880 1900 2720 7200 30.0¹/ 54.0 3-phaseN 2880/45HA(E¹) 450 1200 1200 2000 2880 2080 2100 2720 9000 54.0¹/ 66.0 3-phaseN 4000/45HA(E¹) 450 1500 2200 1200 4000 2380 3110 1800 9000 47.0¹/ 65.0 3-phaseN 4000/45HA1(E¹) 450 2200 1500 1200 4000 3080 2410 1800 9000 47.0¹/ 65.0 3-phaseN 4010/45HA(E¹) 450 1000 2000 2000 4000 1880 2900 2720 9000 54.0¹/ 66.0 3-phaseN 4500/45HA(E¹) 450 1500 1500 2000 4500 2380 2400 2720 12800 54.0¹/ 66.0 3-phaseN 5600/45HA(E¹) 450 1500 2500 1500 5600 2110 3180 2340 9000 69.0¹/ 93.0 3-phaseN 6750/45HA(E¹) 450 1500 3000 1500 6750 2110 3680 2340 19200 98.0¹/116.0 3-phaseN 7200/45HA(E¹) 450 2000 1500 2400 7200 2610 2410 3000 18000 93.0¹/117.0 3-phaseN 10000/45HA(E¹) 450 2000 2500 2000 10000 2610 3180 2840 25600 106.0¹/130.0 3-phase

N 1000/60HA 600 1000 1000 1000 1000 1930 1900 1600 3600 40.0 3-phaseN 1500/60HA 600 1500 1000 1000 1500 2380 1900 1600 3600 40.0 3-phaseN 1500/60HA1 600 1000 1500 1000 1500 1930 2400 1600 3600 40.0 3-phaseN 2000/60HA 600 1500 1100 1200 2000 2380 2000 1800 6400 46.0 3-phaseN 2000/60HA1 600 1100 1500 1200 2000 1980 2400 1800 6400 46.0 3-phaseN 4000/60HA 600 1500 2200 1200 4000 2380 3110 1800 9000 65.0 3-phaseN 4000/60HA1 600 2200 1500 1200 4000 3080 2410 1800 9000 65.0 3-phase

N 1000/85HA 850 1000 1000 1000 1000 2100 2000 1900 3400 46.0 3-phaseN 1500/85HA 850 1500 1000 1000 1500 2600 2000 1900 6400 46.0 3-phaseN 1500/85HA1 850 1000 1500 1000 1500 2100 2600 1900 6400 46.0 3-phaseN 2000/85HA 850 1500 1100 1200 2000 2600 2100 2100 9000 64.0 3-phaseN 2000/85HA1 850 1100 1500 1200 2000 2200 2800 2100 9000 64.0 3-phaseN 4000/85HA 850 1500 2200 1200 4000 2600 3400 2100 12600 97.0 3-phase¹Reduced connected power for plastics applications *Please see page 70 for more information about supply voltage2Depending on furnace design connected load might be higher

N 4010/45HA with track cutouts, chamber lighting and observation window

N 3968/80HAS for heat treatment of cutting tools

25

Chamber Dryer Electrically Heated or Gas-Fired

The chamber dryers of the KTR range can be used for complex drying processes and heat treatment of charges of normal weight and packing density to an application temperature of 260 °C. The high-performance air circulation enables optimum temperature uniformity throughout the usable space. A wide range of accessories allow the furnace to be modified to meet specific process requirements. The design for the heat treatment of combustible materials in conformance with EN 1539 is available for all sizes.

� Tmax 260 °C � Electrically heated (via a heating register with integrated chrome steel heating elements) or gas-fired (direct gas heating including injection of the hot air into the intake duct) � Temperature uniformity up to ∆T 6 K according to DIN 17052-1 (for design wihout track cutouts) see page 64

Motor-driven rotary rack with baskets for moving the charge during heat treatment

Production system, consisting of four chamber dryers for moving the load during heat treatment along with a three-stage heat

exchanger to optimize energy efficiency

Standard models

Charging cart with pull-out trays

26

KTR 6125 KTR 1500 with charging cart

KTR 3100/S for curing of composites in vacuum bags incl. pump and necessary connections in the oven chamber

� High-quality mineral wool insulation provides for outer temperatures of < 20 °C above room temperature � High air exchange for fast drying processes � Double-wing door for furnaces KTR 3100 and larger � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the dryer and load � Incl. floor insulation � Controls description see page 68

Additional equipment � Entry ramp for pallet trucks or track cutouts for charging cart � Optimal air circulation for individual charges by means of adjustable air outlets � Fan system for faster cooling with manual or motor-driven control � Programmed opening and closing of exhaust air flaps � Observation window and furnace chamber lighting � Safety technology according to EN 1539 for charges containing solvents see page 30 � Charging cart with or without rack system � Design for clean room heat treatment processes see page 31 � Process control and documentation with Controltherm MV software package see page 69

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Heating power Electrical°C w d h in l W D H in kW1 connection*

KTR 1500 260 1000 1000 1500 1500 1930 1430 2315 21 3-phaseKTR 3100 260 1250 1250 2000 3100 2160 1680 2880 30 3-phaseKTR 4500 260 1500 1500 2000 4500 2410 1930 2880 50 3-phaseKTR 6125 260 1750 1750 2000 6125 2660 2180 3000 50 3-phaseKTR 8000 260 2000 2000 2000 8000 2910 2430 3000 59 3-phase

1Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage Air-circulation in the chamber dryer

27

TR 240

Ovens, also with Safety Technology According to EN 1539 Electrically Heated

TR 60 - TR 1050With their maximum working temperature of up to 300 °C and forced air circulation, the ovens achieve a perfect temperature uniformity which is much better than in ovens of most competitors. They can be used for various applications such as e.g. drying, sterilizing or warm storing. Ample warehousing of standard models provides for short delivery times.

� Tmax 300 °C �Working range: + 5 °C above room temperature up to 300 °C � Models TR 60 - TR 240 designed as tabletop models � Models TR 450 and TR 1050 designed as floor standing models � Horizontal, forced air circulation results in temperature uniformity better than ∆T 8 K see page 64 � Stainless steel chamber, alloy 304 (AISI)/(DIN material no. 1.4301), rust-resistant and easy to clean � Large handle to open and close the door � Charging in multiple layers possible using removeable grids (number of removeable grids included, see table to the right) � Large, wide-opening swing door, hinged on the right with quick release for models TR 60 - TR 450 � Double swing door with quick release for TR 1050 � TR 1050 equipped transport rollers � Infinitely adjustable exhaust at the rear wall with operation from the front � PID microprocessor control with self-diagnosis system � Solid state relays provide for low noise operation � Controls description see page 68

Additional equipment � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load � Infinitely adjustable fan speed of the air circulation fan �Window for charge observing � Further removeable grids with rails � Side inlet

Extricable metal grids to load the oven in different layers

Electrical rotating device as additional equipment

TR 60 with adjustable fan speed

28

TR 240

TR 1050 with double door

� Stainless steel collecting pan to protect the furnace chamber � Safety Technology according to EN 1539 for charges containing liquid solvents (TRS) up to model TRS 240, achievable temperature uniformity ∆T 16 K � Transport costors for model TR 450 � Various modifications available for individual needs � Upgrading available to meet the quality requirements of AMS 2750 E or FDA � Process control and documentation with Controltherm MV software package see page 69

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Heating Electrical Weight Grids in- Grids Max.°C w d h in l W D H power in kW² connection* in kg cluded max. total load¹

TR 60 300 450 380 350 60 700 650 690 3.1 1-phase 90 1 4 120TRS 60 260 450 360 350 57 700 680 690 6.3 3-phase 92 1 4 120TR 120 300 650 380 500 120 900 650 840 3.1 1-phase 120 2 7 150TRS 120 260 650 360 500 117 900 680 840 6.3 3-phase 122 2 7 150TR 240 300 750 550 600 240 1000 820 940 3.1 1-phase 165 2 8 150TRS 240 260 750 530 600 235 1000 850 940 6.3 3-phase 167 2 8 150TR 450 300 750 550 1100 450 1000 820 1440 6.3 3-phase 235 3 15 180TR 1050 300 1200 630 1400 1050 1470 955 1920 9.3 3-phase 450 4 14 250¹Max load per layer 30 kg *Please see page 70 for more information about supply voltage²Depending on furnace design connected load might be higher

TR 60 with observation window

TR 450 with observation window

29

Drying oven KTR 1500 for drying of foundry cores with an alcohol-based binder

Air Circulation Chamber Furnaces/Ovens with Safety Technology for Solvent-Containing Charges according to EN 1539 or NFPA 86

Guide-in tracks for furnaces with bottom insulation

Exhaust port and powerful exhaust fan mounted on the furnace

Ship-lock type furnace N 560/ 6HACLS with safety technology, front charging and rear unloading

Safety Technology for Air Circulation Chamber FurnacesCertain processes release and vaporize solvents or other flammable vapors. The concentration of these vapors must be kept below a certain limit to prevent ignition. European Norm EN 1539 and NFPA 86 in the USA prescribe the required safety equipment for these processes.

For these applications and processes, all air circulation furnaces of the KTR and air circulation chamber furnaces < 450 °C product lines are suited with safety technology for protection of a potentional ignition in the furnace chamber.

To avoid an ignition in the furnace, flammable vapors must be diluted with air. Special care must be taken so high concentrations of flammable materials do not accumulate in “dead” areas within the furnace. For this purpose, the furnaces are equipped with an exhaust gas fan providing for a defined underpressure. A measurement system monitors this flow, while fresh air is simultaneously resupplied. In parallel, the furnace atmosphere is diluted by the inflow of fresh air. The air circulation is also monitored by the measurement system.

� Furnace sizes between 120 and 10,000 liters � Powerful exhaust fan capable of maintaining underpressure in the furnace � Defined and monitored air circulation flow and exhaust air � Visual and audible emergency signals � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

30

Clean room applications impose particularly high requirements to the design of the chosen furnace. If the complete furnace is operated in a clean room an essential contamination of the clean room atmosphere must be avoided. Especially, the particle contamination must be reduced to a minimum.

The specific application determines the choice of the required oven or furnace type. In many cases air circulation furnaces are required to achieve the necessary temperature uniformity at lower temperatures. For higher temperatures, Nabertherm has also delivered many furnaces with radiant heating.

Furnace Installation in the Clean RoomIf the complete furnace is supposed to be positioned in the clean room, then it is important that both the furnace chamber and the furnace housing as well as the controls provide for good protection against contamination. Surfaces must be easy to clean. The furnace chamber is tightly sealed to the insulation behind it. If necessary, additional equipment such as filters for the fresh air supply or the air circulation in the furnace can be used to improve the cleanliness class. It is recommended to install the switchgear and the furnace controls outside the clean room.

Furnace Installation in the Grey Room, Furnace Charging from the Clean RoomAn easy installation alternative to improve cleanness is placing the furnace in the grey room with charging from the clean room. This significantly reduces the amount of costly space needed in the clean room to a minimum. The front and the furnace interior in the clean room are designed for easy cleaning. With this configuration even the highest clean room classes can be achieved.

Furnace with Double Door System as lock between Grey Room and Clean RoomLogistics between clean room and grey room can often be easily sorted out. Lock furnaces with one door in the grey room and the other door in the clean room are the perfect choice for these applications. The inner chamber as well as the furnace front in the clean room will be especially designed for lowest particle contamination.

Please contact us if you are looking for a heat treatment solution under clean room conditions. We would be pleased to quote for the oven or furnace model that meets best your requirements.

Clean Room Solutions

Air circulation furnace N 250/65 HAC for clean room Class 100 with charging door to the clean room

KTR 8000 designed as a production furnace in the clean room with filters for air recirculation

Clean/Grey room solution with charging and operating in clean room

Air circulation chamber furnace NAC 120/65 with clean room specs

Hot-wall retort furnace NRA 1700/06 with charging frame for installation in grey room with charging door in clean room

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NBCL 1300

NBCL 2300

The chamber furnaces in the model series NBCL are used for heat cleaning of components. An optimum temperature uniformity is not a priority for these processes. Examples are heat cleaning of electric motors, coated surfaces of steel components or the nozzles of plastic injection molding machines.

The furnaces are gas-fired and have an integrated thermal afterburner system which is also gas-fired. The pre-set, low-oxygen atmosphere in the furnace effectively prevents spontaneous combustion at the workpiece and subsequent damage as a result of over-temperature.

The generated exhaust gases are guided from the furnace chamber into the thermal afterburner where they are incinerated. Depending on the type of exhaust gas involved complete incineration is possible.

For safe operation, the furnace door locks after program start and cannot be opened again until the temperature has dropped below 180 °C at the process end. In case of a burner flame malfunction or gas shortage the process is aborted. In addition, the control system is equipped with an over-temperature limiter with manual reset that is set by the customer at a safe cut-off temperature to switch off the furnace if the limit is exceeded.

The furnaces are not suitable for components and coatings that contain solvents or a high concentration of water. These models must also not be used for charges with low flash points such as wood, paper or wax.

� Tmax 500 °C � Standard sizes with furnace chambers up to 2500 liters � Furnace housing with equipped for safe transport with forklift � Furnace chamber size dimensioned to hold standard lattice boxes � Furnace chamber insulation made of non-classified fiber material, floor and rear wall insulated with lightweight refractory bricks � High performance, atmospheric burner fueled by liquified gas or natural gas � Completely automated temperature controls � Integrated thermal afterburner for exhaust gas cleaning

Chamber Furnaces for Heat Cleaninggas-fired with integrated thermal afterburner

1 Furnace chamber2 Gas heater of the furnace chamber3 Thermal afterburner4 Exhaust hood

Model Tmax Inner dimensions in mm Outer dimensions in mm Burner rating furnace chamber

Burner ratingTNV

°C w d h W D H in kW in kWNBCL 1300 500 1200 900 1000 2160 2310 2450 50 100NBCL 2300 500 1200 1200 1600 2160 2605 3050 100 100NBCL 2500 500 1200 1600 1300 2160 3000 2750 100 100

Gas burners for furnace heating and thermal afterburner

32

S 250/65A

Air Circulation Pit-Type Furnaces Electrically Heated

S 30/45A - S 500/85APit-type furnaces with air circulation offer the advantage of easy charging, for heat treatment of heavy parts or loads in charge baskets. With maximum application temperatures available from 450 °C to 850 °C, these compact furnaces are particularly useful for processes such as tempering, solution annealing, artificial ageing, and soft annealing.

� Tmax 450 °C, 650 °C, 850 °C � Air circulation fans in the furnace bottom, high circulation rate � Vertical air circulation with square air heating chamber � Temperature uniformity up to ∆T 8 K according to DIN 17052-1 see page 64 � Interior walls from stainless steel � Switchgear with solid-state relays � Controls description see page 68

Additional equipment � Charging hoist with swivel arm and charge basket � Optimization of the temperature uniformity up to +/- 2 °C according to DIN 17052-1 see page 64 � Integrated fan for rapid cool down or separate cooling station for retort box cooling outside of the furnace � Retort box with protective gas inlet and outlet for production in a defined atmosphere see page 50 � Manual or automatic gas supply systems for non-flammable protective or reaction gases see page 50

Basket system for charging in different layers

S 120/65A with protective gas retort box and cooling station next to the furnace

S 30/65HA with exchangeable retort and two retort air cooling devices

Model Tmax Inner dimensions in mm Volume Max. char-ging weight

Outer dimensions in mm Heating Electrical Weight

°C w d h in l in kg/m² W D H power in kW³ connection* in kgS 30/45A 450 300 250 400 30 120 750 850 1250 3.6 1-phase 130S 60/45A 450 350 350 500 60 120 800 950 1350 6.6 3-phase 225S 120/45A 450 450 450 600 120 120 900 1050 1450 9.6 3-phase 280S 250/45A 450 600 600 750 250 250 1050 1200 1600 19.0 3-phase 750S 500/45A 450 750 750 900 500 250 1200 1350 1750 28.0 3-phase 980

S 30/65A 650 300 250 400 30 120 750 850 1250 6.0 3-phase¹ 130S 60/65A 650 350 350 500 60 120 800 950 1350 9.6 3-phase 225S 120/65A 650 450 450 600 120 120 900 1050 1450 13.6 3-phase 280S 250/65A 650 600 600 750 250 250 1050 1200 1600 21.0 3-phase 750S 500/65A 650 750 750 900 500 250 1200 1350 1750 31.0 3-phase 980

S 30/85A 850 300 250 400 30 120 600 740 1000 6.0 3-phase¹ 130S 60/85A 850 350 350 500 60 120 800 950 1350 9.6 3-phase 225S 120/85A 850 450 450 600 120 120 900 1050 1450 13.6 3-phase 280S 250/85A 850 600 600 750 250 250 1050 1200 1600 21.0 3-phase 750S 500/85A 850 750 750 900 500 250 1200 1350 1750 31.0 3-phase 980¹Heating only beetween two phases *Please see page 70 for more information about supply voltage³Depending on furnace design connected load might be higher 33

S 1000/85A

S 1780/60AS

S 100/60A - S 1000/85ADue to their robust design, these pit-type furnaces with air circulation are particularly useful for a professional heat treatment demanding optimum temperature uniformity. Production processes such as tempering, solution annealing, artificial ageing, and soft annealing can be realized with these pit-type furnaces.

Model Tmax Inner dimensions cond. cylinder

Volume Max. char-ging weight

Outer dimensions in mm Heating Electrical Weight

°C Ø in mm h in mm in l in kg/m² W D H power in kW1 connection* in kgS 100/..A 450 600 100 1500 1100 1200 1600 17.5 3-phase 1000S 200/..A 600 800 200 1500 1200 1300 2050 28.5 3-phase 1300S 300/..A 600 600 1000 300 1500 1200 1300 2250 39.5 3-phase 1500S 500/..A or 800 1000 500 1500 1400 1600 2400 52.5 3-phase 1600S 600/..A 850 800 1200 600 1500 1400 1600 2600 62.5 3-phase 1800S 800/..A 1000 1000 800 1500 1600 1800 2400 70.0 3-phase 1900S 1000/..A 1000 1300 1000 1500 1600 1800 2700 90.0 3-phase 2200

1Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage

Air Circulation Pit-Type Furnaces Electrically Heated or Gas-Fired

� Tmax 600 °C or 850 °C � Useful for heavy charge weights � Air circulation fans in the furnace lid, high circulation rate

� Heating chamber with air baffle cylinder � Heating elements on all wall surfaces � Distribution of air flow through grid at the furnace floor � Pneumatic or hydraulic lid lifting device � Temperature uniformity up to ∆T 6 K according to DIN 17052-1 see page 64 � Controls description see page 68

Additional equipment � Integral fan for fast cooling � Optimization of the temperature uniformity up to +/- 2 °C according to DIN 17052-1 see page 64 � Variable rpm converter control of the air circulation velocity for sensitive parts � Multiple zone control or special air circulation system for optimum temperature uniformity tailored to the charge � Charge weights up to 7 tons � Designed for Tmax 950 °C, fan blade driven indirectly via a belt to protect the air recirculation motor against over-heating � Process control and documentation with Controltherm MV software package see page 69

2 x S 5600/75 AS in production

Motor-driven air-inlet and exhaust air flaps

34

S 1512/85HAS

Pit-Type and Top-Loading Furnaces with or without Air Circulation Electrically Heated or Gas-Fired

Our top-loading furnaces are perfectly suited for the heat treatment of longer or heavier components. The furnace is usually charged with a factory crane. Due to their high-performance air recirculation system, the furnaces provide for excellent temperature uniformity up to a maximum temperature of 850 °C. The top-loading furnaces for the temperature range up to 1280 °C provide for very good temperature uniformity due to their five-side heating. Alternatively, these furnaces can also be provided with gas heating. Customized dimensions are designed and produced to accomodate the size and weight of the components to be treated.

� Tmax 260 °C, 450 °C, 600 °C or 850 °C for furnaces with air recirculation � Tmax 900 °C or 1280 °C for furnaces with radiant heating � Electrically heated or gas-fired � Heating from both long sides for furnaces with air recirculation � Heating from all four sides and the floor with SiC plates in the floor as level stacking support for models to bis 900 °C or 1280 °C � High-quality insulation, adapted to the specific maximum temperature � Electrohydraulic opening system of the lid with two-hand operation � Closable air supply vents in the lower area of the furnace chamber � Closable exhaust air flaps in the lid � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment � Motor-driven exhaust air flaps for faster cooling � Controlled fan cooling with motor-driven exhaust air flaps � Multi-zone control of the heating provides for optimum temperature uniformity � Furnace chamber can be devided in length for short workparts, partitions can be controlled separately � Designed for Tmax 950 °C, fan blade driven indirectly via a belt to protect the air recirculation motor against over-heating � Process control and documentation with Controltherm MV software package see page 69

S 5120/GS1, furnace chamber divided in two sections, split cover

Furnace chamber S 5120/GS with recepta-cle for an insulating plate in order to devide the furnace chamber

S 4100/S for sintering of high parts35

Air Circulation Bogie Hearth Furnaces Electrically Heated or Gas-Fired

The air circulation bogie hearth furnaces W 1000/60A - W 8300/85A are used when heavy charges weighing up to more than 25 t have to be heat-treated. They are ideal for

processes such as solution annealing, artificial ageing, annealing or soft annealing, for which a high degree of temperature uniformity is crucial. The

high-performance air circulation assures that the temperature uniformity achieved throughout the usable space is outstanding. A broad selection of additional equipment enables these furnaces to be optimally

adapted to suit specific processes.

� Tmax 600 °C or 850 °C � Dual shell housing with rear ventilation provides for low shell temperatures for the 850 °C models � Swing door hinged on the right side � Heating from chrome steel heating elements for the 600 °C models � Heating from three sides (both side walls and the trolley) for the 850 °C models � High-performance air circulation fan with vertical circulation � Temperature uniformity up to ∆T 10 K according to DIN 17052-1 see page 64 � Bottom heating protected by SiC tiles on the bogie providing level stacking surface for the 850 °C models

W 4000/60AS with charging basket made of 1.4828

Air circulation bogie hearth furnace W 5290/85 AS with annealing box for heat treatment of coils under protective gas

Cooling fan for accelerated cooling

Charge support in an air circulation bogie hearth furnace for 850 °C

Air circulation bogie hearth furnace for heat-treating coils

� Furnace chamber fitted with inner sheets made of stainless steel 1.4301 for 600 °C models and of 1.4828 for 850 °C models � Insulation structured with high-quality mineral wool for 600 °C models � Insulation made of high-quality, non-classified fiber material for 850 °C models � Bogies with flanged wheels running on rails for easy and precise movement of heavy loads

36

W 10430/85AS

� Electric chain-driven bogie in combination with rail operation for smooth movement of heavy loads from model W 4800 � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment � Direct gas heating or upon request with indirect gas heating with radiation tube � Electric chain-driven bogie in combination with rail operation for smooth movement of heavy loads up to Model W 4000 � Optimization of the temperature uniformity up +/- 3 °C according to DIN 17052-1 see page 64 � Bogie running on steel wheels with gear rack drive, no rails in front of the furnace necessary � Different possibilities for an extension to a bogie hearth furnace system: - Additional bogies - Bogie transfer system with parking rails to exchange bogies running on rails or to connect multiples furnaces - Motor-driven bogies and cross-traversal system - Fully automatic control of the bogie exchange

� Electro-hydraulic lift door � Motor-driven exhaust air flaps, adjustable via the program � Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap � Multi-zone control adapted to the particular furnace model provides for optimum temperature uniformity in the 850 °C models � Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization � Designed for Tmax 950 °C, fan blade driven indirectly via a belt to protect the air recirculation motor against over-heating � Process documentation and control with Controltherm MV software package, NTLog and NTGraph or Nabertherm Control Center (NCC) for monitoring, documentation and control see page 68

W 13920/60AS4 with floor grid for heavy loads


W 1000/.. A 800 1600 800 1000 1800 2390 2305 50.0 3-phaseW 1600/.. A 1000 1600 1000 1600 2000 2390 2535 50.0 3-phaseW 2200/.. A 1000 2250 1000 2200 2000 3040 2535 95.0 3-phaseW 3300/.. A 600 1200 2250 1200 3300 2200 3040 2745 95.0 3-phaseW 4000/.. A or 1500 2250 1200 4000 2500 3040 2780 120.0 3-phaseW 4800/.. A 850 1200 3300 1200 4800 2200 4090 2780 120.0 3-phaseW 6000/.. A 1500 3300 1200 6000 2500 4090 2900 156.0 3-phaseW 6600/.. A 1200 4600 1200 6600 2200 5390 2770 152.0 3-phaseW 7500/.. A 1400 3850 1400 7500 2400 4640 2980 154.0 3-phaseW 8300/.. A 1500 4600 1200 8300 2500 5390 2780 203.0 3-phase

1Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage 37

W 6430/S1

W 8250/S

Bogie Hearth Furnaces Electrically Heated

W 1000/G - W 10000For annealing and hardening of larger parts, for example heavy cast parts or tool steel dies to temperatures between 800 °C and 1100 °C, we recommend our bogie hearth furnaces with radiation heating. The bogie can be loaded outside the furnace. When the design includes an electro-hydraulic lift door and a motorized bogie, the furnace can be opened while hot and the load can be removed for cooling or quenching. When several bogies are used together with a second door or bogie transfer system, one bogie can be loaded outside the furnace while the other bogie is in the furnace. This shortens process times and the residual energy of the furnace can be used when the new charge is heated.

� Tmax 900 °C or 1280 °C � Dual shell housing with rear ventilation, provides low shell temperatures � Swing door hinged on the right side � Heating from five sides (four sides and bogie) provides for a optimum temperature uniformity � Bogie heating receives power via blade contacts when driven in � Heating elements mounted on support tubes provide for free radiation and long service life � Bottom heating protected by SiC tiles on the bogie providing level stacking surface � Multi-layer insulation consisting of lightweight refractory bricks backed by microporus silica insulation

W 2200/S with exchangeable table system

38

� Self-supporting and long-life ceiling construction with bricks laid in arched construction � Bogies with flanged wheels running on rails for easy and precise movement of heavy loads � Adjustable air inlet damper � Manual exhaust air flap on the furnace roof � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment � Fiber insulation for short heating time requirements � Electric chain-driven bogie in combination with rail operation for smooth movement of heavy loads � Bogie running on steel wheels with gear rack drive, no rails in front of the furnace necessary � Different possibilities for an extension to a bogie hearth furnace plants:

- Additional bogies - Bogie transfer system with parking rails to exchange bogies running on rails or to connect multiples furnaces - Motor-driven bogies and cross-traversal system - Fully automatic control of the bogie exchange

� Electro-hydraulic lift door � Motor-driven exhaust air flap, switchable via the program � Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap � Multi-zone control adapted to the particular furnace provides model for optimal the temperature uniformity � Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization � Process documentation and control with Controltherm MV software package, NTLog and NTGraph or Nabertherm Control Center (NCC) for monitoring, documentation and control see page 68

W 3300 with chain drive

Bogie hearth furnace with gas box for non-flammable protective or reaction gases 39

W 6340S

Bogie Hearth Furnaces Electrically Heated

Combi furnace plants consisting of two furnaces W 5000/H and two additional bogies incl. bogie transfer system and incl. necessary park rails


W 1000/G 900 800 1600 800 1000 1470 2400 1820 40 3-phase 3000W 1500/G 900 900 1900 900 1500 1570 2700 2010 57 3-phase 3500W 2200/G 900 1000 2200 1000 2200 1670 3000 2120 75 3-phase 4000W 3300/G 900 1000 2800 1200 3300 1670 3600 2320 110 3-phase 5300W 5000/G 900 1000 3600 1400 5000 1670 4400 2520 140 3-phase 7500W 7500/G 900 1000 5400 1400 7500 1670 6200 2520 185 3-phase 9100W 10000/G 900 1000 7100 1400 10000 1670 7900 2520 235 3-phase 11000

W 1000 1280 800 1600 800 1000 1470 2400 1820 57 3-phase 3000W 1500 1280 900 1900 900 1500 1570 2700 2010 75 3-phase 3500W 2200 1280 1000 2200 1000 2200 1670 3000 2120 110 3-phase 4000W 3300 1280 1000 2800 1200 3300 1670 3600 2320 140 3-phase 5300W 5000 1280 1000 3600 1400 5000 1670 4400 2520 185 3-phase 7500W 7500 1280 1000 5400 1400 7500 1670 6200 2520 235 3-phase 9100W 10000 1280 1000 7100 1400 10000 1670 7900 2520 300 3-phase 11000

1Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage40

Bogie Hearth Furnaces Gas-Fired

Gas-fired bogie hearth furnaces distinguish by their unique efficiency. The use of high-speed burners allows for short heating times. The burners are arranged according to the furnace geometry providing for a optimum temperature uniformity. Depending on the furnace dimensions, the burners can alternatively be equipped with recuperator technology to save energy. The high-quality, long-life fiber insulation with storage capacity provides for short heating and cooling times.

� Tmax 1300 °C � Powerful, sturdy high-speed burner with pulse control and special flame control in the furnace chamber provide for optimum temperature uniformity � Operation with city gas, natural gas or liquified gas � Fully automatic PLC control of the temperature as well as monitoring of the burner function � Reduction-resistant fiber insulation with low heat storage provides for short heating and cooling times � Dual shell housing provides for low outside temperatures � Exhaust hood with fittings for further discharge of the exhaust gases � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment � Automatic lambda control to set the furnace atmosphere � Exhaust air and exhaust gas piping � Recuperator burners utilizing part of the waste heat in the exhaust tract to preheat the combustion air and considerably contribute to energy saving � Thermal or catalytic exhaust cleaning systems � Process documentation and control with Controltherm MV software package, NTLog and NTGraph or Nabertherm Control Center (NCC) for monitoring, documentation and control see page 68 � Other additional equipment for bogie hearth furnaces see pages 39

Bogie hearth furnace WB 14880S

Combi furnace plant consisting of one gas-fired furnace WB 11000HS and two additional bogies incl. bogie transfer system and incl. necessary park rails

Furnace chamber with eight high-speed burners

41

NB 4330/S

NB 2880/S

Chamber Furnaces, also for Heat Cleaning Gas-Fired

NB 300 - NB 600Certain heat treatment processes require a gas-fired chamber furnace. Short heating times due to the high power are a convincing argument. The chamber furnaces with powerful atmospheric gas burners cover a wide variety of these processes. In the basic version the burners are manually ignited once at the start of the process. The automatic control system then takes over control of the temperature curve. At program end, the burners are automatically switched off. Depending on the process, the furnaces can be equipped with automatically controlled fan burners and safety technology for debinding. Depending on the model, these furnaces can be upgraded with fully automatic fan burners and additional accessories.

� Tmax 1300 °C � Powerful, atmospheric burners for operation with liquified gas or natural gas � Special positioning of the gas burners with flame guide top-down provides for optimum temperature uniformity � Fully automatic temperature control � Gas fittings with flame control and safety valve in accordance with DVGW (German Technical and Scientific Association for Gas and Water) � Multi-layer, reduction-proof insulation with light-weight refractory bricks and special back-up insulation result in low gas consumption � Self-supporting and rugged ceiling, bricks laid in arched construction or as fiber insulation � Dual shell housing, side panels made of stainless steel (NB 300), for low outside temperatures � Solid, double-walled door � Exhaust hood with 150 mm (NB 300) and 200 mm (NB 440, NB 600) diameter connection � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment � Fan burner with fully automatic control � Exhaust air and exhaust gas piping � Thermal or catalytic exhaust cleaning systems � Recuperator technology for heat recovery see page 59 � Process documentation and control with Controltherm MV software package, NTLog and NTGraph or Nabertherm Control Center (NCC) for monitoring, documentation and control see page 68Compact burners for standard models up

to NB 600

NB 2304/S with integrated thermal after-burner for hot cleaning of painted parts

42

N 41/H

N 7/H

Chamber Furnaces, also for Heat Cleaning Gas-Fired

N 7/H - N 641/13These universal chamber furnaces with radiation heating have been specifically designed to withstand heavy-duty use in the heat treatment shop. They are particularly useful for processes such as tool making or for hardening jobs, e.g. annealing, hardening and forging. With help of various accessories, these furnaces can be customized to your application requirements.

� Compact, robust design � Three-sides heating: from both side walls and bottom � High-quality, free-radiating heating elements mounted on support tubes for longest service life � Bottom heating protected by heat conducting SiC tiles � Parallel guided downward swinging door (user protected from heat radiation) � Stainless steel upper door jamb protects furnace structure when furnace is opened hot � Exhaust opening in the side of the furnace, or on back wall of furnace in the N 31/H models and higher � Temperature uniformity up to ∆T 20 K according to DIN 17052-1 see page 64 � Low energy consumption due to multi-layer insulation � Gas spring dampers provide for easy door opening and closing � Heat resistant zinc paint for protection of door and door frame (for model N81 and larger) � Controls description see page 68

Additional equipment see page 44/45

Chamber Furnaces Electrically Heated

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Heating Electrical Weight°C w d h in l W D H power in

kW³connection* in kg

N 7/H¹ 1280 250 250 120 7 720 640 510 3.0 1-phase 60N 11/H¹ 1280 250 350 140 11 720 740 510 3.6 1-phase 70N 11/HR¹ 1280 250 350 140 11 720 740 510 5.5 3-phase² 70N 17/HR¹ 1280 250 500 140 17 720 890 510 6.4 3-phase² 90

N 31/H 1280 350 350 250 30 840 1010 1320 15.0 3-phase 210N 41/H 1280 350 500 250 40 840 1160 1320 15.0 3-phase 260N 61/H 1280 350 750 250 60 840 1410 1320 20.0 3-phase 400N 87/H 1280 350 1000 250 87 840 1660 1320 25.0 3-phase 480

N 81 1200 500 750 250 80 1140 1900 1790 20.0 3-phase 820N 161 1200 550 750 400 160 1180 1930 1980 30.0 3-phase 910N 321 1200 750 1100 400 320 1400 2270 2040 47.0 3-phase 1300N 641 1200 1000 1300 500 640 1690 2670 2240 70.0 3-phase 2100

N 81/13 1300 500 750 250 80 1220 1960 1840 22.0 3-phase 900N 161/13 1300 550 750 400 160 1260 1990 2030 35.0 3-phase 1000N 321/13 1300 750 1100 400 320 1480 2330 2090 60.0 3-phase 1500N 641/13 1300 1000 1300 500 640 1770 2730 2290 80.0 3-phase 2500¹Table-top model *Please see page 70 for more information about supply voltage²Heating only beetween two phases 3Depending on furnace design connected load might be higher

N 27/HS for forging with pneumatic door movement and radiation curtain

N 312 with charging stacker

43

N 2349S

These very rugged chamber furnaces with radiation heating are designed for continuous heat-treatment processes. They are ideally suited for forming processes such as forging or hot forming steel sheets. The use of a wide variety of accessories enables these furnaces to be tailored to the relevant application.

� Tmax 1200 °C � Very rugged design � Heating from three sides (both sides and the floor) � Heating elements installed on ceramic support tubes enable unimpaired heat radiation � Bottom heating protected by heat-conducting SiC plate � Manual lift door for models to N 951 � Electro-hydraulic lift door for models from N 1296 � Heating operated with low-wear semi-conductor relay (for models to 60 kW) see page 43 � Temperature uniformity up to ∆T 20 K according to DIN 17052-1 see page 64 � Closable measuring port for customer's temperature measuring system � Holding time measurement for the charge until it goes to forging or forming of steel sheets: After charging, the operator presses a key and the previously defined holding time for the load begins to run. The end of the holding time is indicated by both acoustic and optical signals, meaning that the charge can be removed. � Heat resistant zinc paint for protection of door and door frame � Controls description see page 68

Additional equipment � Other temperatures on request � SiC plates to protect the wall heating elements � Electro-hydraulic lift door for models to N 951 � Protective gas ports in combination with silicone sealing of the chamber � Annealing boxes for powder nitriding, annealing and hardening under non-flammable protective or reaction gases � Loading devices and charging aids � Charging grates for heavy loads � Cooling fan in combination with motor-driven exhaust air flaps in the top of the furnace

Door heating element as additional equip-ment

N 6080/13S preheating furnace for forging; with door-in-door

Chamber Furnaces Electrically Heated

Annealing furnace with electro-hydraulic lift door on transportable base for preheating of large steel sheets for the automotive industry.

44

N 1491/S in production

� Heating elements also in door and rear wall for optimized temperature uniformity up to +/- 7,5 °C according to DIN 17052-1 see page 64 � Commissioning of the furnace with test firing and temperature uniformity measurement using 11 thermocouples including record of the measurement results � Furnace chamber with optional heating elements in the ceiling when used for preheating of sheetmetal plates � Process control and documentation with Controltherm MV software package see page 69

Furnace chamber with optional heating elements in the ceiling when used for preheating of sheetmetal plates

N 761 with annealing box and charging cart


N 731 1200 750 1300 750 730 1800 2400 2890 72 3-phaseN 761 1200 800 1900 500 760 1740 2700 2650 72 3-phaseN 891 1200 800 1400 800 890 1740 2200 3450 72 3-phaseN 951 1200 1000 1900 550 950 2060 2700 2780 72 3-phaseN 1296 1200 1800 1200 600 1296 2860 2000 3020 75 3-phaseN 1491 1200 1660 1200 750 1490 2720 2000 3350 115 3-phaseN 1501 1200 1000 1500 1000 1500 2060 2300 3845 100 3-phaseN 1601 1200 1600 2000 500 1600 2660 2900 2900 115 3-phaseN 1760 1200 2200 1600 500 1760 3400 2500 2900 115 3-phaseN 1771 1200 1400 1400 900 1770 2460 2200 3745 115 3-phaseN 2161 1200 1700 1700 750 2160 2760 2600 3350 115 3-phaseN 2201 1200 1000 2200 1000 2200 2060 3000 3845 155 3-phaseN 2251 1200 2500 1500 600 2250 3560 2300 3020 115 3-phaseN 2401 1200 2500 1200 800 2400 3560 2000 3445 115 3-phase

1Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage

45

Lift-Top Furnaces Electrically Heated

H 125/LB or LT - H 3000/LB or LTLift-top furnaces have the advantage that they are highly accessible for charging. The heating from all four sides and the table provides for very uniform temperatures. The basic furnace is equipped with a fixed table under the hood. The system can be expanded by adding one or several exchangeable tables which can be driven manually or motorically. Another option is to remove the hood completely with a shop crane. In such cases, the furnace heating system has a plug-in power supply.

� Tmax 1200 °C � Dual shell housing with rear ventilation for low shell temperatures � Electrohydraulically driven hood with fixed table � Five-sided heating from all four sides and from the table provides for a temperature uniformity up to ∆T 20 K according to DIN 17052-1 see page 64 � Heating elements mounted on support tubes provide for free radiation and long service life of the heating wire

Lift-top furnace system with three exchangeable tables and protective gas boxes for heat treatment with non-flammable protective or reaction gases

Lift-top furnace with recesses for extending charges

H 1000/S with table changing system

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� Bottom heating protected by SiC tiles which provide for a level stacking surface � Multi layer insulation consisting of lightweight refractory bricks backed by special insulation � Long-life ceiling design with fiber insulation � Manual exhaust air flap on the furnace roof � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment � Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap � Multi-zone control adapted to the particular furnace provides model for optimal the temperature uniformity � Additional tables, table changing system, also automatically driven � Hood, removable by customer's crane, hood heating connected with plug-in power supply � Commissioning of the furnace with test firing and temperature uniformity measurement using 11 thermocouples including record of the measurement results � Process documentation and control with Controltherm MV software package, NTLog and NTGraph or Nabertherm Control Center (NCC) for monitoring, documentation and control see page 68


H 125/LB, LT 1200 800 400 400 125 1330 1280 1900 12 3-phase 1250H 250/LB, LT 1200 1000 500 500 250 1530 1380 2100 18 3-phase 1400H 500/LB, LT 1200 1200 600 600 500 1730 1480 2300 36 3-phase 1800H 1000/LB, LT 1200 1600 800 800 1000 2130 1680 2700 48 3-phase 2800H 1350/LB, LT 1200 2800 620 780 1360 3690 1700 2750 75 3-phase 3500H 3000/LB, LT 1200 3000 1000 1000 3000 4000 2100 3200 140 3-phase 62001Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage

HG 5208/S with exchangable table for heat treatment of large parts and charging the oven with the help of a shop crane.

HG 2000, standard version

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Charging Devices and Accessories for Chamber and Bogie Hearth Furnaces

Semi automatic heat treatment plant with two furnaces N 250/65HA, each equipped with pneumatic lift door and movable roller conveyor for easy furnace unloading.

By upgrading a furnace with useful accessories and devices for charging, you can considerably accelerate and simplify your heat processing which increases your productivity. The solutions shown on the following pages are only a part of our program, available in this product range. Ask us about accessories you may need. Our team of skilled engineers is prepared to develop a custom solution with you for any particular problem.

Chamber furnace system consisting of two air circulation furnaces N 250/65 HA with pneumatic swing door opening for cooling and convenient furnace charging

N 2380/55 HASAir circulation furnace system with charging cart for sheet metal tempering

Air circulation furnace with charging grill shelves. The shelves can be moved individually on telescoping guides and can be taken out individually.

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Quench Tanks

Subject to process, charge size and weight a customized quench tank will be designed and delivered. Standard sizes are also available. Water, oil or polymer are available as quenching medium. Various examples of different quench tank design as part of manual and fully automatic heat treatment systems are described on page 60

Available quenching mediums: �Water � Oil � Polymer

Design Specifications � Powerful circulation of the quenching medium � Controlled heating systems � Fill-level control � Automatic refill system in case of water as quenching medium � Connection port for customer’s cooling system � Cooling system for the queching medium � Oil separator for quench tanks with water � Protective gas supply on the surface of oil quench tanks as fire protection � Integration of bath temperature in the process control and documentation

Protective gas supply as fire protection

Circulation of quenching mediumPowerful circulation of quenching medium

Quench tank with water integrated in a heat treatment system for aluminium

Oil separator for quench tanks with water

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Our protective gas and carburization modules allow you to upgrade our annealing and hardening furnaces into a compact annealing and hardening system for non-flammable protective or reaction gases as an economical alternative to expensive vacuum systems and protective gas furnaces. We can recommend different systems based on your application. Our professional test center will be pleased to test your product samples in order to specify the right heat treatment equipment for you.

� Annealing BoxOur annealing boxes with lid sealing may be used for carburizing, annealing and hardening in neutral atmospheres, powder nitriding or boriding. Your charge is placed in the box and bedded in carburizing granulate, neutral annealing coal or nitriding or boriding powder. The box is sealed, and when heated, the resulting atmosphere in the closed annealing box provides for the respective surface reaction of the charge. For carburizing and similar processes, the annealing box may be removed while hot, opened and the charge quenched in fluid. For annealing processes, the box may remain in the furnace until it is cooled down.

� Annealing Tray with Alloy BagThis system, consisting of a lightweight tray with gas port and alloy bag, is particularly useful for air-quenched steels. The thin-walled alloy bag allows fast heat transfer. Its protective gas connections allow you to process your charge in a defined atmosphere. The small size of the gas lightweight tray you to pre-flush or cool the unit outside the furnace or place it on a cooling table for fast cooling by fan.

� Annealing Box with Protective Gas Inlet and OutletThe boxes are equipped with lid and protective gas inlet and outlet. The lid is sealed by means of a sealing channel with a high-temperature rope gasket before it is introduced into the furnace. The furnace is equipped with a special passage for the protective gas connections. The box is connected to a gas supply panel to introduce the required atmosphere in the box. When the heating process is finished, the box may be removed from the furnace, the lid removed and the parts quenched in liquid or air.

� Annealing Box with Protective Gas Inlet and Outlet constructed for Evacuation Ambient TemperaturesThis version of our annealing box is designed to be evacuated prior to the heating cycle. After evacuation, the box is refilled with a protective atmosphere for the heating cycle. This system is particularly useful for bright annealing of bulk materials, and nonferrous and noble metals, since oxygen can be more efficiently removed from the box by evacuation than through purging. Temperature-resistant seals allow this version of the annealing box to maintain a vacuum at ambient temperatures.

� Additional AccessoriesNabertherm offers a wide range of hardening accessories for the a.m. heat treatment system. From the simple sealing cord for the gas supply box up to a fully automatic gas supply system , we offer interesting solutions for your problem. Please ask for our catalog Thermal Process Technology II.

Protective Gas and Carburization Systems for Annealing and Hardening

Sophisticated gas supply system

Automatic gas supply system for 2 gases with flow meter and solenoid valves

Sealed annealing box Annealing tray with alloy bag andprotective gas inlet

Annealing box with protective gas inlet and outlet

Annealing box with protective gas inlet and outlet, constructed for evacuation at ambient temperatures

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Powder nitriding in an annealing box Powder carburizing of steel

Protective gas box used in a large bogie hearth furnace with air circulation Annealing box with flap which opens together with the furnace door

Annealing tray with alloy bag Bulk material bright annealing in an annealing box with evacuation facility

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TS 20/15 - TSB 90/80Salt-bath furnaces offer remarkably high temperature uniformity and excellent heat transfer to the work piece. Our salt-bath furnaces TS 20/15 - TSB 90/80 are especially useful for heat-treating of metals in neutral or active salt baths. Processes such as carbonitriding (e.g. Tenifer) up to 600 °C, carburizing up to 950 °C, or bright annealing up to 1000 °C can be realized. In their standard version these furnaces are equipped with safety technology for heat treatment of steel. As addional feature they can be equipped with extended safety technology for heat treatment of light metals.

� Tmax 750 °C or 1000 °C in the salt bath � Safety technology according to EN 60519-2 � Useful for heat treatment of steel � Bath temperature control � Electric (TS) all-round heating or gas heating (TSB) � Removable collar plate made of solid steel � Insulated swing-a-way lid � Temperature uniformity up to ∆T 4 K according to DIN 17052-1 in the bath see page 64 � Over-temperature limiter with manual reset in the furnace chamber to prevent dangerous conditions for the furnace or personnel � Bath control of salt bath and furnace chamber

Crucibles � Type P: low carbon steel, CrNi plated and corundum coated for carburizing baths up to 950 °C, neutral salt and annealing baths up to 850 °C � Type C: high alloy CrNi steel for neutral salt and annealing baths up to 1000 °C and for dip brazing of Aluminium

Additional equipment � Exhaust gas collection at rim for connection to an exhaust system � Enhanced safety systems for heat treatment of aluminium and magnesium in the salt bath with second over-temperature limiter with manual reset controller and PLC-bath control with thermocouples in the salt bath and in the furnace chamber

Salt-Bath Furnaces for Heat Treatment of Steel or Light Metals Electrically Heated or Gas-Fired

TS 40/30, electrically heated

TSB 30/30, gas-fired

Model Tmax Inner dimensions crucible Volume Outer dimensions in mm Heating Electrical Weight°C² Ø in mm h in mm in l W D H power in kW1 connection* in kg¹

TS 20/15 750 230 500 20 850 970 800 17 3-phase 650TS 30/18 750 300 500 30 950 1070 800 20 3-phase 700TS 40/30 750 400 500 60 1050 1170 800 33 3-phase 750TS 50/48 750 500 600 110 1150 1270 970 53 3-phase 1000TS 60/63 750 610 800 220 1250 1370 1170 70 3-phase 1200TS 70/72 750 700 1000 370 1350 1470 1370 80 3-phase 1500TS 90/80 750 900 1000 500 1600 1700 1400 100 3-phase 1700

TS, TSB 20/20 1000 230 500 20 850 970 800 22 3-phase 650TS, TSB 30/30 1000 300 500 30 950 1070 800 33 3-phase 700TS, TSB 40/40 1000 400 500 60 1050 1170 800 44 3-phase 750TS, TSB 50/60 1000 500 600 110 1150 1270 970 66 3-phase 1000TS, TSB 60/72 1000 610 800 220 1250 1370 1170 80 3-phase 1200TS, TSB 70/90 1000 700 1000 370 1350 1470 1370 100 3-phase 1500TS, TSB 90/80 1000 900 1000 500 1600 1700 1400 120 3-phase 1700

¹Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage²Salt bath temperature

Exhaust gas collection at crucible rim as additional equipment

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Salt-bath hardening in practice

Martempering Furnaces using Neutral Salts Electrically Heated

QS 20 - QS 400QS 20 - QS 400 martempering furnaces are filled with neutral salt and offer remarkably rapid and intensive heat transmission to the workpiece while ensuring optimum temperature uniformity. For working temperatures at between 180 °C and 500 °C these furnaces are ideal for quenching or cooling with minimal workpiece distortion, retempering, austempering for optimal toughness, recrystallization annealing after electrical discharge machining (EDM) and for blueing.

The quenching or cooling process is applied in order to achieve an even temperature uniformity throughout the workpiece's entire cross-section before the formation of martensite and to avoid distortion and formation of cracks in valuable mechanical components during the subsequent hardening process.

Tempering in a martempering bath is the same as the tempering process in air circulation furnaces and is used to reduce a previously hardened workpiece to a desired hardness, to increase toughness and reduce stress within the workpiece.

Austempering is a good choice to achieve a high level of toughness and dimensional accuracy in oil hardened low-alloy steels. Workpieces subject to austempering have high tensile strength and good elasticity.

� Tmax 500 °C � Optimal temperature uniformity � Martemper bath temperature control � Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load � Heating with immersion heating elements � Charging basket

Additional equipment � Charging aid mounted on side of furnace � Process control and documentation with Controltherm MV software package see page 69

Double martempering bath


QS 20 500 300 210 460 20 610 580 920 2.6 1-phase 110QS 30 500 300 210 580 30 610 580 920 3.2 1-phase 140QS 70 500 400 300 680 70 750 680 980 7.5 3-phase 240QS 200 500 540 520 880 200 900 900 1200 18.0 3-phase 660QS 400 500 730 720 980 400 1100 1100 1300 24.0 3-phase 1150¹Anschlusswert je nach Ausführung höher *Please see page 70 for more information about supply voltage

Information about salts by Petrofer and Durferrit and their application

Salt Application Working temperature Commentin °C

AS 135/140 Salt-bath hardening, tempering, austempering

180 - 500 Not for use with workpieces which are heated up to above 950 °C and salts which contain more than 13 % KCN

AS 220/225 Tempering, austempering 250 - 500AS 200/235 Tempering, austempering 280 - 500 Nitrite-free in the as-received conditionAS 200/235 Tempering 340 - 500

QS 30 with charging aid

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Rotary Hearth Furnaces up to 1300 °C with and without Air Circulation Electrically Heated or Gas-Fired

Gear rim drive under the furnace

Exhaust hood above charging opening

The compact furnaces of the DH product line are optimally suited for continuous processes on a small floor space. They are designed for preheating processes such as the preheating of metal parts for forging. Charging and discharging can, be done at one position – either by a person or fully automatic. The hearth rotates in pre-set segments individually reconciled with the workpart geometry. The rotational speed and rotational intervals can be defined by the control system or by manual switching.

The rotary hearth furnaces are specifically designed for the required throughput and charge dimensions. They are heated electrically or alternativelly gas-fired by means of powerfull gas burners. Subject to the temperature range these furnaces are equipped with or without air circulation.

� Tmax 1100 °C, 1200 °C or 1300 °C without air circulation � Tmax 260 °C, 600 °C or 850 °C with air circulation �Wire heating elements in the furnaces ceiling for furnaces up to 1200 °C � SiC heating rods in the furnace ceiling for furnaces up to 1300 °C � Gas heating as an alternative to electrical heating � Models for 650 °C and 850 °C with powerful air circulation for better heat transfer onto the charge and to optimize the temperature uniformity � Very compact design compared with continuous furnaces � Designed for continuous operation at one working temperature � Table diameter up to 3000 mm � Hearth movement in defined segments � Low-vibration movement of the rotary hearth � Parallel swivel door � Motor-driven or rotational motion initiated by foot switch � Furnace floor can be lowered using a forklift truck for maintenance purposes

Rotary table with base plates made of highly heat-resistant steel to protect the insulation

Rotary hearth furnace DH 3020/1480/450/11, movable on rails, for preheating of molds for two forges

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Rotary hearth furnace DH 1200/-/300/11

Additional equipment � Exhaust hood above the door opening for discharge of the warm exhaust air when door is open � Pneumatic drive of the parallel swivel door � Charging aids for ease of loading and unloading � Multi-zone control for adjustable thermal profile during the cycle � Protective gas connections � Process control and documentation with Controltherm MV software package see page 69

Pre-heating of steel rings for forging

Furnace floor can be lowered for mainte-nance purposes

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Heating Electrical Weight°C Ø Outer Ø Inner h in l W D H power in kW1 connection* in kg

DH 1200/-/300/11 1100 1200 0 300 340 2200 2200 2500 54.0 3-phase 1000DH 1500/800/250/11 1100 1500 800 250 630 2400 2300 2450 21.0 3-phase 1500DH 3020/1480/450/11 1100 3022 1480 450 2500 4000 4000 2500 98.0 3-phase 3500¹Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage

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Continuous furnace D 700/10000/300/45S with chain conveyor for 950 °C, gas-fired

Continuous FurnacesElectrically Heated or Gas-Fired

Service window

Discharge of D 650/S

Roller conveyor furnace N 650/45 AS for heat treatment of heavy workparts

Continuous belt furnace for bulk materials in baskets

Continuous furnaces are the right choice for processes with fixed cycle times such as drying or pre-heating, curing or degassing, etc.. The furnaces are available for various temperatures up to a maximum of 1000 °C. The furnace design depends on the required throughput, the process requirements for heat treatment and the required cycle time. The conveyor technology (e.g. belt, rollers) is tailored to the required working temperature and the geometry of the charge. The conveyor speed and the number of control zones are defined by the process specifications.

Alternative furnace design subject to process specifications:

Conveyor concepts � Conveyor belt � Metal conveyor belt with adjusted mesh gauges � Drive chain � Roller conveyors � Pusher-type furnace

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Heating systems � Electric heating, radiant or convection � Direct or indirect gas-firing � Infrared heating � Heating with the use of external heat sources

Temperature cycles � Control of working temperature across the whole length of the furnace, such as for drying or pre-heating � Automatic control of a process curve applying defined heat-up, dwell and cooling time � Control of a temperature curve including a final quenching of the charge

Process atmosphere � In air � In non-flammable protective or reactive gases such as nitrogen, argon or forming gas � In flammable protective or reactive gases such as hydrogen incl. the necessary safety technology

Basic configuration criteria � Conveyor speed � Temperature uniformity � Operating temperature � Process curve � Charge space width � Charge weights � Cycle time or throughput � Length of charge and discharge zone � Generated exhaust gases � Specific industry standards such as AMS, CQI-9, FDA etc. � Other individual customer requirements

Semiautomatic conveyor plant D 1600/3100/1200/55, consisting of annealing furnace, cooling station and conveyor system

Visualization of process data on the PC

Drop bottom for quenching within 5 seconds

Water bath and tilt mechanism for removing the rivet

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D 20/S - D 320/SThese models are particularly suitable for continuous heat treatment at operation temperatures up to 1200 °C. The modular design allows adjustment to different length and width requirements. The heating elements are mounted on only one side of the furnace and can be changed individually during operation. Optimum temperature uniformity is achieved by means of a multiple zone control system tailored to the furnace dimensions.

Wire and Strand Annealing Furnaces

Strand annealing furnace D 390/S

Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Heating Electrical°C w d h in l W D H power in kW1 connection*

D 20/S 1200 400 1000 50 20 900 1200 1350 9 3-phaseD 30/S 1200 600 1000 50 30 1100 1200 1350 12 3-phaseD 50/S 1200 200 3600 50 50 700 4000 1150 15 3-phaseD 60/S 1200 200 5600 50 60 700 6000 1350 36 3-phaseD 70/S 1200 350 3600 50 70 850 4000 1100 36 3-phaseD 110/S 1200 480 4600 50 110 980 5000 1450 36 3-phaseD 130/S 1200 650 3600 50 130 1150 4000 1150 60 3-phaseD 180/S 1200 480 7600 50 180 980 8000 1350 80 3-phaseD 250/S 1200 950 5600 50 250 1400 6000 1350 80 3-phaseD 320/S 1200 850 7600 100 320 1400 8000 1350 160 3-phase¹Depending on furnace design connected load might be higher *Please see page 70 for more information about supply voltage

D 250/S in production

Wire-drawing furnaces based on a tube furnace with a length of 6 meters

� Tmax 1200 °C � Modular design, variable length � Small outer dimensions due to efficient microporous silica insulation � Special heating elements that can be changed during operation � Heating from the ceiling � Optimum temperature uniformity by means of multiple zone control � Controls description see page 68

Additional equipment � Gas supply systems for non-flammable or falmmable protective or reaction gases including hydrogen in the muffle tubes, with burn off torch and safety technology � Process and charge documentation � Double chamber furnace system with parallel chambers for simultaneous operation at different temperatures

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Energy Efficiency Technology

In face of rising energy prices and stricter environmental regulations there is increasing demand for heat treatment systems with greater energy efficiency.

Depending on the furnace size and the process there is always a certain amount of potential energy which can be recovered from the waste heat and re-used. This is especially true for large furnace systems or long process times which allow for huge energy savings that the additional investment has a short pay-back time. The thermal energy from finished charges can also be used to pre-heat cold charges which is also an efficient way of saving energy.

The following examples outline engineering alternatives for heat recovery:

Heat ExchangersThe principle of the counterflow heat exchanger is to use the hot exhaust gas coming from the furnace to pre-heat the cold fresh air channelled into the furnace. In many cases, there is no need anymore for a separate fresh air preheating unit. Such a system is recommended if the process requires continuous air exchange in the furnace chamber, such as when tempering silicone, or during drying processes that are covered by the EN 1539 industrial standard.

Recuperator BurnersLarge gas-heated heat-treatment furnaces are especially advantageous for the installation of recuperator burners. Recuperator burners also use hot exhaust gas; to pre-heat the combustion air. Depending on the furnace model and the process, substantial energy savings of as much as 25% can be realized by using recuperator burners so that there is a short pay-back time for the additional purchase costs.

Heat Transfer ChambersHeat transfer chambers, which can also be described as cooling/heating chambers, offer two enormous advantages. For one, they help save energy, and for another, using a heat transfer chamber increases productivity.

The load is removed from the furnace while it is still hot and placed in the heat transfer chamber. The chamber also has room for a new, cold charge. Circulating the air cools the hot charge and, at the same time, preheats the cold charge before it is put into the furnace. Consequently, the furnace heating does not have to provide the thermal energy and through-put capacitiy of the furnace is increased of the same time.

The above systems for enhancing energy efficiency are only a few examples of technical alternatives. We would be happy to advise you on whether an additional heat recovery module would also be a sensible add-on to your furnace or system.

Counterflow heat exchanger for the air cir-culation chamber furnace N 2560/26 ACLS

Recuperator burner for aluminum melt-ing furnace 16 x TBR 110/12 and 2 x TBR 180/12

Heat transfer between a hot and a cold charge

Production system, consisting of four chamber dryers for moving the load during heat treatment along with a three-stage heat exchanger to optimize energy ef-ficiency

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Tempering Plants for Steel and NE-Metals

Fully automatic tempering system for aluminum with 2 pit furnaces, water bath, and 6 parking places

Removal of the charge basket from solution annealing and transfer to water bath

PC interface for central operation

Fully Automatic Tempering System with Air Circulating Pit-Furnace S 1780/65 AS for SolutionAnnealing, Water Bath, Lift Conveyor and Pit Furnace S 3180/26AS for Artificial Aging

This tempering system is available for the tempering of aluminum parts with a quenching time of 30 seconds. All functional processes are fully automated. Both, the solution annealing and the artificial aging furnaces are designed as pit furnaces.

To save time, the conveyor unit picks-up the lid of the solution annealing furnace after solution annealing, along with the attached load basket and transports it to the water bath. The lid is then unlinked and conveyed back to the solution annealing furnace. After quenching, the basket is parked in a free spot.

The subsequent artificial aging process also takes place in a pit furnace. Due to the longer period needed for artificial aging, the artificial aging furnace is equipped for the introduction of two baskets, while the solution annealing furnace can only handle one.

The entire heat treatment, including all movements, is fully automated. The PLC controls handle all movement and locking processes. The system automatically detects occupied parking spaces and furnaces and starts the programmed processes according to priority. Charge documentation takes place on an ongoing basis, that is, the loaded basket is documented from the time it is loaded into a parking place until removal after the end of the process.

Systems design � Pit furnace S 1780/65 AS for solution annealing of one basket, Tmax 650 °C, volume 1780 liters � Pit furnace S 3180/26 AS for artificial aging of two baskets, Tmax 260 °C, volume 3180 liters �Water bath with powerful circulation and heating, along with control of the water temperature � Linear lift conveyor for all movement processes � PLC controls with Nabertherm Control Center (NCC) for temperature regulation, control of all movements, and parallel batch documentation � 6 parking spots with automatic occupancy detection, loading with forklift � Safety fence around the entire system

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Fully automated tempering system with two air circulating bogie hearth furnaces, quench bath, conveyor system, and par-king spots for five charge baskets

Fully Automated Heat Treatment System with Air Circulating Bogie Hearth Furnace W 2780/60 AS for Solution Annealing, W 2780/26 AS for Artificial Aging, Lift Conveyor, and Heated Water Bath

This tempering system is available for the tempering of T6 aluminum alloys with a quenching time of 10 seconds. All functional processes are fully automated. Both the solution annealing furnace and the artificial aging furnace are mounted on a platform and are designed as bogie hearth furnaces. After solution annealing, the conveyor unit positions itself in front of the furnace, the door opens, the bogie moves out, and the basket is automatically picked-up by the lift conveyor. The bogie moves back into the furnace and the load is quenched in the water bath underneath.

After the quenching process, the basket is lifted back out of the water bath, drips off, and is conveyed to the artificial aging furnace. After artificial aging, the lift conveyor transports the basket to a free parking spot.

The entire heat treatment, including all movements, is fully automated. The PLC controls handle all movement and locking processes. The system automatically detects occupied parking spaces and furnaces and starts the program-med processes according to priority. Charge documentation takes place on an ongoing basis, that it, the loaded basket is documented from its process start in the parking space until removal after the end of the process.

System Design � Bogie hearth furnace W 2780/60 AS for solution annealing, Tmax 600 °C, volume 2780 liters � Bogie hearth furnace W 2780/26 AS for artificial aging, Tmax 260 °C, volume 2780 liters �Water bath with powerful circulation and heating, along with control of the water temperature � Linear lift conveyor for all movement processes � PLC controls with Nabertherm Control Center (NCC) for temperature regulation, control of all movements, and parallel batch documentation � 5 parking spots with automatic occupancy detection, loading with forklift � Safety fence around the entire system

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Heat Treatment Systems for Steel and NE-Metals

Bogie hearth furnace W 7440/26 AS for solution annealing and water bath WB 24000/S for quenching

2 x S 3570/65 AS for solution annealing

Water bath with powerful circulation pump

Manual Heat Treatment System with Two Air Circulating Pit Furnaces S 3570/65 AS for Solution Annea-ling, Water Bath, Bogie Hearth Furnace W 7440/26 AS for Artificial Aging

This tempering system was built for the tempering of aluminum parts for automaotive industry. The movement processes are performed manually using the customer's crane. These solution annealing furnaces are designed as pit furnaces, while the artificial aging furnace is a bogie hearth furnace.

Solution annealing of the components takes place in two pit furnaces with 3570 liter furnace chambers. After the solution annealing process is concluded, the lid of the furnace is opened pneumatically, the basket is removed using the crane, and it is placed into the water bath. For better quench results, the water bath is equipped with a powerful circulation pump.

After quenching, the operator uses the crane to move the load onto the bogie of furnace W 7440/26 AS for artificial aging. The bogie hearth furnace is equipped with a chain-driven bogie which is moved out of the furnace electrically. The furnace is dimensioned to accept the loads from both solution annealing furnaces.

The furnace has PLC controls for temperature measurement and charge documentation. Every load can be assigned a name or a charge number, which is then stored along with the date.

System Design � 2 pit furnaces S 3570/65 AS for solution annealing of one basket each, Tmax 650 °C, volume 3570 liters � Bogie hearth furnace W 7440/26 AS for artificial aging of two baskets, Tmax 260 °C, volume 7440 liters �Water bath with powerful circulation and heating, along with control of the water temperature � PLC controls with Nabertherm Control Center (NCC) for charge documentation

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Manual Heat Treatment System for Steel with Top-Hat Furnace H 4263/12S and Water Bath

This tempering system is available for the tempering of 8 meter steel profiles with a quenching time of 30 seconds. The furnace is a top-hat furnace which is loaded with a crane. After heat treatment, the operator positions the crane with attached C-hook in front of the furnace. The furnace is electrohydraulically opened by the operator at 1150 °C and the bogie is moved out of the furnace.

The charge holder on the bogie and the C-hook are designed in such a way that the charge is positioned into the C-hook directly when the bogie drives out. The crane only needs to lift it up. The operator then moves the material over the water bath and lowers it for quenching. After the quenching process, the basket is lifted back out of the water bath, drips dry, and is manually placed onto a free parking spot with the crane.

The system has PLC controls for temperature measurement and charge documentation. Every load can be assigned a name or a charge number, which is then stored along with the date.

System Design � Top-hat furnace H 4263/12S, Tmax 1200 °C, volume 4260 liters, electrohydraulic hood drive, chain drive for bogie �Water bath with powerful circulation � PLC controls with Nabertherm Control Center (NCC) for temperature regulation and charge documentation � Safety fence around the entire system

Moving furnace table and material under the C hook of the crane

Quenching of steel bars in water

Annealing system with top-hat furnace H 4263/12S and water bath

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Temperature Uniformity and System Accuracy

Holding frame for measurement of tempe-rature uniformity

The system accuracy is defined by adding the tolerances of the controls, the thermo-couple and the useful space

Deviation from measuring point to the average temperature in the useful chamber +/-3 °C

Deviation of thermocouple, e.g. +/- 1.5 °CPrecision of the controls, e.g. +/- 2 °C

Temperature uniformity is defined as the maximum temperature deviation in the useful space of the furnace. There is a general difference between the furnace chamber and the useful space. The furnace chamber is the total volume available in the furnace. The useful space is smaller than the furnace chamber and describes the volume which can be used for charging.

Specification of Temperature Uniformity in ∆ K in the Standard FurnaceIn the standard design the temperature uniformity is specified as the relative, maximum deviation from a defined reference temperature within the useful space in the empty furnace at dwell time. Temperature uniformity is defined as ∆T in K. If, for example, a standard temperature uniformity of ∆T 10 K at 750 °C is specified, it means that the actual temperature in the furnace can vary between 740 °C and 750 °C or between 750 °C and 760 °C.

Specification of the Temperature Uniformity in +/- °C as Additional FeatureIf an absolute temperature uniformity at a reference temperature or at a defined reference temperature range is required, the furnace must be calibrated appropriately. If, for example, a temperature uniformity of +/- 5 °C at a set temperature of 750 °C is required, it means that measured temperatures may range from a minimum of 745 °C to a maximum of 755 °C in the useful space.

System AccuracyTolerances may occur not only in the useful space, they also exist with respect to the thermocouple and in the controls. If an absolute temperature uniformity in +/- °C at a defined set temperature or within a defined reference temperature range is required, the following measures have to be taken:

� Measurement of total temperature deviation of the measurement line from the controls to the thermocouple � Measurement of temperature uniformity within the useful space at the reference temperature or within the reference temperature range � If necessary, an offset is set at the controls to adjust the displayed temperature at the controller to the real temperature in the furnace � Documentation of the measurement results in a protocol

Temperature Uniformity in the Useful Space incl. ProtocolIn standard furnaces a temperature uniformity is guaranteed as ∆T without measurement of temperature uniformity. However, as additional feature, a temperature uniformity measurement at a reference temperature in the useful space compliant with DIN 17052-1 can be ordered. Depending on the furnace model, a holding frame which is equivalent in size to the charge space is inserted into the furnace. This frame holds thermocouples at 11 defined measurement positions. The measurement of the temperature uniformity is performed at a reference temperature specified by the customer at a pre-defined dwell time. If necessary, different reference temperatures or a defined reference working temperature range can also be calibrated.

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Standards such as the AMS 2750 E (Aerospace Material Specifications) are applicable for the industrial processing of high-quality materials. They define industry-specific requirements for heat treatment. Today, the AMS 2750 E and derivative standards such as AMS 2770 for the heat treatment of aluminum are the guidlines for the aerospace industry. After the introduction of the CQI-9, the automotive industry has also committed to submit heat treatment processes to stricter rules. These standards describe in detail the requirements applicable to thermal processing plants.

� Temperature uniformity in the charge space (TUS) � Instrumentation (definition of measurement and control systems) � Calibration of the measurement system (IT) from the controller via the measurement line to the thermocouple. � Inspections of system accuracy (SAT) � Documentation of the inspection cycles

Norm compliance is necessary to ensure that the required quality standard of the manufactured components can also be reproduced in series. For this reason, extensive and repeated inspections as well as controls of the instrumentation, including the relevant documentation, are required.

Furnace Class and Instrumentation Requirements of the AMS 2750 EDepending on the quality requirements of heat treatment job the customer specifies instrumentation type and the temperature uniformity class. The instrumentation type describes the necessary combination of the applied control, recording media as well as thermocouples. The temperature uniformity of the furnace and the class of the selected instrumentation are defined based on the required furnace class. The higher the requirements are set for the furnace class the more precise the instrumentation must be.

AMS 2750 E, NADCAP, CQI-9

Measurement set-up in a high-temperature furnace

Measurement set-up in an annealing furnace

Instrumentation Type Furnace class

Temperature uniformityA B C D E °C °F

Each control zone has a thermocouple connected to the controller x x x x x 1 +/- 3 +/- 5Recording of the temperature measured by the control thermo-couple x x x x 2 +/- 6 +/- 10

Sensors for recording the coldest and hottest spots x x 3 +/- 8 +/- 15Each control zone has a charge thermocouple with recording system x x 4 +/- 10 +/- 20Each control zone has an over-temperature protection unit x x x x 5 +/- 14 +/- 25

6 +/- 24 +/- 50

Regular InspectionsThe furnace or the heat treatment system must be designed so that the requirements of the AMS 2750 E can be met and be reproduced. The standard also requires the inspection intervals for the instrumentation (SAT = System Accuracy Test) and the temperature uniformity of the furnace (TUS = Temperature Uniformity Survey). The SAT/TUS tests must be performed by the customer with measuring devices and sensors which operate independently of the furnace instrumentation.

Nabertherm ServicesThe suitable furnace model for the corresponding heat treatment can be designed based on the process, the charge, the required furnace class and the type of instrumentation. Depending on the required specs, alternative solutions can be offered.

� Furnace designs, which meet standards, following customer specifications regarding furnace class and instrumentation, incl. gauge connections for repeated customer inspections at regular intervals. No consideration of requirements with respect to documentation � Data recording devices (e.g., temperature recorder) for TUS and/or SAT measurements see page 68 � Data recording, visualization, time management via the Nabertherm Control Center (NCC), based on Siemens WinCC software see page 68 � Commissioning at site, incl. the first TUS and SAT inspection � Connection of existing furnace systems to meet norm requirements � Documentation of the complete process chain in line with the corresponding norm

65

Implementation of AMS 2750 EBasically, two different systems are available for control and documentation, a proven Nabertherm system solution or instrumentation using Eurotherm controllers/temperature recorders. The Nabertherm AMS package is a convenient solution that includes the Nabertherm Control Center for control, visualization, and documentation of the processes and test requirements based on PLC control.

Instrumentation with Nabertherm Control Center (NCC) for Control, Visualization, and Documentation based on a Siemens PLC Controls

The attractive feature of the instrumentation with Nabertherm Control Center in combination with PLC controls of the furnace is the convenient data input and visualization. The software programming is structured in a way that both the user and the auditor can navigate it without difficulty.

In daily use, the following product characteristics stand out:

� Very easy to navigate and straight-forward presentation of all the data in plain text on the PC � Automatic saving of the charge documentation at the end of the program � Administration of the calibration cycles in the NCC � Results of the measurement distance calibration are entered in the NCC � Schedule management of the required testing cycles including a reminder function. The testing cycles for TUS (Temperature Uniformity Survey) and SAT (System Accuracy Test) are entered in days and monitored by the system and the operator or tester is informed in time about up-coming tests. The values of the tests are entered directly into NCC and saved as PDF files on the PC. There are no additional tasks involved in documenting the tests. � Option of transferring the measurement data to a customer's server

Example of a design with Type A Nabertherm Control Center

Furnace chamber

Usable space

Control thermocouple

Over-temperature limiter with manual

reset

Thermocouple for the highest temperature

Thermocouple for the lowest temperature

Furnace

Charge thermocouple

Nabertherm Control Center

The Nabertherm Control Center can be extended to enable a complete documentation of the heat treatment process apart from just the furnace data. For example, when heat-treating aluminum, in addition to the furnace, the temperatures in the quenching basin or a separate cooling medium can also be documented.

AMS 2750 E, NADCAP, CQI-9

66

TUS module with ports for 16 thermo-couples and PROFIBUS connection to the Nabertherm Control Center

Example of a design containing Type D Eurotherm instrumentation

Recorder Controller

Controlling thermocouple

Over-temperature limiter with manual reset

Furnace

N 12012/26 HAS1 according to AMS 2750 E

Instrumentation for TUS Measurements as a Separate Model

The TUS standard requires that the temperature uniformity of the furnace be tested with a TUS measurement at regular intervals. This measurement must be performed by an independent measurement system and not by the instrumentation used for process control. The testing intervals are filed in the NCC in days. The system reminds in time that a test must be performed.

This test can be performed either using an independent temperature recorder (see page 68) with the customer's calibrated testing thermocouples or using the Nabertherm TUS module that is connected to the Nabertherm Control Center as a separate module.

The TUS module has its own PLC which converts the measurement results of the testing thermocouples. The evaluation, including an easy-to-navigate and simply log function, is then performed via the furnace's Nabertherm Control Center.

Alternative Instrumentation with Temperature Controllers and Recorders from Eurotherm

As an alternative to instrumentation with the Nabertherm Control Center (NCC) and PLC controls, instrumentation with controllers and temperature recorders is also available. The temperature recorder has a log function that must be configured manually. The data can be saved to a USB stick and be evaluated, formatted, and printed on a separate PC. Besides the temperature recorder, which is integrated into the standard instrumentation, a separate recorder for the TUS measurements is needed (see page 68).

67

Nabertherm has many years of experience in the design and construction of both standard and custom control system. All controls are remarkable for their ease of use and even in the basic version have a wide variety of functions.

Standard ControllersOur extensive line of standard controllers satisfies most customer requirements. Based on the specific furnace model, the controller regulates the furnace temperature reliably. The standard controllers are developed and fabricated within the Nabertherm group. When developing controllers, our focus is on ease of use. From a technical standpoint, these devices are custom-fit for each furnace model or the associated application. From the simple controller with an adjustable temperature to the control unit with freely configurable control parameters, stored programs, PID microprocessor control with self-diagnosis system and a computer interface, we have a solution to meet your requirements.

Mains Voltages for Nabertherm Furnaces1-phase: all furnaces are available for mains voltages from 110 V - 240 V at 50 or 60 Hz.3-phase: all furnaces are available for mains voltages from 200 V - 240 V or 380 V - 480 V, at 50 or 60 Hz.

Assignment of Standard Controllers to Furnace Families

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Catalog page 10 12 12 13 14-18 18/19 20 22 26 28 32 33 34 35 38 41 42 43 43 44 46 52 53 54 58ControllerP 300 l l ¡ ¡ ¡ ¡ ¡ l l ¡ ¡ ¡ ¡ l ¡

P 310P 330 ¡

R 6 lB 130 lB 150 l l l l l l l l lB 180 ¡

C 280 ¡

3208/C 6 ¡ ¡ ¡ ¡ ¡ ¡ ¡ l l3504 ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ lH 700/PLC l l³ ¡

H 1700/PLC ¡ l ¡ ¡ ¡ ¡ l ¡ ¡ ¡ ¡ l³ ¡ ¡ ¡ ¡ ¡

H 3700/PLC ¡ l ¡ ¡ l ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡

NCC ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡ ¡

Functionality of the Standard Controllers R 6 C6 3216 3208 B 130 B 150 B 180 C 280 P 300 P 310 P 330 3504 H 700 H 1700 H 3700 NCCNumber of programs 1 1 1 2 1 1 9 9 9 9 25 1/104 10 10 50Segments 1 2 8 3 2 2 3 40 40 40 5004 20 20 20 20Extra functions (e.g. fan or autom. flaps) 2 2¹ 2¹ 2 2-84 ¡4 6/24 8/24 16/44

Maximum number of control zones 1 1 1 1 1 1 1 1 1 1 1 21,2 ¡4 8 8 8Drive of manual zone regulation lCharge control/bath control ¡ ¡ ¡ ¡ ¡

Auto tune l l l l l l l l l lGraphic color display 5,7" 5,7" 12" 19“Status messages in clear text l l l l l l l l l l l l lData input via number pad l l l lData entry via touchpanel l l lKeypad lock l l l lSkip-button for segment jump l l l ¡ l l lProgram entry in steps of 1 °C or 1 min. l l l l l l l l l l l l l l lStart time configurable (e.g. to use night power rates) l l l l l l l l l l lSwitch-over °C/°F ¡ ¡ ¡ l l l l l l l ¡ l4 l4 l4 l4

kWh meter l l l l l l lOperating hour counter l l l l l l l l l l lProgrammable power outlet lReal-time clock l l l l lNTLog Comfort for HiProSystems: Recording of process data on an external storage medium ¡ ¡

NTLog Basic for Nabertherm Controller: Recording of process data with USB-flash drive ¡ ¡ ¡ ¡ ¡ ¡ ¡

Interface for MV software ¡ ¡ ¡ ¡ ¡ ¡ ll Standard¡ Option¹ Not for melt bath control² Control of additional separate slave regulators possible3 As an extra feature in ovens with air circulation4 Depending on the design

Process Control and Documentation

68

PC for HiProSystems control in a separate cabinet

H 3700 with colored graphic presentation of data

H 1700 with colored, tabular depiction of the data

Temperature recorder

HiProSystems Control and DocumentationThis professional control system for single and multi-zone furnaces is based on Siemens hardware and can be adapted and upgraded extensively. HiProSystems control is used when more than two process-dependent functions, such as exhaust air flaps, cooling fans, automatic movements, etc., have to be handled during a cycle, when furnaces with more than one zone have to be controlled, when special documentation of each batch is required and when remote telediagnostic service is required. It is flexible and is easily tailored to your process or documentation needs.

Alternative User InterfacesTouch panel H 700This basic panel accommodates most basic needs and is very easy to use.Touch panel H 1700Firing cycle data and the extra functions activated are clearly displayed in a table. Messages appear as text.Touch panel H 3700All functions and process data are stored and displayed in easy to read charts. The data can be exported through various interfaces (Ethernet TCP/IP, MPI, Profibus) to a local PC or your company network for further processing. A CF card also gives the opportunity for data storage and transfer to a PC with a card reader.

For Control, Visualisation and DocumentationNabertherm Control Center NCCUpgrading the HiProSystems-Control individually into an NCC provides for additional interfaces, operating documentation, and service benefits in particular for controlling furnace groups including charge beyond the furnace itself (quenching tank, cooling station etc.):

� Recommended for heat treatment processes with extensive requirements in respect to documentation e.g. for metals, technical ceramics or in the medicine field � Software can be used also in accordance with the AMS 2750 E (NADCAP) � Documentation according to the requirements of Food and Drug Administration (FDA), Part 11, EGV 1642/03 possible � Charge data can be read in via barcodes � Interface for connection to existing Enterprise Database systems (e.g. SAP, Oracle) � Connection to mobile phone network for alarm message transmission via SMS � Control from various locations over the network � Calibration of each measuring point for a specific temperature possible � Extendable for calibration of a polygonal line with up to 18 temperatures per measuring point for use at different temperatures e.g for AMS 2750 E applications

For DocumentationNabertherm Documentation Center NDC and data recording via NTLogIf the process data of the HiProSystems control unit only need to be recorded, this can be done using a personal computer (PC) with the high-performance NDC software. The data are documented, forgery-proof, and can be evaluated both in the form of a table or a chart. Individual charge data can be entered by the customer and are archived together with the process data. A low-cost alternative which can be used is the NTLog package. The data is recorded on a USB stick during the firing. After the heat treatment has been completed, the recorded value can be read out on the PC with the free analysis software.

Temperature RecorderBesides the documentation via the software which is connected to the controls, Nabertherm offers different temperature recorders which can be used with respect to the application.

Model 6100e Model 6100a Model 6180aData input using touch panel x x xSize of colour display in inch 5.5 5.5 12.1Number of thermocouple inputs 3 18 48Data read-out via USB-stick x x xInput of charge data x xEvaluation software included x x xApplicable for TUS-measurements acc. to AMS 2750 E x

69

Documentation of Nabertherm Controller – Extension Module NTLog/NTGraph BasicThe extension module NTLog Basic is an economical way to record process data using the respective Nabertherm Controllers (P 300/310/330, B 130/150/180, C 280, all from version 3.0) on a USB stick. For this purpose the controller is enhanced with an intelligent interface adapter to accommodate a USB stick.

The process documentation with NTLog Basic requires no additional thermocouples or sensors. Only data recorded which are available in the controller via the control thermocouple (difference instead of real-time, program segment no., temperature setpoint, temperature actual value, control function 1, control function 2) is recorded.

The data stored on the USB stick (up to 16,000 data records, format CSV) can afterwards be evaluated on the PC either via NTGraph or a spreadsheet software used by the customer (e.g. MS Excel). Process data is stored with a differential time and not with an absolute time stamp. Charge data, start time and start date are assigned later (e.g. in the spreadsheet software or with the file name) by the operator at the PC.

For protection against accidental data manipulation the generated data records contain checksums. A retrofit of NTLog Basic on existing controllers can be done with a retrofit kit including a manual.

Documentation of PLC Controls with Touch Panel H 1700 or H 3700 - Extension Module NTLog/NTGraph ComfortThe extension module NTLog Comfort offers the same functionality of NTLog Basic module. Process data from a Siemens PLC Controller is read out from Touch Panel H 1700 or H 3700 and stored in real time on a USB stick. The extension module NTLog Comfort can also be connected using an Ethernet connection to a computer in the same local network so that data can be written directly onto this computer.

Process Data from NTLogThe process data from NTLog can be presented either using the customer‘s own spreadsheet program (e.g. MS Excel) or NTGraph. With NTGraph Nabertherm provides for a user-friendly tool free of charge for the visualization of the data generated by NTLog. Prerequisite for its use is the installation of the program MS Excel (version 2003/2010). After data import presentation as diagram, table or report can be chosen. The design (color, scaling, reference labels) can be adapted by using eight prepared sets.

NTGraph is available in seven languages (DE/EN/FR/SP/IT/CH/RU). In addition, selected texts can be generated in other languages.

NTLog Basic for data recording of Naber-therm Controllers

NTLog Comfort for data recording of a Siemens PLC

NTGraph, a freeware for the easy-to-read analysis of recorded data using MS Excel

70

Controltherm MV Software for Control, Visualisation and DocumentationDocumentation and reproducibility gain increased attention with steadily rising quality standards. The powerful Nabertherm software Controltherm MV provides for an optimum solution for the control and documentation of one or more furnaces as well as charge data on basis of Nabertherm controllers.

In the basic version one furnace can be connected to the MV-software. The system can be extended to four, eight or even 16 multi-zone controlled furnaces. Up to 400 different heat treatment programs can be stored. The process will be documented and filed. Process data can be read-out graphically or in table format. A data transfer to MS-Excel is also possible.

For furnaces which are not controlled via a Nabertherm controller, the furnace temperature can be documented with the MV-software. We deliver an extension package as optional equipment. With respect to the individual version, three, six or even nine independent thermocouples can be connected. Independent of the control system, the values of each thermocouple will be read-out and evaluated by the MV-software.

Features � Simple installation without specific knowledge � Suitable for PC with operating system Microsoft Windows 7 (32 Bit), Vista (32 Bit), XP with SP3, 2000, NT4.0, Me, 98 � All Nabertherm controllers with interface connectable � Manipulation protected storage of temperature curves of up to one, four, eight or 16 furnaces (also multizone-controlled), depending on the version of MV-software � Redundant storage on a network server possible � Programming, archiving and printing of programs and graphics � Free input of descriptive charge data text with comfortable search function � Data exportable into Excel format for further evaluation � Start/stop of the controller from the local PC (only with Nabertherm controllers mit interface) � Selectable languages: German, English, French, Italian or Spanish � 400 additional programs storable (only with Nabertherm controllers with interface)

Extension Package II for Connection of one Additional Temperature Measuring Point, Independent of the Controller

� Connection of an independent thermocouple, type K or S with display of the measured temperature on the included controller C 6 D, e.g. for documentation of charge temperature � Conversion and transmission of measured data to the MV-software � For data evaluation, please see MV-software features

Extension Package II for Connection Three, Six or Nine Temperature Measuring Points, Independent of the Controller

� Connection of three thermocouples, type K, S, N or B to the supplied connection box � Extendable to two or three connection boxes for up to nine temperature measuring points � Conversion and transmission of measured data to the MV-software � For data evaluation, please see MV-software features

Controltherm MV Software for Control, Visualisation and Documentation

Data input in table format if used together with Nabertherm controllers

Graphical display of set and actual tempe-rature curve

Extendable for connection of up to 16 furnaces

71

www.nabertherm.comwww.nabertherm.com

Please visit our website www.nabertherm.com and find out all you want to know about us - and especially about our products.

Besides news and our current calendar of trade fairs, there is also the opportunity to get in touch directly with your local sales office or nearest dealer worldwide.

Professional Solutions for: � Arts & Crafts � Glass � Advanced Materials � Laboratory � Dental � Thermal Process Technology for Metals, Plastics and Surface Finishing � Foundry

The whole World of Nabertherm: www.nabertherm.com

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[email protected]: (+49) 4298 922-0Fax: (+49) 4298 922-129

[email protected]: (+86) 21 6490 2960Fax: (+86) 21 6490 3107


[email protected]: (+39) 348 3820278Fax: (+39) 055 480835




[email protected]: (+34) 93 474 47 16Fax: (+34) 93 474 53 03

Headquarters:

Nabertherm GmbHBahnhofstr. 2028865 Lilienthal, Germany

Sales and Service Subsidiaries

Nabertherm Ltd. (Shanghai)150 Lane, No. 158 Pingbei Road, Minhang District201109 Shanghai, China

Nabertherm SAS51 Rue de Presles93531 Aubervilliers, France

Nabertherm Italiavia Trento N° 1750139 Florence, Italy

Nabertherm Schweiz AG Batterieweg 64614 Hägendorf, Switzerland

Nabertherm Ltd.Vigo Place, AldridgeWest Midlands WS9 8YB, United Kingdom

Nabertherm Inc.54 Read‘s WayNew Castle, DE 19720, USA

Nabertherm Españac/Marti i Julià, 8 Bajos 7a

08940 Cornellà de Llobregat, Spain

ad

ERT Morada

www.nabertherm.com

MadeinGermany

FurnacesProtective Gas BoxesHardening SystemsQuenching BathsCharging PlatesTongsGlovesCharging BasketsOther Accessories

Thermal Process TechnologyAnnealing, Hardening, Brazing, Forging, Nitriding

ad

ERT

Made in GermanyNabertherm with 350 employees worldwide have been developing and producing industrial furnaces for many different applications for over 60 years. As a manufacturer, Nabertherm offers the widest and deepest range of furnaces worldwide. 150,000 satisfied customers in more than 100 countries offer proof of our commitment to excellent design, quality and cost efficiency. Short delivery times are ensured due to our complete inhouse production and our wide variety of standard furnaces.

Setting Standards in Quality and ReliabilityNabertherm does not only offer the widest range of standard furnaces. Professional engineering in combination with inhouse manufactoring provide for individual project planning and construction of tailor-made thermal process systems with material handling and charging systems. Complete thermal processes are realized by customized system solutions.

Innovative Nabertherm control technology provides for precise control as well as full documentation and remote monitoring of your processes. Our engineers apply state-of-the-art technology to improve the temperature uniformity, energy efficiency, reliability and durability of our systems with the goal of enhancing your competitive edge.

Global Sales and Service Network – Close to youCentralized engineering and manufacturing and decentralized sales and service define our strategy to live up to your needs. Long term sales and distribution partners in all important world markets ensure individual on-site customer service and consultation. There are various reference customers in your neighborhood who have similar furnaces or systems.

Large Test Center for CustomersWhat furnace is the right choice for this specific process? This question cannot always be answered easily. Therefore, we have set up our modern test center which is unique in respect to size and variety. A representative number of furnaces is available for tests for our customers.

Customer Service and Spare PartsOur professional service engineers are available for you world-wide. Due to our complete inhouse production, we can despatch most spare parts from stock over night or produce with short delivery time.

Experience in Many Fields of Thermal ProcessingIn addition to products for Heat Treatment, Nabertherm offers a wide range of standard furnaces and systems for many other thermal processing applications. The modular design of our products provides for customized solutions to your individual needs without expensive modifications.

�

Contents

PageAnnealing, Hardening, Carburizing, Boriding, Forging, Nitriding, Brazing Chamber Furnaces with Radiation Heating .............................................................................5 Charging Plates, Hardening Boxes ..............................................................................6 Neutral Annealing Coal, Carburizing Powder and Granulate .............................................7 Nitriding Powder and Activator, Boriding Powder ...........................................................7

Stainless Steel Heat Treating Foil to avoid Surface Reactions ....................................................8 Annealing and Hardening Treating Foils ........................................................................8 Accessory Equipment for Processing Bags, Envelopes and Foils ......................................8 Annealing Envelopes, Annealing Bags ..........................................................................9

Protective Gas Operation Protective Gas Annealing Bag and Holder ................................................................... 10 Protective Gas Boxes .............................................................................................. 11 Protective Gas Boxes with Additional Vacuum Lid ........................................................ 1� Vacuum Pump ........................................................................................................ 13 Protective Gas Boxes with Hinged Lids....................................................................... 13 Protective Gas Boxes with Hinged Lids which remain in the Furnace ............................... 14 Protective Gas Systems ........................................................................................... 15 Measuring Temperatures in Protective Gas Systems ..................................................... 16

Tool Shop Hardening Systems ............................................................................................ 17 SHS 41 Protective Gas Hardening System ............................................................................ 19 Cooling Platforms ............................................................................................................. �0 Quenching and Cleaning Baths ........................................................................................... �0 Hardening Oil, Quench Water Additive, Detergent, Insulating Materials..................................... �1 Draw Hook, Binding Wire, Hardening Tongs, Gloves ............................................................... �� Heat-Resistant Face Mask ................................................................................................. ��

Tempering, Solution Annealing, Artificial Aging, Soft Annealing, Brazing Chamber Furnaces with Air Circulation ................................................................................ �3 Protective Gas Boxes .............................................................................................. �4 Protective Gas Boxes with Vacuum Lid ....................................................................... �4 Pit-Type Furnaces with Air Circulation .................................................................................. �5 Charging Aid .......................................................................................................... �6 Protective Gas Boxes .............................................................................................. �6 Charging Baskets ................................................................................................... �7

Salt Bath and Bath-Type Annealing, Tempering and Austempering Martempering Furnaces using Neutral Salt ........................................................................... �8 Salt-Bath Furnaces using Neutral or Active Salt .................................................................... �9

Charging Devices Charging Trolley ............................................................................................................... 30 Charging Stacker ............................................................................................................. 30

Hardness Tester ........................................................................................................................ 31

Experience in using different Materials ..................................................................................... 3�

The Nabertherm Product Range ................................................................................................ 33

Steel Selection .............................................................................................. 34

3

As a manufacturer of electrically and gas heated furnaces for heat treatment, Nabertherm offers a wide range of accessory equipment and consumable materials required for heat treatment.

The MHS 17 hardening system shown on page 17, featuring an oil and water bath as well as an air quenching system, is suitable for occasional applications. This system can be extened to a full-scale hardening shop using a minimum of space. The basis for annealing are the furnace models N 7/H - N 17/HR and for tempering, the circulation air furnace N 15/65 HA.

Multitherm N 31/H - N 81 chamber furnaces as well as Multitherm N 30/45 - N 1�0/85 HA circulation air furnaces are suitable for hardening and tempering of medium-sized workpieces. In addition to oil and water baths, charging aids can also be supplied for these models. The semi-automated SHS 41 protective gas hardening system is suitable for annealing under protective gas and quenching in oil.

For large-format workpieces we recommend furnaces N 161 - N 1491 and N �50/45 - N 500/85 HA. There are also charging aids available for these models. Quenching baths are custom manufactured and designed to fit the process.

Protective gas boxes and bags can be used to prevent oxidation and decarburizng of the steel during heat treatment. These are flushed with protective gases such as argon, nitrogen or forming gas 95/5 and thus force the oxygen out of the containers. The systems required and their corresponding furnaces and boxes, are described in detail. If there is no protective gas available, workpieces can also be wrapped in annealing and hardening foils or packed in annealing envelopes. The foil used binds the enclosed oxygen. If used properly, clean, oxidation-free surfaces are achieved under protective gas as well as enclosed in foil.

Annealing boxes and the required consumables are available for powder nitriding to obtain greater protection against corrosion, for carburizing of low alloy steels, for neutral atmosphere annealing in an oxygen-free atmosphere and for boriding.

For the even quenching of workpieces and for bainitic hardening, Nabertherm supplies bath furnaces with neutral salt for temperatures up to 500 °C. Salt bath furnaces up to 750 °C and 1000 °C are available for heat treatment in active salt baths, for Tenifer nitriding, for carburizing and bright annealing.

There are tongs, face protection, gloves and other equipment available for working at the hot furnace. We can supply a Rockwell hardness tester for testing hardness after treatment.

The furnaces described in this catalog and the accessory equipment available allow many different heat treatment processes which otherwise are only possible using expensive furnace systems. This brochure offers customers the opportunity to assemble their own hardening shop to their own specifications and makes it easy to select required accessory equipment.

Contact Nabertherm at any time for a detailed consultation.

Overview of Heat Treatment Processes

Quenching and TemperingCase HardeningHardeningTemperingSolution AnnealingAging

AnnealingRecovery AnnealingRecrystallization AnnealingStress Relief AnnealingSoft AnnealingNormalizing

Thermal Chemical DiffusionWithout Subsequent Hardening:OxidizingPowder NitridingPowder Boriding

with Subsequent Hardening:Carburizing

4

N 41/H

N 7/HN 7/H - N 1491These universal chamber furnaces with radiation heating are designed for highly adverse conditions during heat treatment. They are ideally suited for tooling construction processes and in the hardening shop, such as annealing, hardening or preheating for forging. The use of various accessories allow these furnaces to be modified for your application.

Standard Features, Table-Top Models N 7/H - N 17/HRCompact, low-cost constructionHeating from floor and both side wallsHeating elements on support tubes ensure free heat radiation and a long service lifeLow energy consumption due to multi-layer insulationCasing made of sheets of textured stainless steel (non-corrosive design)Exhaust air vent mounted on the sideOptimal temperature uniformity up to ΔT �0 K in accordance with DIN 1705�-1Floor heating protected by heat conducting SiC tilesParallel swinging door which opens downward (protection against heat radiation)

Standard Features N 31/H - N 61/H, like models N 7/H - N 17/HR, plusUpper door area amored with stainless steel to avoid burn damageExhaust air vent in rear wall of furnaceDoor movement cushioned by gas springsBase included in delivery

Standard Version N 81/H - N 1491/H, like models N 31/H - N 61/H, exceptDoor movement with counterweight and gas spring; opening upwardModels N 761 + N 1491 equipped with electro-hydraulic lift door

For additional features see separate heat treatment catalog

Chamber Furnaces with Radiation Heating

Article no. Model Tmax Inner dimensions in mm Volume Exterior dimensions in mm Supply Electrical WeightController B 150 Controller C �90 °C w d h in l W D H power/kW connection* in kg001311110 001311190 N 7/H¹ 1�80 �50 �50 1�0 7 7�0 640 510 3,0 1-phase 60001311�10 001311�90 N 11/H¹ 1�80 �50 350 140 11 7�0 760 510 3,6 1-phase 70001311310 001311380 N 11/HR¹ 1�80 �50 350 140 11 7�0 760 510 5,5 3-phase² 70001311510 001311580 N 17/HR¹ 1�80 �50 500 140 17 7�0 890 510 6,4 3-phase² 90

0013�1110 0013�1173 N 31/H 1�80 350 350 �50 30 840 1010 13�0 13,0 3-phase �100013�1�10 0013�1�90 N 41/H 1�80 350 500 �50 40 840 1160 13�0 15,0 3-phase �600013�1310 0013�1395 N 61/H 1�80 350 750 �50 60 840 1410 13�0 �0,0 3-phase 400

1013�0400 1013�0490 N 81 1�00 500 750 �50 80 1140 1900 1790 �0,0 3-phase 8�01013�0500 1013�0590 N 161 1�00 550 750 400 160 1180 1930 1980 30,0 3-phase 9101013�0600 1013�0690 N 3�1 1�00 750 1100 400 3�0 1400 ��70 �040 47,0 3-phase 13001013�0700 1013�0790 N 641 1�00 1000 1300 500 640 1690 �670 ��40 70,0 3-phase �1001013�0800 1013�0890 N 761 1�00 800 1900 500 760 1550 �540 �650 70,0 3-phase �4001013�0900 1013�0990 N 1491 1�00 1660 1�00 750 1490 �430 1840 3150 110,0 3-phase 5400

101330400 101330490 N 81/13 1300 500 750 �50 80 1��0 1960 1840 ��,0 3-phase 900101330500 101330590 N 161/13 1300 550 750 400 160 1�60 1990 �030 35,0 3-phase 1000101330600 101330690 N 3�1/13 1300 750 1100 400 3�0 1480 �330 �090 60,0 3-phase 1500101330700 101330790 N 641/13 1300 1000 1300 500 640 1770 �730 ��90 80,0 3-phase �500

¹Table-top model *Please see page 3� for more information about mains voltage²Heating only between two phases

N 641 with annealing box and lift trolley

5

Charging Plates for Models N 7 - N 641/13

Hardening Boxes for Models N 7 - N 161/13

We recommend this useful accessory equipment for applications up to 1100 °C to protect the furnace floor.

Tmax 1100 °CThree raised edgesHole for draw hook (see page �� for draw hook)Made of heat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)Material thickness 4 mm

Larger plates and custom dimensions available upon request

Article no. Furnace Exterior dimensions in mmW D H

6�8000137 N 7 �15 �90 �56�8000138 N 7/H �40 �90 �56�800013� N 11 �15 390 �56�8000139 N 11/H, N 11/HR, N �1 �40 390 �56�8000140 N 17, N 17/R �15 540 306�8000141 N 17/H, N 17/HR �40 540 306�8000400 N 31/H 340 390 306�8000133 N 41, N 41/H 340 540 306�800014� N 61, N 61/H 340 790 306�8000143 N 81 480 790 306�8000144 N 161 530 790 306�8000145 N 3�1 7�0 1140 306�8000146 N 641 950 1330 30

Article no. Furnace Inner dimensions in mm Exterior dimensions in mm Chargingw d h W D H method

6310001�3 all 104 84 65 140 1�0 90 charging fork6310001�4 all 99 99 75 135 135 100 charging fork6310001�5 all 144 114 95 180 150 1�0 charging fork6310001�6 all 144 169 1�5 180 �05 150 charging fork6310001�7 N 7, N 7/H 114 164 77 150 �00 10� charging fork6310001�8 N 7/H 174 194 93 �10 �30 115 charging fork6310001�9 N 11, N 11/R 174 �44 107 �10 �80 13� charging fork631000130 N 11/H, N 11/HR 184 �94 107 �30 330 13� charging fork631000131 N 17, N 17/R 174 394 107 �10 430 13� charging fork63100013� N 17/H, N 17/HR 194 444 107 �30 480 13� charging fork631000396 N 31/H �44 �94 147 �80 330 17� draw hook631000133 N �1, N 41, N 41/H 194 �94 147 �30 330 17� draw hook631000135 N 41, N 41/H �44 344 177 �80 380 �00 draw hook631000136 N 41, N 41/H �94 394 197 330 430 �� draw hook631000137 N 61, N 61/H �74 494 197 310 530 �� draw hook631000138 N 81 394 494 197 430 530 �� forklift63100031� N 161 456 556 �50 496 596 355 forkliftArticle no. 601603960, 1 set of fiber insulation cord, 5 strips of 610 mm each

Working with Hardening BoxesHardening boxes are made of heat-resistant alloy 314 (AISI)/(DIN material no. 1.4841) and also feature a lid for top charging. A ceramic fiber gasket is inserted in the circular seal profile on the upper edge of the box to seal it. To prevent oxidation during the process, neutral annealing coal is placed in the box. These bind the oxygen in the box at all temperatures. After the heat treatment, the box is removed from the oven, the lid is opened using tongs (page ��) and the workpiece removed. Our hardening boxes are also well suited for brazing.

The boxes can also be used with the appropriate granulate (page 7) for carburizing (also referred to as case hardening or cementing) and for powder nitriding or powder boriding. The workpieces are placed in the box with carburizing granulate or nitriding powder or boriding powder and a suitable activator (page 7).

Tmax 1100 °CHardening box with lid and seal profileLid sealed with ceramic fiber, ceramic insulating materials can alternatively be usedModels up to N 17/HR with manipulating device availableStarting with model N 31/H, with a charging trolley (page 30)Also usable for carburizing and powder nitridingHeat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)

Larger boxes and custom dimensions available upon request

Charging plate

Hardening boxes with lid and granulate

Hardening boxes on stacker

6

Neutral Annealing Coal

For protection of tool steel against oxidation and decarburizing, binds oxygen at all process temperaturesWorkpieces are placed in a hardening box with annealing coalReusable multiple times with addition of approx. �0 % new granulate

Carburizing Powder and Granulate

Workpieces are placed into an annealing box with carburizing powder or granulate and the lid is closed and sealedAt approx. 900°C the steel reacts with the carbon and forms an approx. 0.�-� mm thick layerThe thickness of the layer depends on the length of the process, approx. 0.1 mm/hr, a process time of approx. 6-8 hrs achieves good average resultsPowder for alloyed and non-alloyed steels for single use as well as granulate for multiple use with approx. �0 % new granulate addedSupplied in �5 kg sacks

Nitriding Powder and Activator, Boriding Powder

Workpieces are placed into an annealing box together with the nitriding powder and activator and the lid is closed and sealedPowder nitriding or powder boriding causes a thin cover layer to form against friction wear and fatigue resistance is substantially increasedAt approx. 550 °C an extremely thick cover layer forms (up to 1000 HV) which covers the hardened steel or the carburized edge layer. The activator improves process conditions.The process duration at 550 °C is at least 10 hrsFor all steels and cast iron, such as hot work steel matrices, injection molding dies, wear parts and machine componentsAnti-nitriding paste to protect areas which should not be processed

Boriding powder upon request.

Article no. Description Container491075110 Kratos K 10 kg bucket4910751�5 Kratos K �5 kg sack

Article no. Description491070�50 KG 6 - granulate for alloyed steels and multiple re-use491070�75 KG 30 - granulate for non-alloyed steels and multiple re-use491070300 Kratos L - powder for alloyed steels and single use491070430 Kratos U - powder for non-alloyed steels and single use

Article no. Description Container491010�50 Nitriding powder 80 kg491010150 Activator �5 kg491010100 Activator 5 kg491003000 Anti-nitriding paste 1 kg

Neutral annealing coal

Carburizing granulate

Nitriding powder

7

Single parts requiring protection against decarburizing can be wrapped in a stainless steel heat treating foil off the roll or packed in prepared envelopes or bags. The rolls are available in various lengths and widths, the envelopes and bags are supplied in various dimensions.

Foil off the roll can be cut to size using gold plates scissors and the workpiece can be wrapped to requirements. See page 9 for more details about accessory supplies required, such as tongs and special gloves. The protected workpiece can now be loaded into the heated furnace. Due to the foil's thinness, it takes on the furnace temperature immediately and binds oxygen trapped in the foil packaging. There is then no oxygen present to oxidize the workpiece itself. The workpiece stays clean.

After the appropriate dwell time in the furnace, the wrapped workpiece is immersed in the quenching medium. After quenching the foil is removed and the part is then tempered.

Care should be taken to ensure that the foil is not too close to the workpiece as otherwise the foil may become damaged. If the workpiece should have several openings or gaps, and a large amount of oxygen can be wrapped up, these gaps can be filled in with foil pieces. This increases the foil surface area.

Caution! The foil has very sharp edges. Use gloves and tools.

Stainless Steel Heat Treating Foil to avoid Surface Reactions

Tmax 1�00 °CStainless steel heat treating foil for single useUltra-thin stainless steel heat treating foil for bright annealing of workpieces in all shaps and sizesFoil is cut to the correct sizeWorkpieces are packed into the foil as closely as possibleAirtight lock by means of folds of a fold lock or suitable tools (see below)Rapid heating of the foil binds the oxygen in the packed piece, preventing virtually all oxidation and decarburizingQuenching takes place with a foil, so the workpiece remains protectedRapid quenching

Accessory Equipment for processing Bags, Envelopes and Foils

Article no. Description491047010 Fold lock with rotating handle4910470�1 Roll tongs for annealing envelopes and bag491041106 Hynit L finger protection gloves for foil use

We recommend using special protective gloves and tools for closing bags, envelopes and foils because the foil has very sharp edges and can be damaged if handled using conventional tools.

Annealing and Heat Treating Foils

Article no. Dimensions Width in mm Length in m

4910�0615 610.0 7.5

Stainless steel heat treating foil

Art.-Nr. 491047010, fold lock

Art.-Nr. 4910470�1, roll tongs

Workpieces in foil heat treating

8

Annealing envelopes useful up to Tmax 1�00 °CFor hardening small partsAirtight lock by means of folds of a fold lock or suitable tools (page 8)Rapid heating of the foil binds the oxygen in the annealing envelope preventing virtually all oxidation and decarburizingRapid quenching in air, oil or water, ensuring high dimensional accuracyWorkpieces are placed as tightly as possible in the annealing envelopeEnvelopes made of ultra-thin stainless steel heat treating foil, welded on three sides, for single use

Annealing Envelopes

Article no. Dimensions in mm Article no. Dimensions in mmWidth Length Width Length

491001000 63 1�7 491004000 �03 �54491001501 63 �03 491004501 �03 35549100�000 101 15� 491005001 �54 30449100�501 101 ��8 491005500 �54 40649100�999 15� �03 491006000 304 355491003500 15� 304 491006500 304 457Other dimensions available upon request

Annealing Bags

Annealing bag suitable for powder nitriding, boriding and high speed steel hardening up to approx. 1050 °C - 1150 °C for cold work purposesMade of stainless steel heat treating foil for single useFor hardening of blocks, stamps, cutting plates, etc.Rapid heating binds the oxygen in the annealing bag so that high-alloy and medium-alloy steel grades can be hardenedRapid quenching in air, oil or water, ensuring high dimensional accuracyWorkpieces are placed as tightly as possible into the annealing bagAirtight lock by means of folds of a fold lock or suitable tools (page 8)

Quadratic cross-section Rectangular cross-sectionArticle no. Dimensions in mm Article no. Dimensions in mm

W D H W D H4910635�0 40 �00 40 4910415�0 100 �00 �5491063530 40 300 40 491041530 100 300 �54910645�0 60 �00 60 491043030 150 300 �5491064530 60 300 60 4910435�0 150 �00 404910655�0 80 �00 80 491043550 150 500 40491065530 80 300 80 491045030 �00 300 404910665�0 100 �00 100 491045�4� �00 4�0 100491066545 100 450 100 491046535 �50 350 40Other dimensions available upon request

Annealing envelopes

Annealing bags

9

Protective Gas Annealing Bag and Holder for Models N 7 - N 61/H

Working with the Protective Gas Annealing Bag and HolderWhen workpieces made of air-hardened steel must be heat treated under protective gas and quenched, the protective gas annealing bag with holder is an optimal solution. This system consists of a holder with charge carrier and protective gas tube as well as a bag made of stainless steel heat treating foil. We would be pleased to carry out trials at our technical center.

The charge is placed on the charge carrier and covered with the protective gas annealing bag. The bag is preflushd with protective gases such as argon, nitrogen or forming gas 95/5 (page 15) and placed together with the holder in the furnace. After the charge has been heated, the protective gas annealing bag and holder are removed from the furnace and cooled with the help of the forced cooling system (page 17) or in still air. At the same time the workpiece remains in the bag in the protective gas atmosphere. This prevents oxidation from occuring. Due to thin-walled foil very rapid cooling times can be achieved.

The protective gas annealing bag is also suitable for quenching workpieces in oil or water. The protective gas annealing bag with holder is taken out of the hot furnace after the heating time. The bag is pulled off the holder above the quenching bath using a heat protection glove (page ��). After this the workpiece can slide directly into the quenching bath. In most steels, the brief exposure to ambient air while being pulled out normally has no effect on surface oxidation of workpieces.

The bags can be used multiple times. Our experience shows that at temperatures < 950 °C the stainless steel heat treating bag lasts for approx. 10-15 processes. At temperatures between 950 °C and 1050 °C, use for approx. 5 - 10 processes can be assumed.

Tmax 1�00 °CHolder with protective gas annealing bag, protective protective gas through notch in upper furnace collarSupplied with three protective gas annealing bagsGas connection with quick-release coupling and 3/8 inch hose connectionHolder with hand handleHeat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)Charge thermocouple type KDigital temperature display (page 16) and protective gas systems (page 15) optionalCharging trolley optional (page 30)

Article no. Furnace Inner dimensions in mm Max. workpiece Replacement hood Preflush/cooling rate Process flush ratew d h length in mm (article no.) l/min l/min

631000539 N 7.. - N 61.. 80 �50 40 180 4910408�5 15 - �0 5 - 8631000540 N 7.. - N 61.. 1�0 �50 60 180 49104��5 15 - �0 5 - 8631000541 N 11.. - N 61.. 1�0 350 60 �80 49104��35 15 - �0 5 - 863100054� N 11.. - N 61.. 160 350 80 �80 491043635 15 - �0 5 - 8631000543 N 17.. - N 61.. 160 4�0 80 350 491043640 15 - �0 5 - 8631000544 N 41.. - N 61.. �00 4�0 100 350 491045�4� �0 - �5 10 - 15

Protective gas annealing bag in operation

Holder with protective gas annealing bag

Thermocouple integrated in holder

10

Protective Gas Boxes for Models N 7 - N 641

Working with Protective Gas Boxes for a Protective Gas AtmosphereThe hardening boxes for heat treatment under protective gas are equipped with a protective gas intlet and outlet.A box with protective gas is advisable for larger workpieces requiring defined heat treating. We would be pleased to carry out trials at our technical center. Up to furnace model N 61/H with downward door opening the gas ductway is laid through the upper section of the door collar, for larger furnaces with upward door opening the supply line is laid through the lower furnace collar.

The box is pressurized with protective gases such as argon, nitrogen or forming gas 95/5 via the protective gas tube. A mixture of 95 % nitrogen and 5 % hydrogen produces optimal results. There are manual and automatic systems available for protective gas. See pages 15-16. for more information about protective gases which can be used as well as manual and automatic protective gas systems.

After charging the box it is closed and preflushed outside the furnace. Afterwards the box is placed in the preheated furnace. The quantity of gas can be reduced to the process flush quantity. After the heat treatment the box is pulled out of the furnace, the charge taken from the box and placed in the quenching medium. In most steels, the brief exposure to ambient air while being pulled out normally has no effect on surface oxidation of workpieces. We recommend using binding wire (page ��) on the parts so that they can easily be grasped by tongs (page ��).

There is a flexible type K thermocouple in the box for measuring the temperature; we recommend connecting it to a digital display device or to a temperature recorder (page 16).

The box can also be cooled down on a cooling platform (page �0) while closed. Be sure that the protective gas flowrate is increased for this application.

Tmax 1100 °CProtective gas box with lid, protective gas inlet and outlet through the furnace collar and seal profile. Gas connection including quick-release coupling with 3/8 inch hose connectionLid sealed with ceramic fiber, ceramic insulating materials can alternatively be usedStarting with model N 81 the gas ductway runs through the lower furnace collarUp to N 17/HR includes manipulating forkHeat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)Charge thermocouple type K

Additional EquipmentStarting from N 31/H a charging trolley is recommended (page 30)Digital temperature display (page 16) Protective gas systems (page 15)

Article no. Furnace Inner dimensions in mm Exterior dimensions in mm Preflush/cooling rate

Process flush rate

w d h W D H l/min l/min63100038� N 7, N 7/H 114 164 77 150 �00 10� 15 - �0 5 - 8 631000383 N 7/H 174 194 97 �10 �30 110 15 - �0 5 - 8 631000384 N 11, N 11/R 174 �44 107 �10 �80 13� 15 - �0 5 - 8 631000385 N 11/H, N 11/HR 194 �94 107 �30 330 13� 15 - �0 5 - 8 631000386 N 17, N 17/R 174 394 107 �10 430 13� 15 - �0 5 - 8 631000387 N 17/H, N 17/HR 194 444 107 �30 480 13� 15 - �0 5 - 8 631000398 N 31, N 31/H �94 �94 147 330 330 17� �0 - �5 10 - 15 631000388 N �1, N 41, N 41/H 194 �94 147 �30 330 17� �0 - �5 10 - 15 631000389 N 41, N 41/H �44 344 177 �80 380 �00 �0 - �5 10 - 15 631000390 N 41, N 41/H �94 394 197 330 430 �� 0 - �5 10 - 15 631000391 N 61, N 61/H �74 494 197 310 530 �� 0 - �5 10 - 1563100039� N 81 394 494 197 430 530 �� 0 - �5 10 - 15 631000393 N 161 456 556 �50 496 596 355 �0 - �5 10 - 15 631000607 N 3�1 47� 850 �1� 581 960 330 �0 - �5 10 - 15 631000608 N 641 7�� 1050 31� 860 1160 456 �0 - �5 10 - 15

Larger boxes and custom dimensions available upon requestArticle no. 601603960, 1 set of fiber insulation cord, 5 strips of 610 mm each

Box with protective gas connection

Winch stacker with hardening box and furnace

N 11 with protective gas box

11

Protective Gas Boxes with additional Vacuum Lid for Models N 7 - N 161

Working with Protective Gas Boxes with additional Vacuum Lid to ensure Protective Gas AtmosphereWhen heat treating bulk goods and hollow parts under defined protective gas atmosphere we recommend the usage of protective gas boxes with an additional vacuum lid. Thus the traces of oxygen in the box can be reduced by a considerable amount which improves the quality of the components accordingly.

These boxes are equipped with a lid for top charging, protective gas inlet and outlet as well as a vacuum lid with rubber sealing gasket. Gas ductwork and handling while hot is the same as the protective gas boxes described on page 11. In addition, these boxes also feature a connection for a vacuum pump with a shut-off valve.

After charging the box in a cold state it is brought into vacuum and afterwards flushed with protective gas. By repeating this process once or several times the results are considerably improved. After the box was flushed with protective gas the last time, the vacuum lid is removed and the box is placed into the preheated furnace. Protective gas is used for heat treatment.

After the heat treatment the box is taken out of the furnace and can be cooled in air or be opened to remove the charge.

The box can also be force-cooled on a cooling platform (page �0) while closed. Be sure that the protective gas flowrate is increased for this application.

Tmax 1100 °CProtective gas box with process lid, vacuum lid, protective gas inlet and outlet through the furnace collar and seal profile for process lid with support for vacuum lidLid sealed with ceramic fiber, ceramic insulating materials can alternatively be usedVacuum lid with rubber sealing gasketGas connection with quick-release coupling and 3/8 inch hose connectionManipulating fork (up to N 17/HR)Heat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)Charge thermocouple type K

Additional EquipmentStarting with model N 31/H, with a charging trolley (page 30)Digital temperature display (page 16)Vacuum pump (page 13)Protective gas system (page 15)

Article no. Furnace Inner dimensions in mm Exterior dimensions in mm* Preflush/cooling rate Process flush ratew d h W D H l/min l/min

631000515 N 7, N 7/H 104 144 4� 150 �00 10� 15 - �0 5 - 8 631000516 N 7/H 164 174 6� �10 �30 110 15 - �0 5 - 8 631000517 N 11, N 11/R 164 ��4 7� �10 �80 13� 15 - �0 5 - 8 631000518 N 11/H, N 11/HR 184 �74 7� �30 330 13� 15 - �0 5 - 8 631000519 N 17, N 17/R 164 374 7� �10 430 13� 15 - �0 5 - 8 6310005�0 N 17/H, N 17/HR 184 4�4 7� �30 480 13� 15 - �0 5 - 8 6310005�1 N 31, N 31/H �84 �74 11� 330 330 17� �0 - �5 10 - 15 6310005�� N �1, N 41, N 41/H 184 �74 11� �30 330 17� �0 - �5 10 - 15 6310005�3 N 41, N 41/H �34 3�4 14� �80 380 �00 �0 - �5 10 - 15 6310005�4 N 41 �84 374 16� 330 430 �� 0 - �5 10 - 156310005�5 N 61, N 61/H �64 474 16� 310 530 �� 0 - �5 10 - 15Larger boxes and custom dimensions available upon request *without vacuum lid

Protective gas box for N 41/H furnace with additional vacuum lid

1�

Protective Gas Boxes with Hinged Lids for Bulk Goods for Models N 7 - N 81


Process flush rate

w d h W D H l/min l/min631000569 N 7 174 179 74 �10 �30 94 15 - �0 5 - 8 631000570 N 7/H 194 179 74 �30 �30 94 15 - �0 5 - 8 631000571 N 11, N 11/R 174 �65 94 �10 316 114 15 - �0 5 - 8 63100057� N 11/H, N 11/HR 194 �65 94 �30 316 114 15 - �0 5 - 8 631000573 N 17, N 17/R 174 405 94 �10 456 114 15 - �0 5 - 8 631000574 N 17/H, N 17/HR 194 405 94 �30 456 114 15 - �0 5 - 8 631000575 N 31/H 149 �65 114 185 316 134 �0 - �5 10 - 15 Larger boxes and custom dimensions available upon request

Vacuum Pump

Vacuum pump

Oil sealed rotary vane vacuum pump for universal use within the low vacuum range. Highly compact and low noise construction. Vacuum pressure gauge included in delivery.

Sliding vane rotary pump Sogevac SV 16BG with sucking capacity of max. 16 m³/h0,5 mbar absoluteConnection hose made of stainless steel 1000 mmConnector KF16Manometer (-1/0,6 bar)

Article no. Exterior dimensions in mm Connections on suction side

Supply Supply Nominal suction power

Suction capacity

W D H power voltage* m3 h m3 h-l601403057 �15 �81 199 3/4" 1/�" inner thread 0.55 KW �30 V 16 15*Article no. for other possible supply voltages on request

Working with Protective Gas Boxes with Hinged Lid for Protective Gas AtmosphereWhen simultaneously heat treating small amounts of bulk material or several small parts using protective gas and afterwards quenching the bulk material or small parts in oil or water, we recommend to use protective gas boxes with a hinged lid. Boxes with an angled hinged lid on the front are equipped with a protective gas line on the rear wall. The supply line is run through the upper furnace collar.

After preflushing the box accordingly with protective gases such as argon, nitrogen or forming gas 95/5 (for details see page 15) the box is placed with hinged lid first into the furnace. Due to a slight overpressure within the box the protective gas is vented off through the hinged lid.

After the heat treatment the box is taken out of the furnace and the charge is poured into quenching bath directly out of the box. By placing the box at an angle the hinged lid opens by itself. While removing the workpieces the surface oxidation is not influenced by the short contact with ambient air.

Tmax 1100 °CProtective gas box with hinged lid and hinges and protective gas inlet through the upper furnace collarLid remains closed through its own weightGas connection with quick-release coupling and 3/8 inch hose connectionWith manipulating forkHeat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)Charge thermocouple type K

Additional EquipmentStarting with model N 31/H, with a charging trolley (page 30) Digital temperature display (page 16)Protective gas systems (page 15)

Protective gas box with hinged lid

13

Working with Protective Gas Boxes with Hinged Lid in continuous OperationWe recommend the usage of protective gas boxes with hinged lids which remain in the furnace while repeatedly heat treating workpieces using protective gas. Boxes with an angled hinged lid on the front are flushed with protective gas via a protective gas line on the rear wall. For the protective gas supply the pipe goes through a bore on the rear wall of the furnace. The gas protection atmosphere which is polluted due to repeatedly opening or charging the boxes does not interfere most heat treatment processes.

For charging, the box is opened in the furnace using a draw hook (page ��) and the workpieces are placed into the box. The box is continuously flushed with protective gas such as argon, nitrogen or forming gas 95/5. The box is closed by the hinged lid's own weight. Due to a slight overpressure within the box the protective gas is vented off through the hinged lid.

After the heat treatment the box is opened using a draw hook and the workpieces are removed.

Tmax 1100 °CGas feed box with hinged lid and hinges and protective gas inlet through the rear wall of box and furnaceLid remains closed through its own weightGas connection with quick-release coupling and 3/8“ hose connectionHeat-resistant alloy 314 (AISI)/(DIN material no. 1.4841)Larger boxes and custom dimensions available upon requestCharge thermocouple type K

Additional EquipmentDigital temperature display (page 16)

Gas feed systems (page 15)

Gas Feed Boxes with Hinged Lid for Models N 7 - N 81 which remain in the Furnace


Process flush rate

w d h W D H l/min l/min631000581 N 7/H 174 179 74 �10 �30 94 15 - �0 5 - 8 63100058� N 7/H 194 179 74 �30 �30 94 15 - �0 5 - 8 631000583 N 11, N 11/R 174 �65 94 �10 316 114 15 - �0 5 - 8 631000584 N 11/H, N 11/HR 194 �65 94 �30 316 114 15 - �0 5 - 8 631000585 N 17, N 17/R 174 405 94 �10 456 114 15 - �0 5 - 8 631000586 N 17/H, N 17/HR 194 405 94 �30 456 114 15 - �0 5 - 8 631000587 N 31/H 149 �65 114 185 316 134 �0 - �5 10 - 15 631000588 N 31/H �09 �65 134 �45 316 154 �0 - �5 10 - 15 631000589 N 41, N 41/H �09 �65 184 �45 316 �04 �0 - �5 10 - 15 631000590 N 41, N 41/H �64 405 184 300 456 �04 �0 - �5 10 - 15 631000591 N 61, N 61/H �64 655 184 300 706 �04 �0 - �5 10 - 1563100059� N 81 389 655 184 4�5 706 �04 �0 - �5 10 - 15Larger boxes and custom dimensions available upon request

Gas connectionDoor

Protective gas box with hinged lid for permanent operation

Probes heat treated in different processes

14

Gas Feed Systems

Protective GasesProtective gases are used to force oxygen out of the gas feed boxes mentioned above. Make sure to use protective gases behaving neutrally toward the heat treated part. The protective gases should be inert, meaning no chemical bonding should occur with the workpiece and no reactions should be enduced.

In many cases, nitrogen is used as protective gas. Our experience shows that nitrogen does not always lead to sufficient results. A longer preflush time must also be used.

Better results are achieved by adding a mixture of nitrogen and adding some hydrogen. Hydrogen acts as a reducing constituent and reacts with the oxygen. This gas mixture is known as forming gas and available in stores. Experience has shown that adding 5 % hydrogen leads to good results. According to the EU material safety data sheet this mixture is considered as not flammable. National regulations, however, must be observed. This gas can be obtained in premixed form. No measures must be taken in advance to prevent explosions.

If the workpiece has an affinity to hydrogen, argon used as protective gas can lead to good results.

Nitrogen and argon are gases which are heavier than air. This makes it relatively easy to fill the protective gas containers. Forming gas with added hydrogen is lighter, but it has the advantage of burning at higher temperatures and therefore binds with the oxygen. Even in a cold state, the leaking hydrogen transports the oxygen very easily out of the container.

Always make sure that the room is properly ventilated when working with protective gases. Country-specific safety regulations must also be followed.

Manual Gas Feed Fitting for BottlesPressure reducing valve with assembled flow meter and attached pressure gauge indicating the bottle pressure The assembled variable area flow meter ensures good readability of the amount usedConnection: screw connection for bottleExit: 3/8 inch hose connection�00 bar intake pressure, 4 bar outlet pressureIncl. 4 m 3/8 inch connecting hose

For N 7 - N 17/HR For N 21 - N 641/13, N 30/45HA + N 500/85HA

Article no. Type of gas Flow rate Article no. Type of gas Flow ratel/min l/min

631000306 Ar 0 - 16 631000309 Ar 0 - 3�631000307 N� 0 - 16 631000310 N� 0 - 3�631000308 Forming gas 95/5 0 - 16 631000311 Forming gas 95/5 0 - 3�*Article no. for Spain, France and Portugal on request

Pressure reducing valve with assembled flow meter

15

Automatic Gas Feed System for two different Flushing Quantities, e.g. high Volume Preflushing and low Volume for ongoing OperationConsisting of:

Switching system with 3-step switch for gas inlet Off/Manual/Automatic via "Extra" function of respective controller, timer for switching from large gas quantity to small gas quantity. Gas feed stops at when program quitsAutomatic gas feed panel with pressure reducer, two adjustable flow meters and two solenoid valves, preinstalled conduit and wiring attached to furnace from the side on an assembly plate.

Connection: 3/8 inch hose connectionExit: 3/8 inch hose connectionMax. 10 bar intake pressure, max. 300 mbar rear pressureIncl. 5 m connection hose 3/8 inchAvailable only in combination with furnace or switchgear

Temperature Measurement in Protective Gas Systems

The use of a thermometer with thermocouple is recommended for determining the exact heat treatment temperature in gas feed boxes or gas feed annealing bags with holder. The thermocouple is permanently mounted on the respective gas feed box or gas feed annealing bag holder. A simple manual temperature probe with LCD display or a temperature indicator with LED display and interface to documentation via the Nabertherm software can be supplied, mounted in a separate metal casing. Both are equipped with a two-pole plug unit for connecting to the thermocouple. The temperature can be determined in this way and, if necessary, readjusted on the controller.

Upon request, the furnace can be operated by charge control with a thermocouple attached to the workpiece.

Gas Feed Systems

Thermostat (manual device)

Article no. Type of gas Flow ratel/min

631000316 Ar 4 - 80631000�00 N� 4 - 80631000315 Forming gas 95/5 4 - 80

Article no. Description40�000057 Temperature indicator with digital display, �30 V 1/N connection, in metal casing54�1000�8 Temperature indicator with digital display, battery-operated, manual deviceV000800 Connecting cable between heat treatment with charge thermocouple and Article no. 40�000057, 3 mV000801 Connecting cable between heat treatment with charge thermocouple and Article no. 54�1000�8, 3 m

Gas Feed Fitting with Solenoid ValveDesigned like the manual gas feed fitting described above, however with an additional solenoid valve mounted on the furnace, controlled using the controller "Extra" function.Connection: screw connection for bottleExit: 3/8 inch hose connection�00 bar intake pressure, 4 bar outlet pressureIncl. 4 m 3/8 inch connecting hoseAvailable only in combination with furnace or switchgear

For N 7 - N 17/HR For N 21 - N 641/13, N 30/45HA + N 500/85HA

Article no. Type of gas Flow rate Article no. Type of gas Flow ratel/min l/min

631000376 Ar 0 - 16 631000379 Ar 0 - 3�631000377 N� 0 - 16 631000380 N� 0 - 3�631000378 Forming gas 95/5 0 - 16 631000381 Forming gas 95/5 0 - 3�*Article no. for Spain, France and Portugal on request

Automatic gas feed system for two flushing quantities

16

Tool Shop Hardening Systems

The MHS 17 hardening system has a modular design and consists of a work platform for the heat treating furnaces, an oil bath for quenching, a water bath for cleaning parts and heating elements for both baths. The baths are mounted to the left and right of the work platform and have charging baskets in order to induce even cooling of the parts in the bath. All parts may be ordered separately meaning the hardening system can be retrofitted or equipment added individually depending on the materials processed.

The MHS 17 can have an air quenching system added to it for air-hardened steels. This platform has a powerful cooling fan to force cool the parts requiring hardening and also the gas feed annealing bag and holder. A refractory brick base is for placing hot boxes and workpieces on them. The quenching baths can also be fastened onto the forced cooling system.

An additional storage platform can be integrated within the system for holding accessory equipment and/or optional charging accessories.

Side platform

MHS 17 with forced cooling system

Article no. Article Exterior dimensions in mm Volume Charging floor grid dimensions Supply SupplyW D H in l Width in mm length in mm power/kW voltage

6310004�8 Work platform 1000 610 760 - - - - -631000430 Oil bath �70 500 500 50 400 �00 - -631000431 Water bath �70 500 500 50 400 �00 - -491005900 Heating element - - - - - - 3,0 230 V6310004�9 Forced cooling system 556 610 760 - 400 �00 0,� 230 V

(cooling platform)63100044� Side platform 556 610 760 - - - - -

Article no. Model Tmax Inner dimensions in mm Volume Exterior dimensions in mm Supply Electrical Weight°C w d h in l W D H power/kW connection* in kg

Controller B 150 Controller C �90 for MHS 17001311110 001311190 N 7/H 1�80 �50 �50 1�0 7 7�0 640 510 3,0 1-phase001311�10 001311�90 N 11/H 1�80 �50 350 140 11 7�0 740 510 3,6 1-phase 70001311310 001311380 N 11/HR 1�80 �50 350 140 11 7�0 740 510 5,5 3-phase¹ 70001311510 001311580 N 17/HR 1�80 �50 500 140 17 7�0 890 510 6,4 3-phase¹ 90Controller B 180 Controller P 330001334160 001334150 N 15/65HA 650 �95 340 170 15 470 845 460 �,7 1-phase 55¹Heating only beetween two phases *Please see page 3� for more information about mains voltage

17

KHS 17

MHS 61

Tool Shop Hardening Systems

The work platform of the system is designed for supporting an N 7/H - N 61/H series hardening furnace and N 15/65 HA - N 60/65HA tempering furnaces. Suitable gas feed boxes can be integrated.

After heating in the hardening furnace, the parts are removed from the furnace or the gas feed box and quenched in an oil quench bath or water bath. The charging basket is used to move the part within the bath so that it cools more evenly. After quenching in oil the the workpiece should be cleaned in the water bath, dried and immediately tempered in a circulating air furnace in order to optimally fix the mechanical components with regard to their strength behavior for the required conditions, minimize distortion and prevent potential flaws.

Article no. Model Tmax Inner dimensions in mm Volume Exterior dimensions in mm Supply Electrical Weight°C w d h in l W D H power/kW connection* in kg

Controller B 150 Controller C �90 for KHS 17001311110 001311190 N 7/H 1�80 �50 �50 1�0 7 7�0 640 510 3,0 1-phase 60001311�10 001311�90 N 11/H 1�80 �50 350 140 11 7�0 740 510 3,6 1-phase 70001311310 001311380 N 11/HR 1�80 �50 350 140 11 7�0 740 510 5,5 3-phase¹ 70001311510 001311580 N 17/HR 1�80 �50 500 140 17 7�0 890 510 6,4 3-phase¹ 90Controller B 180 Controller P 330001334160 001334150 N 15/65HA 650 �95 340 170 15 470 845 460 �,7 1-phase 55

Controller B 150 Controller C �90 for MHS 61

0013�1110 0013�1173 N 31/H 1�80 350 350 �50 30 840 1010 13�0 13,0 3-phase �100013�1�10 0013�1�90 N 41/H 1�80 350 500 �50 40 840 1160 13�0 15,0 3-phase �600013�1310 0013�1395 N 61/H 1�80 350 750 �50 60 840 1410 13�0 �0,0 3-phase 400001334�00 001334�50 N 30/65HA 650 �90 4�0 �60 30 607 + �55 1175 1315 6,0 3-phase¹ 195001334300 001334350 N 60/65HA 650 350 500 350 60 667 + �55 1�50 1400 9,6 3-phase �40Heating only beetween two phases *Please see page 3� for more information about mains voltage

Article no. Article Exterior dimensions in mm Volume Charging floor grid dimensions Supply SupplyW D H in l Width in mm length in mm power/kW voltage

KHS 17

401000104 Work table with quenching and cleaning bath 735 850 1155 - - - - -40100010� Charging basket - - - - - - - -

MHS 61

631000696 Work platform 1050 730 1�50 - - - -631000430 Oil bath �70 500 500 50 400 �00 - -631000431 Water bath �70 500 500 50 400 �00 - -491005900 Heating element - - - - - - 3,0 230 V

18

SHS 41 Protective Gas Hardening System

Protective gas hardening system with furnace N 41/H

This compact, semi-automatic system is suitable for hardening in a protective gas atmosphere followed by quenching of the workpiece in oil. In this way, even larger parts can be annealed under a protective gas and quenched. It consists of a Multitherm N 41/H hardening furnace with a pneumatic door opening and charging plates as well as an oil quench bath on rollers with an integrated pneumatic lowering unit, a floor grid with gas bell, a holding unit for the gas bell as well as a rim exhaust with flame trap.

The workpiece is placed on the floor grid and covered with the gas bell. After preflushing with protective gas, the gas bell is pushed with the floor grid into the hardening furnace. After heat treatment is completed, the workload is pulled out of the furnace onto the lowering unit. The bell is fastened into place by the holding unit and the charging floor grid is lowered pneumatically. In order to obtain best quenching results, the pneumatic lowering unit is moved up and down in the oil quench bath. After completion, the workload is moved into unloading position.

This low cost system can be used for hardening processes which otherwise could only be handled in complex furnace systems. Our professional R&D department will be pleased to carry out suitable testing of your product samples to determine the heat treatment equipment you require.

Multitherm N 41/H chamber furnacePneumatic pedal switch operated door openingCharging plateOil quench bath on rollersPneumatic lowering unitHeating of oil quench bathOil temperature displayCharging floor grid and gas bellHolding unit for gas bellManual protective gas unit (page 15)Draw hook (page ��)Safety equipment consisting of rim exhaust with flame trap

Additional EquipmentSuction hood

Water bath

Article no. Furnace Tmax Inner dimensions in mm Volume Exterior dimensions in mm Supply Electrical WeightModel °C w d h in l W D H power/kW connection* in kg

0013�1�8� N 41/H¹ 1�80 350 500 �50 40 840 1160 13�0 15,0 3-phase �60¹Furnace description, see page 5 *Please see page 3� for more information about mains voltage

Article no. Protective gas bell size in mm Oil quench bath size max. load max. quench Preflush Process Supply Electricalhardening system W D H in liters Weight yield/h rate flush rate power/kW connection*

631006096 SHS 41 �60 380 180 300 �5 kg �0 kg �0 - �5 10 - 15 15.0 3-phase*Please see page 3� for more information about mains voltage

19

Q 200 D

Baths for quenching in oil or water as well as for cleaning and degreasing are available as single or double baths and are made of stainless steel. Oil quench bath assure highly even cooling of workpieces and are equipped with a lid to immediatley extinguish ignited oil. For optimal results, pre-tempering water baths for cleaning workpieces should have an appropriate degreasing additive mixed in to the water bath and be heated to approx. 70 °C by an optionally available heating element. All baths come with a charge carrier, supply and drain line.

The oil and water quench baths are combined within a single casing and separated by a tall sheet metal wall in the Q �00 D, Q 400 D and Q 600 D combination baths so that the oil quench bath is slightly preheated by the water bath. A splash pan is installed in front of the combination bath. Charging aids are available as additional equipment. The Q �00 D combination bath comes with a charge carrier, for models Q 400 D and Q 600 D must be ordered extra. For greater quenchant performance, the baths can be equipped with oil coolers.

Cooling Platforms

Storage platforms for cooling and charging trolleys facilitate rapid forced cooling of mechanical components, hardening or annealing boxes. The platform can also be used for charging the box in front of the furnace.

Fan with �5m³/min cooling air

Quenching and Cleaning Baths

Article no. Furnace Exterior dimensions in mm

Connected load

Supply Comments

W D H kW voltage*6310004�9 Up to N 17/HR 550 610 760 0.� �30 V The same as forced cooling system MHS 17, see page 176310005�9 Up to N 61/H 335 1100 880 - 9�0 0.� �30 V The same as CWK1 charging trolley , see page 30631000�94 Up to N 161 700 800 900 0.9 �30 V*Article no. for other possible supply voltages on request

Article no. Bath Exterior dimensions in mm Volume Quenchant performance max. loadW D H in l in kg/h weight in kg

101300030 Q 50 350 350 700 50 5 - 10101300040 Q �00 550 550 900 �00 �5 - 30 30

Article no. Heating element Supply Supply(optional) power/kW voltage*

491007005 Q 50 3 �30 V491007058 Q �00 6 400 V*Article no. for other possible supply voltages on request

Article no. Bath Exterior dimensions in mm Volume in l max. loadW D H Oil/water weight in kg

101300100 Q �00 D 11�0 700 1000 �00/1�5 �0101300�00 Q 400 D 1500 750 900 400/300 40101300300 Q 600 D 1800 900 900 600/450 60

Heating element Supply Supplypower/kW voltage*

Q �00 D 6 400 VQ 400 D 9 400 VQ 600 D 15 400 V*Other supply voltages possible on request

Charging aid Total height Max. load weight Compressed air Supply Electricalmanual + electric in mm in kg in bar power/kW connection1

Q �00 D 1800 50 6 - 9 - -Q 400 D �480 80 - 0.3 1-phaseQ 600 D �480 100 - 0.3 1-phase

Oil cooler max. quenchant performance Supply Electricalin kg/h power/kW connection¹

Q �00 D approx. 100 0,55 3-phaseQ 400 D approx. �00 �,�0 3-phaseQ 600 D approx. 300 �,�0 3-phase¹Please see page 3� for more information about mains voltage

�0

Suitable for most tooling steelsThermo-chemically stabile and low mistingUnlimited service life under normal useFor mild quenching in critical martensite rangeDurixol W �5 w, can be cleaned using water

Hardening Oil

Quench Water Additive

For even and rapid water hardeningFor water temperatures to 70°C, thus reducing risk of cracks and deformation

For long retention in wash water for cost savingsPrevents oil traces on workpieces and fumes during tempering

Article no. Description Container491000140 Durixol W �5 50 l barrel491000161 Durixol W �5 �00 l barrel491000�40 Durixol W �5 w 50 l barrel

Article no. Description Container491050�00 Hydrodur GF 50 kg sack

Article no. Description Container493000016 Feroclean N-SF 10 kg canister493000014 Feroclean N-SF 30 kg canister493000017 Feroclean N-SF 50 kg barrel493000018 Feroclean N-SF �00 kg barrel

Insulating Materials

Formable ceramic-based mass for sealing hardening boxesAlso suitable for covering workpiece parts not requiring hardening

Article no. Description Container4910001�0 Lenit heat-resistant putty 19 kg491000136 Lenit heat-resistant putty 37 kg

Detergent

Hardening oil

Detergent in canister

�1

491041104 491041103 493000004

Various shapes and sizes for different applications and workpiece geometriesHandle length 600 mm, assuring sufficient distance from hot furnace chamber and for deep immersion length into quench bath

Hardening Tongs

Light design with adjustable hat sizePlastic window, folds up

Heat-Resistant Face Mask

Specially insulated gloves for working with hot mechanical components and working near furnace

Gloves

Binding Wire

For binding workpieces to allow easy removal from boxesAnnealed twice and safe from breakage during charging

Article no. Wire Ø in mm Container491036090 1.00 �5 kg ring4910361�5 1.�5 �5 kg ring491036150 1.50 50 kg ring491036�00 �.00 50 kg ring491036300 3.00 50 kg ring

Article no. Description491003001 Tongs with flat jaw suitable for hand forming49100300� Tongs with vertical mouth for lifting off floor491003003 Tongs with bent mouth, universal use491003004 Tongs with double-curve jaw, universal use491003005 Half round tongs, for round rod materials491003006 Knee tongs for larger rings with thick wall491003008 Handy universal tongs for small parts (handle length 500 mm)

Article no. Description491037105 Heat-resistant face mask

Article no.: 491041101

Article no. Description Short-time contact temperature in °C491041101 Fiberglass glove, 400 mm long approx. 90049104110� Kevlar mitt, �80 mm long approx. 400491041103 Kevlar finger glove, 300 mm long approx. 400491041104 Kevlar mitt, 350 mm long approx. 450493000004 NOMEX finger glove, knit approx. 600

Article no. Length in mm631000663 500631000593 750631000594 1000

Draw Hook

Article no.491003001

49100300�

491003005

491003006

For charging protective gas annealing bags with holder, hardening and protective gas boxesLarge handle, also easy to handle with glove

��

N 1�0/65 HAN 500/65 HA

N 15/65 HA

Chamber Furnaces with Air Circulation

N 30/45 - N 500/85HADue to its high temperature uniformity, these chamber furnaces with air circulation are suitable for processes such as tempering, quenching and tempering, precipitation hardening/curing, solution annealing, artificial aging, preheating or soft annealing and brazing. The furnaces can be equipped with suitable protective gas boxes for soft annealing of copper or tempering titanium as well as tempering of steel in a protective gas atmosphere. The modular design of the furnaces allows accessory equipment to be added based on process requirements.

Tmax. 450 °C, 650 °C or 850 °CFloor, wall and ceiling heatingStainless steel air baffle box in furnace for optimal air circulationRight-mounted swinging doorBase included in delivery, for table-top model N 15/65 HA optional base availableHorizontal air circulationOptimal temperature uniformity in accordance with DIN 1705�-1 up to ΔT 6 K in usable spaceOptimal distribution of air due to high circulation rates

One shelf and rails for two additional shelves included

Article no. Model Tmax Inner dimensions in mm Volume Exterior dimensions in mm Supply Electrical WeightController B 150 Controller C �90 °C w d h in l W D H power/kW connection* in kg001333�00 001333�50 N 30/45HA 450 �90 4�0 �60 30 607 + �55 1175 1315 3.6 1-phase 195001333300 001333350 N 60/45HA 450 350 500 350 60 667 + �55 1�50 1400 6.6 3-phase �40001333400 001333450 N 1�0/45HA 450 450 600 450 1�0 767 + �55 1350 1500 9.6 3-phase 310001333500 001333550 N �50/45HA 450 600 750 600 �50 100� + �55 1636 1860 19.0 3-phase 6110001333600 001333650 N 500/45HA 450 750 1000 750 500 115� + �55 1886 �010 �8.0 3-phase 1030

001334160 (B 180) 001334150 (P 330) N 15/65HA¹ 650 �95 340 170 15 470 845 460 �.7 1-phase 55001334�00 001334�50 N 30/65HA 650 �90 4�0 �60 30 607 + �55 1175 1315 6.0 3-phase² 195001334300 001334350 N 60/65HA 650 350 500 350 60 667 + �55 1�50 1400 9.6 3-phase �40001334400 001334450 N 1�0/65HA 650 450 600 450 1�0 767 + �55 1350 1500 13.6 3-phase 310001334500 001334550 N �50/65HA 650 600 750 600 �50 100� + �55 1636 1860 �1.0 3-phase 610001334600 001334650 N 500/65HA 650 750 1000 750 500 115� + �55 1886 �010 31.0 3-phase 1030

001336100 001336150 N 30/85HA 850 �90 4�0 �60 30 607 + �55 1175 1315 6.0 3-phase² 195001336�00 001336�50 N 60/85HA 850 350 500 350 60 667+�55 1�50 1400 9.6 3-phase �40001336300 001336350 N 1�0/85HA 850 450 600 450 1�0 767+�55 1350 1500 13.6 3-phase 310001336400 001336450 N �50/85HA 850 600 750 600 �50 100�+�55 1636 1860 �1.0 3-phase 610001336500 001336550 N 500/85HA 850 750 1000 750 500 115�+�55 1886 �010 31.0 3-phase 1030

¹Table-top model *Please see page 3� for more information about mains voltage²Heating only beetween two phases

Air circulation furnace with protective gas box

�3

Protective Gas Boxes for Models N 30/45HA - N 500/85HAFor tempering and bright annealing, workpieces are placed in the box, the lid is locked using the sealing locks and flushed with protective gas outside the furnace for some time and then placed in the furnace. Depending on the weight, a charging trolley (page 30) is recommended.

For the non-combustible protective gases argon, nitrogen and forming gas 95/5 with less than 5 % H� (observe national regulations)Protective gas supply with quick lock and hose connector (outer diameter 8 mm)Protective gas box with lid, protective gas supply and return line through the furnace collarProtective gas outlet on the top right sideSealing of lid with ceramic fiberGas connection including quick-release coupling with 3/8 inch hose sleeveMade of heat-resistant alloys: 450 °C - 304 (AISI)/(DIN material no. 1.4301), 650 °C - 3�1 (AISI)/(DIN material no. 1.4541) or 850 °C - 309 (AISI)/(DIN material no. 1.48�8)Lid sealed with ceramic fiber, ceramic insulating materials can alternatively be usedThe annealing boxes are equipped with 70 mm high stacker shoes for WS charging trolley (page 30)Protective gas boxes in a special dimension are required for air circulation furnaces with lift doorPull lug of model N 30/45 HA - N 1�0/85 HACharge thermocouple type K

Additional EquipmentDigital temperature display (page 16), Protective gas systems (page 15), Charging trolley (page 30)

Protective Gas Boxes with Vacuum Lid for Models N 30/45HA - N 500/85HAThe same as the boxes described above, however with vacuum lid and vacuum connection. Before the box is placed in the furnace, in a cold state a vacuum and protective gas atmosphere are alternately generated to force out the oxygen and achieve a pure atmosphere.

Protective gas box with process lid, vacuum lid, protective gas inlet and outlet through the furnace collar and seal profile for process lid with support for vacuum lidProtective gas supply with quick lock and hose connector (outer diameter 8 mm)Lid sealed with ceramic fiber, ceramic insulating materials can alternatively be usedVacuum lid with rubber sealing gasketGas connection with quick-release coupling with 3/8 inch hose sleeveCharge thermocouple type KPull lug of model N 30/45 HA - N 1�0/85 HAMade of heat-resistant alloys: 450 °C - 304 (AISI)/(DIN material no. 1.4301), 650 °C - 3�1 (AISI)/(DIN material no. 1.4541) or 850 °C - 309 (AISI)/(DIN material no. 1.48�8)

Additional EquipmentDigital temperature display (page 16), Protective gas systems (page 15), Vacuum pump (page 13), Charging trolley (page 30)

Article no. Furnace Inner dimensions in mm Exterior dimensions in mmw d h W D H

631000400 N 30/45HA ��0 3�0 160 �8� 376 �4�631000401 N 60/45HA �70 4�0 �60 33� 476 34�63100040� N 1�0/45HA 370 5�0 350 436 560 430631000403 N �50/45HA 480 630 460 546 680 600631000404 N 500/45HA 630 780 610 696 836 760631000405 N 30/65HA ��0 3�0 160 �8� 376 �4�631000406 N 60/65HA �70 4�0 �60 33� 476 34�631000407 N 1�0/65HA 370 5�0 350 436 560 430631000408 N �50/65HA 480 630 460 546 680 600631000409 N 500/65HA 630 780 610 696 836 760631000410 N 30/85HA ��0 3�0 160 �8� 376 �4�631000411 N 60/85HA �70 4�0 �60 33� 476 34�63100041� N 1�0/85HA 370 5�0 350 436 560 430631000413 N �50/85HA 480 630 460 546 680 600631000414 N 500/85HA 630 780 610 696 836 760

Article no. 601603960, 1 set of fiber insulation cord, 5 strips of 610 mm each

Article no. Furnace Inner dimensions in mm Exterior dimensions in mmw d h W D H

631000549 N 30/45HA 170 300 130 �58 388 ��631000550 N 60/45HA �30 380 ��0 318 468 31�631000551 N 1�0/45HA 330 480 3�0 418 568 41�63100055� N �50/45HA 410 560 380 698 648 54�631000553 N 500/45HA 560 810 530 648 898 69�631000554 N 30/65HA 170 300 130 �58 388 ��631000555 N 60/65HA �30 380 ��0 318 468 31�631000556 N 1�0/65HA 330 480 3�0 418 568 41�631000557 N �50/65HA 410 560 380 498 648 54�631000558 N 500/65HA 560 810 530 648 898 69�631000559 N 30/85HA 170 300 130 �58 388 ��631000560 N 60/85HA �30 380 ��0 318 468 31�631000561 N 1�0/85HA 330 480 3�0 418 568 41�63100056� N �50/85HA 410 560 380 498 648 54�631000563 N 500/85HA 560 810 530 648 898 69�

Article no. 601603960, 1 set of fiber insulation cord, 5 strips of 610 mm eachLarger boxes and custom dimensions available upon request

Protective gas box (open)

Protective gas box with lid

Protective gas box with vacuum lid

�4

Pit-Type Furnaces with Air Circulation and Accessory Equip-ment for Tempering and Quenching

S 30/45 A - S 500/85APit-type furnaces with air circulation offer the benefit of easy charging of heavy parts or baskets and are used in the same applications as the chamber furnaces described above: steel tempering after hardening, but also for precipitation hardening/curing, quenching and tempering, solution annealing, artificial aging, preheating and soft annealing, etc. Protective gas boxes with or without a vacuum lid as well as charging baskets and charging aids are available for a wide range of applications.

Tmax. 450 °C, 650 °C or 850 °CStainless steel interiorHot air blower integrated in floor, high air speedVertical air guidanceOptimal temperature uniformity in accordance with DIN 1705�-1 up to ΔT 6 K in usable space

Additional EquipmentCharging aid mounted on side of furnace (page �6)

Cooling platform

Pit-type furnace S �50/65 with protective gas box for bright annealing

Article no. Model Tmax Inner dimensions in mm Volume Exterior dimensions in mm Supply Electrical WeightController B 150 Controller C �90 °C w d h in l W D H power/kW connection* in kg001353100 001353150 S 30/45A 450 300 �50 400 30 5�0 460 9�0 3,6 1-phase 130001353�00 001353�50 S 60/45A 450 350 350 500 60 570 560 10�0 6,6 3-phase ��5001353300 001353350 S 1�0/45A 450 450 450 600 1�0 670 660 11�0 9,6 3-phase �80001353400 001353450 S �50/45A 450 600 600 750 �50 8�0 810 1350 19,0 3-phase 750001353500 001353550 S 500/45A 450 750 750 900 500 970 960 1500 �8,0 3-phase 980

001354100 001354150 S 30/65A 650 300 �50 400 30 530 5�0 10�0 6,0 3-phase¹ 130001354�00 001354�50 S 60/65A 650 350 350 500 60 580 6�0 11�0 9,6 3-phase ��5001354300 001354350 S 1�0/65A 650 450 450 600 1�0 680 7�0 1��0 13,6 3-phase �80001354400 001354450 S �50/65A 650 600 600 750 �50 830 870 1450 �1,0 3-phase 750001354500 001354550 S 500/65A 650 750 750 900 500 980 10�0 1600 31,0 3-phase 980

001355100 001355150 S 30/85A 850 300 �50 400 30 600 740 1000 6,0 3-phase¹ 130001355�00 001355�50 S 60/85A 850 350 350 500 60 710 840 1100 9,6 3-phase ��5001355300 001355350 S 1�0/85A 850 450 450 600 1�0 810 940 1�00 13,6 3-phase �80001355400 001355450 S �50/85A 850 600 600 750 �50 960 1090 1350 �1,0 3-phase 750001355500 001355550 S 500/85A 850 750 750 900 500 1100 1�40 1500 31,0 3-phase 980¹Heating only beetween two phases *Please see page 3� for more information about mains voltage

S �50/65 with swivel arm as charging aid

S 1�0/65 with charging aid and cooling platform as additional equipment

�5

Protective Gas Boxes for Models S 30/45A - S 500/85A

For tempering and bright annealing, workpieces are laid in the box, the lid is pressed firmly shut using the sealing locks and flushed with protective gas outside the box for some time and then placed in the furnace. Due to weight reasons we recommend to use a charging aid for charging.

For the non-combustible protective gases argon, nitrogen and forming gas 95/5 with less than 5 % H� (observe national regulations)Protective gas box with lid, protective gas supply and return line through the furnace collarLid sealed with ceramic fiber, ceramic insulating materials can alternatively be usedGas connection with quick-release coupling with 3/8 inch hose sleeveMade of heat-resistant alloys: 450 °C - 304 (AISI)/(DIN material no. 1.4301), 650 °C - 3�1 (AISI)/(DIN material no. 1.4541) or 850 °C - 309 (AISI)/(DIN material no. 1.48�8)Charging aid lifting eyes

Additional EquipmentDigital temperature display (page 16) Protective gas systems (page 15)

Charge thermocouple type K

A charging aid, fastened to the furnace consisting of a swivel arm and winch is recommended for charging series S 30/45A - S �50/85A pit-type furnaces with protective gas boxes or baskets. This allows easy and safe furnace charging.

Swivel arm, mounted on side of furnaceFor ease of charging and removal of Nabertherm charging baskets and protective gas boxesWinch with hand crank

Max. load 140 kg

Charging Aid for Models S 30/45 A - S 250/85 A

Article no. Furnace Total height in mm631000314 S 30/.. - S 1�0/.. �400631000�71 S �50/.. �600

Article no. Furnace Inner dimensions in mm Exterior dimensions in mm Article no. with charge

w d h W D H thermocouple631006050 S 30/45A �15 165 �77 �81 �31 354 631000500631006051 S 60/45A �65 �65 377 331 331 454 63100050163100605� S 1�0/45A 365 365 477 431 431 554 63100050�631006053 S �50/45A 515 515 6�7 581 581 654 631000503631006054 S 500/45A 665 665 777 731 731 804 631000504631000360 S 30/65A �15 165 �77 �81 �31 354 631000505631000361 S 60/65A �65 �65 377 331 331 454 63100050663100036� S 1�0/65A 365 365 477 431 431 554 631000507631000363 S �50/65A 515 515 577 581 581 654 631000508631000364 S 500/65A 665 665 7�7 731 731 804 631000509631000�59 S 30/85A �15 165 �77 �81 �31 354 631000510631000�60 S 60/85A �65 �65 377 331 331 454 631000511631000�61 S 1�0/85A 365 365 477 431 431 554 63100051�631000�6� S �50/85A 515 515 577 581 581 654 631000513631000�63 S 500/85A 665 665 7�7 731 731 804 631000514Article no. 601603960, 1 sales unit of fiber insulation cord, 5 strips of 610 mm each

Swivel arm mounted on furnace

Protective gas box with sealing lock

�6

The workpieces are placed on different levels for tempering. We recommend the use of a charging aid (page �6) for charging.

Heat-resistant charging basketCharged from side via � drawers (3 levels)Incl. handle / crane lifting eyesHole size 10 mmMade of heat-resistant alloys: 450 °C - 304 (AISI)/(DIN material no. 1.4301), 650 °C - 3�1 (AISI)/(DIN material

no. 1.4541) or 850 °C - 309 (AISI)/(DIN material no. 1.48�8)

The workpieces are placed in basket for tempering. We recommend the use of a charging aid (page �6) for charging.

Heat-resistant charging basket for small parts and bulk materialsFilling from aboveIncl. handle or crane lifting eyesHole size 10 mmMade of heat-resistant alloys: 450 °C - 304 (AISI)/(DIN material no. 1.4301), 650 °C - 3�1 (AISI)/(DIN material

no. 1.4541) or 850 °C - 309 (AISI)/(DIN material no. 1.48�8)

Charging Baskets

Charging basket for top chargingArticle no. Furnace Inner dimensions in mm

w d h631000477 S 30/45A �10 180 350631000478 S 60/45A �60 �80 450631000479 S 1�0/45A 360 380 550631000480 S �50/45A 510 530 650631000481 S 500/45A 570 570 750631000�66 S 30/65A �10 180 350631000�67 S 60/65A �60 �80 450631000�68 S 1�0/65A 360 380 550631000�69 S �50/65A 510 530 650631000�70 S 500/65A 570 570 75063100048� S 30/85A �10 180 350631000483 S 60/85A �60 �80 450631000484 S 1�0/85A 360 380 550631000485 S �50/85A 510 530 650631000486 S 500/85A 570 570 750

Article no. Furnace Inner dimensions in mmw d h

631006035 S 30/45A �30 180 400631006036 S 60/45A �80 �80 450631006037 S 1�0/45A 344 344 500631006038 S �50/45A 490 490 7�0631006039 S 500/45A 660 660 770631006040 S 30/65A �30 180 400631006041 S 60/65A �80 �80 45063100604� S 1�0/65A 344 344 500631006043 S �50/65A 490 490 7�0631006044 S 500/65A 660 660 770631006045 S 30/85A �30 180 400631006046 S 60/85A �80 �80 450631006047 S 1�0/85A 344 344 500631006048 S �50/85A 490 490 7�0631006049 S 500/85A 660 660 770

Special charging basket with 3 drawers (4 levels) for side charging

The workpieces are placed on different levels for tempering. We recommend the use of a charging aid (page �6) for charging.

Heat-resistant charging basket for small parts and bulk materialsCharged in different floorsIncl. handle/crane lifting eyesHole size 1� mmMade of heat-resistant alloys: 450 °C - 304 (AISI)/(DIN material no. 1.4301), 650 °C - 3�1 (AISI)/(DIN material no. 1.4541) or 850 °C - 309 (AISI)/(DIN material no. 1.48�8)

Article no. Furnace No. of Max. charge weight per basket Inner dimensions in mmbaskets w d h

631006106 S �50/85A 7 10 kg 530 530 100

Basket for charging in different floors

�7

Salt-bath hardening in practice

Martempering Furnaces using Neutral Salts

WB 10 - WB 400WB 10 - WB 400 martempering furnaces are filled with neutral salt and offer remarkably rapid and intensive heat transmission to the workpiece while ensuring optimum temperature uniformity. For working temperatures at between 180 °C and 500 °C these furnaces are ideal for quenching or cooling with minimal workpiece distortion, retempering, austempering for optimal toughness, recrystallization annealing after electrical discharge machining (EDM) and for blueing.

The quenching or cooling process is applied in order to achieve an even temperature uniformity throughout the workpiece's entire cross-section before the formation of martensite and to avoid distortion and formation of cracks in valuable mechanical components during the subsequent hardening process.

Tempering in a martempering bath is the same as the tempering process in air circulation furnaces and is used to reduce a previously hardened workpiece to a desired hardness, to increase toughness and reduce stress within the workpiece.

Austempering is a good choice to achieve a high level of toughness and dimensional accuracy in oil hardened low-alloy steels. Workpieces subject to austempering have high tensile strength and good elasticity.

Tmax 500 °COptimal temperature uniformityMartemper bath temperature controlOver-temperature limiter controller with adjustable cutout temperature for thermal protection class � in accordance with EN 60519-� as temperature limiter for furnace and productHeating with immersion heating elementsCharging basket

Additional EquipmentCharging aid mounted on side of furnace

Double martempering bath

Article no. Model Tmax Inner dimensions in mm Volume Outer dimensions in mm Supply Electrical Weight°C w d h in l W D H power/kW connection* in kg

001305100 WB 10 500 ��0 �00 300 10 550 450 570 1.0 1-phase 60001305�00 WB �0 500 300 �10 460 �0 610 580 9�0 �.6 1-phase 110001305300 WB 30 500 300 �10 580 30 610 580 9�0 3.� 1-phase 140001305700 WB 70 500 400 300 680 70 750 680 980 7.5 3-phase �40001305800 WB �00 500 540 5�0 880 �00 900 900 1�00 18.0 3-phase 660001305900 WB 400 500 730 7�0 980 400 1100 1100 1300 �4.0 3-phase 1150

*Please see page 3� for more information about mains voltage

Information about salts by Petrofer and Durferrit and their application

Salt Application Working temperature Commentin °C

AS 135/140 Salt-bath hardening, tempering, austempering

180 - 500 Not for use with workpieces which are heated up to above 950 °C and salts which contain more than 13 % KCN

AS ��0/��5 Tempering, austempering �50 - 500AS �00/�35 Tempering, austempering �80 - 500 Nitrite-free in the as-received conditionAS �00/�35 Tempering 340 - 500

WB 30 with charging aid

�8

TS 20/15 - TSB 70/90Salt-bath furnaces offer remarkably high temperature uniformity and excellent heat transfer to the work piece. Our salt-bath furnaces TS �0/15 - TS or TSB 70/90 are especially useful for heat-treating of metals in neutral or active salt baths. Processes such as carbonitriding (e.g. Tenifer) up to 600 °C, carburizing up to 950 °C, or bright annealing up to 1000 °C can be realized. In their standard version these furnaces are equipped with safety technology for heat treatment of steel. As addional feature they can be equipped with extended safety technology for heat treatment of light metals.

Standard ModelMaximum temperatures of 750 °C or 1000 °C in the salt bathSafety technology according to EN 60519-�Useful for heat treatment of steelBath temperature controlElectric (TS) all-round heating or gas heating (TSB)Removable collar plate made of solid steelInsulated swing-a-way lidOptimum temperature uniformity according to DIN 1705�-1 up to ΔT 4 K in the bathOver-temperature limiter controller in the furnace chamber to prevent dangerous conditions for the furnace or personnelCascade control of salt bath and furnace chamber

CruciblesType P: low carbon steel, CrNi plated and corundum coated for carburizing baths up to 950 °C, neutral salt and annealing baths up to 850 °CType C: high alloy CrNi steel for neutral salt and annealing baths up to 1000 °C

Additional EquipmentExhaust gas collection at rim for connection to an exhaust systemCustom dimensionsEnhanced safety systems for heat treatment of aluminium and magnesium in the salt bath with second over-temperature limiter controller and PLC-bath control with thermocouples in the salt bath and in the furnace

chamber

Salt-Bath Furnaces, electrically (TS) or gas heated (TSB) for Heat Treatment of Steel or Light Metals

Salt bath plant for annealing of aluminum components in the aircraft industry

TS 40/30with exhaust gas collection at crucible rim

TSB 30/30with exhaust gas collection at crucible rim

Model Tmax Inner dimensions crucible Volume Outer dimensions in mm Supply Electrical Weight°C² Ø in mm h in mm in l W D H power/kW¹ connections* in kg¹

TS �0/15 750 �30 500 �0 850 970 800 16 3-phase 650TS 30/18 750 300 500 30 950 1070 800 �0 3-phase 700TS 40/30 750 400 500 60 1050 1170 800 33 3-phase 750TS 50/48 750 500 600 110 1150 1�70 970 58 3-phase 1000TS 60/63 750 610 800 ��0 1�50 1370 1170 70 3-phase 1�00TS 70/7� 750 700 1000 370 1350 1470 1370 80 3-phase 1500

TS, TSB �0/�0 1000 �30 500 �0 850 970 800 �1 3-phase 650TS, TSB 30/30 1000 300 500 30 950 1070 800 33 3-phase 700TS, TSB 40/40 1000 400 500 60 1050 1170 800 44 3-phase 750TS, TSB 50/60 1000 500 600 110 1150 1�70 970 66 3-phase 1000TS, TSB 60/7� 1000 610 800 ��0 1�50 1370 1170 80 3-phase 1�00TS, TSB 70/90 1000 700 1000 370 1350 1470 1370 100 3-phase 1500

¹Only for electric version *Please see page 3� for more information about supply voltage²Salt bath temperature

�9

Charging Devices with and without Cooling Fan for Models N 31/H - N 641/13, N 30/45 HA - N 500/85 HA

CW 1 and CWK 1 Charging Trolley

For charging larger workpieces and hardening boxes.4 casters, freely movableEquipped with a rack at working height for temporary storageCWK version with cooling fan (0.� kW, �30 V)

Charging Trolleys CW 2 - CW 4 and CWK 2 - CWK 4

� casters, � fixed rollers for heavy loadsEquipped with a grid at working height for temporary storageFurnace locking via pedal leverCWK version with cooling fan

WS Charging Stacker

Charging by means of a hand winch stackerCompact construction with push bar and manual lifting device for easy and safe liftingWS 81 with parallel guided lift� casters, � fixed rollers for heavy loadsAdjustable loading forksGuide on furnace for precise positioningMax. charging weight 500 kg

WS charging stacker

Article no. Furnace Designation Exterior dimensions in mmW D H

6310005�8 N 31/H, N 41.., N 61.. CW 1 330 1100 880 - 9�0N 30/..HA, N 60/..HA

6310005�9 N 31/H, N 41.., N 61.. CWK 1 330 1100 880 - 9�0N 30/..HA, N 60/..HA

Article no. Furnace Designation Useful dimensions in mm Connected load ElectricalW D kW connection*

631000530 N 81, N 161, N 1�0/..HA CW � 550 750 - -631000531 N 3�1 CW 3 750 1100 - -631000468 N 641 CW 4 1000 1300 - -631000469 N 81, N 161, N 1�0/..HA CWK � 0.9 1-phase631000470 N 3�1 CWK 3 750 1100 0.9 1-phase631000471 N 641 CWK 4 1000 1300 0.9 1-phase

*Please see page 3� for more information about mains voltage

Article no. Furnace Max. charge weight Designation631000473 N 81 100 WS 816310004�5 N 161 500 WS 161631000370 N 3�1 500 WS 3�16310004�6 N 641 700 WS 641631000�99 N �50/..HA 500 WS �563100053� N 500/..HA 500 WS 50

Charging trolley CW �

CWK1 charging trolley

30

Hardness Testers

Model RAS(N) as Standard Model

For Rockwell hardness test A - B - C of hardened and tempered steel, strip steel, soft and carbonized steel, non-ferrous metals, construction steel and cast ironMeasuring height �30 mm, plug-in depth 133 mmDimensions: 180 x 450 x 645 mm (WxDxH)Incl. platform (dimensions: 400 x 600 x 900 mm (WxDxH))Total weight approx. 100 kgEasy handling with automatic zero adjustment and automatic load changeWater level for aligningDelivery includes base plates Ø 50 mm and Ø 40 mm as well as prism for round parts, diamond penetrator 1�0° and steel ball 1/16 inch and HRB and HRC control plates for calibrating at regular intervals

Model PR1 (portable)

For Rockwell hardness test A - B - CFor evaluating and controlling welding seams, local stock material or axles, machine parts, shafts without prior disassemblyFor mobile use on offshore platforms, ships, etc.Measuring height 1�0 mmWeight 1700 gDelivered in wooden case

Article no. Description491000600 RAS(N) tester incl. platform and accessories491000650 Spare diamond491000660 Spare 1/16“steel ball491000670 Spare control plate for Rockwell B or C

Article no. Description491000�50 PR 1 tester incl. accessories and wooden case491000160 Spare diamond

Hardness tester RAS(N)

Hardness tester PR1 in wooden case

31

Our customers have heat treated highly different materials in our technical heat treatment center. The following section summarizes the experience we have gained.

AluminumIn most cases aluminum is not heat treated using protective gas. A protective atmosphere is often required for brazing aluminum construction parts. Experiments in circulation air furnaces protective gas boxes lead to good results.

Cold- and hot-working SteelsThese steels can be used directly in the furnace but also in a protective gas box or a protective gas annealing bag with holder in order to avoid decarbonizing and scaling. Best results are achieved using forming gas. The annealing bag is useful if the tools are not too big. The advantage of using the bag is the minimal mass. By using a fan the charge can be cooled down very quickly. This requires to increase the gas flow in order to draw the heat away from the tool. When used properly the tools remain bright.

Large parts can be treated in a protective gas boxes. The protective gas box is taken out of the furnace after an appropriate through-heating time. Afterwards, the box must be opened and the part quenched accordingly. Numerous steels can be quenched in still air.

Protective gas annealing bags or protective gas box can, of course, also be used if the tools are cooled down in an oil quench bath or in a martempering bath. The containers then are opened and the charge is immersed in the appropriate quenching medium using tongs or a crane.

CopperCopper characteristically becomes compressed and therefore hardens after mechanical processing. To soften it for rework the copper must annealed again. This can be done in a normal furnace. Because copper reacts to atmospheric oxygen and oxides form on its surface, after annealing copper parts are quenched in a water bath, causing the oxides to chip off.If the oxide formation is avoided then no quenching is required. The oxides can be prevented from forming by using protective gas. Use of a protective gas box is advisable in this case. In certain cases, the customer must determine if the use of forming gas is allowed, because hydrogen generally may impair the material properties of copper.

TitaniumThis material is highly sensitive and very prone to the formation of oxides. Titanium is often used in safety-related parts. Requirements are especially demanding in aviation, space and medical technology. No forming gas may normally be used with this material because the hydrogen causes damage to the material. Here argon is used together with a protective gas box and vacuum lid. Otherwise, normal operation with various systems is possible, as described.

Experience in using different Materials

Supply Voltages for Nabertherm Furnaces1-phase: all furnaces are available for supply voltages of 110 V - �40 V, 50 or 60 Hz.3-phase: all furnaces are available for supply voltages of �00 V - �40 V or 380 V - 480 V, 50 or 60 Hz.

3�

www.nabertherm.com

MadeinGermany

Technical CeramicsMIM/CIM, Solar, Silicon

Debinding FurnacesSintering FurnacesKilnsLaboratory Furnaces BioceramicsPhotovoltaicsCrystal GrowthCatalytic or Thermal AfterburnersPlant Concepts

www.nabertherm.com

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Ar ts & Craf ts

Furnaces and Accessories

PotteryPorcelain PaintingGlass PaintingFusingDecoratingEnamellingRaku

FusingDecoratingCoolingTemperingMeltingDebinderingSinteringLaboratory

G l a s s

www.nabertherm.com

MadeinGermany

Laboratory

Muffl e FurnacesPreheating FurnacesAshing FurnacesTube FurnacesOvensAir Circulation FurnacesChamber FurnacesMelting FurnacesHigh-Temperature FurnacesSintering Furnaces of ZirconiaVacuum FurnacesDental Furnaces

www.nabertherm.com

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The Nabertherm Product Range – www.nabertherm.com

FoundryEvery furnace for the shop that casts metal, beginning with ovens to dry cores and dewax investments, to fuel-fired and electric resistance melting furnaces, to thermal decoring and heat treatment systems. All Nabertherm Foundry furnaces are designed for energy efficiency and integration with automation systems for low total cost of ownership.

Laboratory/DentalLaboratory furnaces are available for a variety of applications ranging between 30 - 3000 °C. Our standard product range includes muffle, tube, convection, melting, assay, and high temperature furnaces.

Technical Ceramics MIM/CIM, Solar, Silicon/BioCeramicsWire-heated kilns for use up to 1400 C and MoSi² kilns for use up to 1800 C offer the best value and quality for sintering Technical Ceramics. All are available in sizes from bench-top to walk-in. To remove binders, we offer solutions from our Combi-Furnaces that debind and sinter in the same furnace to specialized systems for binder removal in a specialized atmosphere (e.g. BASF Catamold).

GlassDifferent furnace concepts for annealing, bending slumping, decorating and tempering make Nabertherm your strong partner for the heat treatment of glass and quartz.

Arts & CraftsArt is the union of style and technical skill. Good tools are functional and efficient. Are Nabertherm's kilns for pottery, fused glass, painted porcelain, and enamel ware tools or art?

33

Steel Selection These specifications are recommendations and approximate values only. Nabertherm provides no guarantee and accepts no liability for this. Specific information must be determined by the customer. Steel manufacturers provide specific heat treatment regulations for each steel type.

Case hardening steels

Description Analysis in % Heat treatmentMaterial DIN SAE/AISI C Si Mn P S Cr Mo Ni Other Warm forming tempe-

rature [°C]Soft annealing [°C] Carburizing [°C] Core hardening

[°C]Intermediate

annealing [°C]Surface

hardening [°C]Quenching medium¹)

Tempering [°C]

1.0401 C 15 1015 0,1� - 0,18 < 0,40 0,30 - 0,60 < 0,045 < 0,045 - - - - 1150 - 850 650 - 700 880 - 980 880 - 9�0 - 780 - 8�0 - 150 - �001.5919 15 CrNi 6 3115 0,14 - 0,19 < 0,40 0,40 - 0,60 < 0,035 < 0,035 1,40 - 1,70 - 1,70 - 1,70 - 1150 - 850 650 - 700 880 - 980 830 - 870 630 - 650 780 - 8�0 O/WB 150 - �001.6587 17 CrNiMo 6 - 0,15 - 0,�1 < 0,40 0,50 - 0,90 < 0,0�5 < 0,015 1,50 - 1,80 0,�5 - 0,35 1,40 - 1,70 Al < 0,05; Cu < 0,3 1150 - 850 650 - 700 880 - 980 830 - 870 630 - 650 780 - 8�0 O/WB 150 - �001.7131 16 MnCr 5 5115 0,14 - 0,19 < 0,40 1,00 - 1,30 < 0,035 < 0,035 0,80 - 1,10 - - - 1150 - 850 650 - 700 880 - 980 860 - 900 - 780 - 8�0 O/WB 150 - �00

Hot-working steels

Description Analysis in % Heat treatmentMaterial DIN SAE/AISI C Si Mn P S Cr Mo Ni V Warm forming

temperature [°C]Soft annealing

[°C]Brinell hardness

HB30 soft annealedHardening [°C] Quenching

medium¹)Tempering [°C] Tensile strength ~ [N/mm�] after

Hardening Tempering at 400 °C

Tempering at 500 °C



Usable hardness N/mm�

1.�343 X 38 CrMoV 5 1 H11 0,36 - 0,4� 0,90 - 1,�0 0,30 - 0,50 < 0,030 < 0,030 4,80 - 5,50 1,10 - 1,40 - 0,�5 - 0,50 1100 - 900 760 - 780 < �35 10�0 - 1050 O/A/WB 550 - 650 1960 - �060 16�0 980 1180 - 17701.�365 X 3� CrMoV 3 3 H10 0,�8 - 0,35 0,10 - 0,40 0,15 - 0,45 < 0,030 < 0,030 �,70 - 3,�0 �,60 - 3,00 - 0,40 - 0,70 1050 - 900 760 - 780 < �30 10�0 - 1050 O/A/WB 500 - 670 17�0 - 1670 1570 1030 1180 - 16701.�714 56 NiCrMoV 7 L6 0,50 - 0,60 0,10 - 0,40 0,65 - 0,95 < 0,030 < 0,030 1,00 - 1,�0 0,45 - 0,55 1,50 - 1,80 0,07 - 0,1� 1050 - 850 680 - 710 < �50 840 - 870 O 400 - 650 �060 1770 1570 13�0 - 1180 - 1770

Quenching steels


rature [°C]Soft annealing [°C] Brinell hardness HB30

soft annealedNormalizing [°C] Tempering [°C] Quenching medium¹) Tempering [°C]

1.0503 C 45 1045 0,4� - 0,50 < 0,40 0,50 - 0,80 < 0,045 < 0,045 < 0,40 < 0,10 < 0,40 Cr+Mo+Ni < 0,63 1100 - 850 650 - 700 < �07 840 - 880 8�0 - 860 W/O 550 - 6601.6511 36 CrNiMo 4 - 0,3� - 0,40 < 0,40 0,50 - 0,80 < 0,035 < 0,035 0,90 - 1,�0 0,15 - 0,30 0,90 - 1,�0 - 1050 - 850 650 - 700 < �48 850 - 880 8�0 - 850 W/O 540 - 6801.6580 30 CrNiMo 8 - 0,�6 - 0,34 < 0,40 0,30 - 0,60 < 0,035 < 0,035 1,80 - �,�0 0,30 - 0,50 1,80 - �,�0 - 1050 - 850 650 - 700 < �48 850 - 880 830 - 860 O 540 - 6801.7033 34 Cr 4 513� 0,30 - 0,37 < 0,40 0,60 - 0,90 < 0,035 < 0,035 0,90 - 1,�0 - - - 1050 - 850 680 - 7�0 < ��3 850 - 890 830 - 870 W/O 540 - 6801.7��0 34 CrMo 4 4137 0,30 - 0,37 < 0,40 0,60 - 0,90 < 0,035 < 0,035 0,90 - 1,�0 0,15 - 0,30 - - 1050 - 850 680 - 7�0 < ��3 850 - 890 830 - 870 W/O 540 - 6801.7��8 50 CrMo 4 4150 0,46 - 0,54 < 0,40 0,50 - 0,80 < 0,035 < 0,035 0,90 - 1,�0 0,15 - 0,30 - - 1050 - 850 680 - 7�0 < �48 840 - 880 8�0 - 860 O 540 - 6801.8159 50 Crv 4 6150 0,47 - 0,55 < 0,40 0,70 - 1,10 < 0,035 < 0,035 0,90 - 1,�0 - - V 0,10 - 0,�5 1050 - 850 680 - 7�0 < �48 840 - 880 8�0 - 860 O 540 - 680

Nitriding steels

Description Analysis in % Heat treatmentMaterial DIN SAE/AISI C Si Mn P S Cr Mo Al Other Warm forming tempe-

rature [°C]Soft annealing



medium¹)Tempering [°C] Stress relieving

after mech. processing

[°C]

Nitriding [°C] Nitriding hardness HV1

1.8507 34 CrAlMo 5 - 0,30 - 0,37 < 0,40 0,50 - 0,80 < 0,0�5 < 0,030 1,00 - 1,30 0,15 - 0,�5 0,80 - 1,�0 - 1050 - 850 650 - 700 < �48 900 - 940 W/O 570 - 650 550 - 570 500 - 5�0 9501.8519 31 CrMoV 9 - 0,�6 - 0,34 < 0,40 0,40 - 0,70 < 0,0�5 < 0,030 �,30 - �,70 0,15 - 0,�5 - V 0,10 - 0,�0 1050 - 850 680 - 7�0 < �48 840 - 880 W/O 570 - 680 550 - 580 500 - 5�0 8001.8550 34 CrAlNi 7 - 0,30 - 0,37 < 0,40 0,40 - 0,70 < 0,0�5 < 0,030 1,50 - 1,80 0,15 - 0,�5 0,80 - 1,�0 Ni 0,85 - 1,15 1050 - 850 650 - 700 < �48 850 - 890 O 570 - 660 550 - 580 500 - 5�0 950

Tool steelsCold-working steels, non alloy



[°C]Brinell hardness HB30 soft

annealedHardening [°C] Quenching

medium¹)Hardness [HRC] Hardness depth

[mm]Tempering [°C] Surface hardness in HRC after tempering at


Tempering at �00 °C


1.1545 C 105 W1 W1 1,00 - 1,10 0,10 - 0,�5 0,10 - 0,�5 < 0,0�0 < 0,0�0 - - - - 1000 - 800 680 - 710 < 190 770 - 800 W 65 �,0 - 3,0 180 - 300 64 6� 561.1740 C 60 W - 0,55 - 0,65 0,15 - 0,40 0,60 - 0,80 < 0,035 < 0,035 - - - - 1100 - 800 680 - 710 < �07 800 - 830 O 58 3,5 - 5,0 180 - 300 58 54 48

Tool steelsCold-working steels, alloyed

Description Analysis in % Heat treatmentMaterial DIN SAE/AISI C Si Mn P S Cr Mo V Other Warm forming


[°C]Brinell hardness HB30

soft annealedHardening [°C] Quenching

medium¹)Tempering [°C] Surface hardness in HRC after tempering at






1.�16� �1 Mn Cr 5 - 0,18 - 0,�4 0,15 - 0,�4 1,10 - 1,40 < 0,030 < 0,030 1,00 - 1,30 - - - 1050 - 850 680 - 710 < �15 810 - 840 O/WB 150 - 180 6�²) 61²) 60²) 57²) 54²) 50²)1.��10 115 CrV 3 51�0 1,10 - 1,�5 0,15 - 0,30 0,�0 - 0,40 < 0,030 < 0,030 0,50 - 0,80 - 0,07 - 0,1� - 1050 - 850 710 - 740 < ��0 760 - 840 W/O 180 - �50 64 64 61 58 51 441.�316 X 36CrMo 17 - 0,33 - 0,43 < 1,00 < 1,00 < 0,030 < 0,030 15,0 - 17,0 1,00 - 1,30 - Ni < 1,00 1100 - 750 780 - 8�0 < �50 1000 - 1040 O/WB 650 - 700 49 49 47 46 46 441.�436 X �10 CrW 1� D6 �,00 - �,�5 0,10 - 0,40 0,15 - 0,45 < 0,030 < 0,030 11,0 - 1�,0 - - W 0,60 - 0,80 1000 - 850 800 - 840 < �55 950 - 980 O/A/WB 180 - �50 64 63 6� 60 58 561.�550 60 WCrV 7 S1 0,55 - 0,65 0,50 - 0,70 0,15 - 0,45 < 0,030 < 0,030 0,90 - 1,�0 - 0,10 - 0,�0 W 1,80 - �,10 1050 - 850 710 - 750 < ��5 870 - 900 O/WB 180 - 300 60 60 58 56 5� 481.�767 X 45 NiCrMo 4 - 0,40 - 0,50 0,10 - 0,40 0,15 - 0,45 < 0,030 < 0,030 1,�0 - 1,50 0,15 - 0,35 - Ni 3,80 - 4,30- 1050 - 850 610 - 650 < �60 840 - 870 O/A/WB 160 - �50 56 56 54 50 46 4�

High speed steels

Description Analysis in % Heat treatmentMaterial DIN SAE/AISI C Si Mn P S Co Cr Mo V W Warm forming

temperature [°C]Soft annealing [°C] Brinell hardness

HB30 soft annealedHardening process

Preheating [°C] Preheating 1. Level [°C]

Preheating �. Level [°C]

Hardening [°C] Quenching medium¹)

Tempering [°C] Temperinghardness [HRC]

1.3�0� S 1� - 1 - 4 - 5 T15 1,30 - 1,45 < 0,45 < 0,40 < 0,030 < 0,030 4,50 - 5,00 3,80 - 4,50 0,70 - 1,00 3,50 - 4,00 11,5 - 1�,5 1100 - 900 780 - 810 �40 - 300 450 - 600 850 1050 1�10 - 1�50 O/WB/A 550 - 570 < 651.3�43 S 6 - 5 - � - 5 M41 0,88 - 0,96 < 0,45 < 0,40 < 0,030 < 0,030 4,50 - 5,00 3,80 - 4,50 4,70 - 5,�0 1,70 - �,00 6,00 - 6,70 1100 - 900 790 - 8�0 �40 - 300 450 - 600 850 1050 1�00 - 1�40 O/WB/A 550 - 570 < 641.3�55 S 18 - 1 - � - 5 T4 0,75 - 0,83 < 0,45 < 0,40 < 0,030 < 0,030 4,50 - 5,00 3,80 - 4,50 0,50 - 0,80 1,40 - 1,70 17,5 - 18,5 1150 - 900 8�0 - 850 �40 - 300 450 - 600 850 1050 1�60 - 1300 O/WB/A 550 - 570 < 641.3343 S 6 - 5 - � M� 0,86 - 0,94 < 0,45 < 0,40 < 0,030 < 0,030 - 3,80 - 4,50 4,70 - 5,�0 1,70 - �,00 6,00 - 6,70 1100 - 900 790 - 8�0 �40 - 300 450 - 600 850 1050 1190 - 1�30 O/WB/A 550 - 570 < 64

¹) W = Water, WB = Warmbath, O = Oil, A = Air, Temperatures acc. to steel manufacturer²) Surface hardness after case hardening

34

Case hardening steels


rature [°C]Soft annealing [°C] Carburizing [°C] Core hardening

[°C]Intermediate

annealing [°C]Surface

hardening [°C]Quenching medium¹)

Tempering [°C]

1.0401 C 15 1015 0,1� - 0,18 < 0,40 0,30 - 0,60 < 0,045 < 0,045 - - - - 1150 - 850 650 - 700 880 - 980 880 - 9�0 - 780 - 8�0 - 150 - �001.5919 15 CrNi 6 3115 0,14 - 0,19 < 0,40 0,40 - 0,60 < 0,035 < 0,035 1,40 - 1,70 - 1,70 - 1,70 - 1150 - 850 650 - 700 880 - 980 830 - 870 630 - 650 780 - 8�0 O/WB 150 - �001.6587 17 CrNiMo 6 - 0,15 - 0,�1 < 0,40 0,50 - 0,90 < 0,0�5 < 0,015 1,50 - 1,80 0,�5 - 0,35 1,40 - 1,70 Al < 0,05; Cu < 0,3 1150 - 850 650 - 700 880 - 980 830 - 870 630 - 650 780 - 8�0 O/WB 150 - �001.7131 16 MnCr 5 5115 0,14 - 0,19 < 0,40 1,00 - 1,30 < 0,035 < 0,035 0,80 - 1,10 - - - 1150 - 850 650 - 700 880 - 980 860 - 900 - 780 - 8�0 O/WB 150 - �00

Hot-working steels

Description Analysis in % Heat treatmentMaterial DIN SAE/AISI C Si Mn P S Cr Mo Ni V Warm forming




medium¹)Tempering [°C] Tensile strength ~ [N/mm�] after





Usable hardness N/mm�

1.�343 X 38 CrMoV 5 1 H11 0,36 - 0,4� 0,90 - 1,�0 0,30 - 0,50 < 0,030 < 0,030 4,80 - 5,50 1,10 - 1,40 - 0,�5 - 0,50 1100 - 900 760 - 780 < �35 10�0 - 1050 O/A/WB 550 - 650 1960 - �060 16�0 980 1180 - 17701.�365 X 3� CrMoV 3 3 H10 0,�8 - 0,35 0,10 - 0,40 0,15 - 0,45 < 0,030 < 0,030 �,70 - 3,�0 �,60 - 3,00 - 0,40 - 0,70 1050 - 900 760 - 780 < �30 10�0 - 1050 O/A/WB 500 - 670 17�0 - 1670 1570 1030 1180 - 16701.�714 56 NiCrMoV 7 L6 0,50 - 0,60 0,10 - 0,40 0,65 - 0,95 < 0,030 < 0,030 1,00 - 1,�0 0,45 - 0,55 1,50 - 1,80 0,07 - 0,1� 1050 - 850 680 - 710 < �50 840 - 870 O 400 - 650 �060 1770 1570 13�0 - 1180 - 1770

Quenching steels


rature [°C]Soft annealing [°C] Brinell hardness HB30

soft annealedNormalizing [°C] Tempering [°C] Quenching medium¹) Tempering [°C]

1.0503 C 45 1045 0,4� - 0,50 < 0,40 0,50 - 0,80 < 0,045 < 0,045 < 0,40 < 0,10 < 0,40 Cr+Mo+Ni < 0,63 1100 - 850 650 - 700 < �07 840 - 880 8�0 - 860 W/O 550 - 6601.6511 36 CrNiMo 4 - 0,3� - 0,40 < 0,40 0,50 - 0,80 < 0,035 < 0,035 0,90 - 1,�0 0,15 - 0,30 0,90 - 1,�0 - 1050 - 850 650 - 700 < �48 850 - 880 8�0 - 850 W/O 540 - 6801.6580 30 CrNiMo 8 - 0,�6 - 0,34 < 0,40 0,30 - 0,60 < 0,035 < 0,035 1,80 - �,�0 0,30 - 0,50 1,80 - �,�0 - 1050 - 850 650 - 700 < �48 850 - 880 830 - 860 O 540 - 6801.7033 34 Cr 4 513� 0,30 - 0,37 < 0,40 0,60 - 0,90 < 0,035 < 0,035 0,90 - 1,�0 - - - 1050 - 850 680 - 7�0 < ��3 850 - 890 830 - 870 W/O 540 - 6801.7��0 34 CrMo 4 4137 0,30 - 0,37 < 0,40 0,60 - 0,90 < 0,035 < 0,035 0,90 - 1,�0 0,15 - 0,30 - - 1050 - 850 680 - 7�0 < ��3 850 - 890 830 - 870 W/O 540 - 6801.7��8 50 CrMo 4 4150 0,46 - 0,54 < 0,40 0,50 - 0,80 < 0,035 < 0,035 0,90 - 1,�0 0,15 - 0,30 - - 1050 - 850 680 - 7�0 < �48 840 - 880 8�0 - 860 O 540 - 6801.8159 50 Crv 4 6150 0,47 - 0,55 < 0,40 0,70 - 1,10 < 0,035 < 0,035 0,90 - 1,�0 - - V 0,10 - 0,�5 1050 - 850 680 - 7�0 < �48 840 - 880 8�0 - 860 O 540 - 680

Nitriding steels

Description Analysis in % Heat treatmentMaterial DIN SAE/AISI C Si Mn P S Cr Mo Al Other Warm forming tempe-




medium¹)Tempering [°C] Stress relieving

after mech. processing

[°C]

Nitriding [°C] Nitriding hardness HV1

1.8507 34 CrAlMo 5 - 0,30 - 0,37 < 0,40 0,50 - 0,80 < 0,0�5 < 0,030 1,00 - 1,30 0,15 - 0,�5 0,80 - 1,�0 - 1050 - 850 650 - 700 < �48 900 - 940 W/O 570 - 650 550 - 570 500 - 5�0 9501.8519 31 CrMoV 9 - 0,�6 - 0,34 < 0,40 0,40 - 0,70 < 0,0�5 < 0,030 �,30 - �,70 0,15 - 0,�5 - V 0,10 - 0,�0 1050 - 850 680 - 7�0 < �48 840 - 880 W/O 570 - 680 550 - 580 500 - 5�0 8001.8550 34 CrAlNi 7 - 0,30 - 0,37 < 0,40 0,40 - 0,70 < 0,0�5 < 0,030 1,50 - 1,80 0,15 - 0,�5 0,80 - 1,�0 Ni 0,85 - 1,15 1050 - 850 650 - 700 < �48 850 - 890 O 570 - 660 550 - 580 500 - 5�0 950

Tool steelsCold-working steels, non alloy



[°C]Brinell hardness HB30 soft

annealedHardening [°C] Quenching

medium¹)Hardness [HRC] Hardness depth

[mm]Tempering [°C] Surface hardness in HRC after tempering at




1.1545 C 105 W1 W1 1,00 - 1,10 0,10 - 0,�5 0,10 - 0,�5 < 0,0�0 < 0,0�0 - - - - 1000 - 800 680 - 710 < 190 770 - 800 W 65 �,0 - 3,0 180 - 300 64 6� 561.1740 C 60 W - 0,55 - 0,65 0,15 - 0,40 0,60 - 0,80 < 0,035 < 0,035 - - - - 1100 - 800 680 - 710 < �07 800 - 830 O 58 3,5 - 5,0 180 - 300 58 54 48

Tool steelsCold-working steels, alloyed

Description Analysis in % Heat treatmentMaterial DIN SAE/AISI C Si Mn P S Cr Mo V Other Warm forming


[°C]Brinell hardness HB30

soft annealedHardening [°C] Quenching

medium¹)Tempering [°C] Surface hardness in HRC after tempering at






1.�16� �1 Mn Cr 5 - 0,18 - 0,�4 0,15 - 0,�4 1,10 - 1,40 < 0,030 < 0,030 1,00 - 1,30 - - - 1050 - 850 680 - 710 < �15 810 - 840 O/WB 150 - 180 6�²) 61²) 60²) 57²) 54²) 50²)1.��10 115 CrV 3 51�0 1,10 - 1,�5 0,15 - 0,30 0,�0 - 0,40 < 0,030 < 0,030 0,50 - 0,80 - 0,07 - 0,1� - 1050 - 850 710 - 740 < ��0 760 - 840 W/O 180 - �50 64 64 61 58 51 441.�316 X 36CrMo 17 - 0,33 - 0,43 < 1,00 < 1,00 < 0,030 < 0,030 15,0 - 17,0 1,00 - 1,30 - Ni < 1,00 1100 - 750 780 - 8�0 < �50 1000 - 1040 O/WB 650 - 700 49 49 47 46 46 441.�436 X �10 CrW 1� D6 �,00 - �,�5 0,10 - 0,40 0,15 - 0,45 < 0,030 < 0,030 11,0 - 1�,0 - - W 0,60 - 0,80 1000 - 850 800 - 840 < �55 950 - 980 O/A/WB 180 - �50 64 63 6� 60 58 561.�550 60 WCrV 7 S1 0,55 - 0,65 0,50 - 0,70 0,15 - 0,45 < 0,030 < 0,030 0,90 - 1,�0 - 0,10 - 0,�0 W 1,80 - �,10 1050 - 850 710 - 750 < ��5 870 - 900 O/WB 180 - 300 60 60 58 56 5� 481.�767 X 45 NiCrMo 4 - 0,40 - 0,50 0,10 - 0,40 0,15 - 0,45 < 0,030 < 0,030 1,�0 - 1,50 0,15 - 0,35 - Ni 3,80 - 4,30- 1050 - 850 610 - 650 < �60 840 - 870 O/A/WB 160 - �50 56 56 54 50 46 4�

High speed steels

Description Analysis in % Heat treatmentMaterial DIN SAE/AISI C Si Mn P S Co Cr Mo V W Warm forming

temperature [°C]Soft annealing [°C] Brinell hardness

HB30 soft annealedHardening process

Preheating [°C] Preheating 1. Level [°C]

Preheating �. Level [°C]

Hardening [°C] Quenching medium¹)

Tempering [°C] Temperinghardness [HRC]

1.3�0� S 1� - 1 - 4 - 5 T15 1,30 - 1,45 < 0,45 < 0,40 < 0,030 < 0,030 4,50 - 5,00 3,80 - 4,50 0,70 - 1,00 3,50 - 4,00 11,5 - 1�,5 1100 - 900 780 - 810 �40 - 300 450 - 600 850 1050 1�10 - 1�50 O/WB/A 550 - 570 < 651.3�43 S 6 - 5 - � - 5 M41 0,88 - 0,96 < 0,45 < 0,40 < 0,030 < 0,030 4,50 - 5,00 3,80 - 4,50 4,70 - 5,�0 1,70 - �,00 6,00 - 6,70 1100 - 900 790 - 8�0 �40 - 300 450 - 600 850 1050 1�00 - 1�40 O/WB/A 550 - 570 < 641.3�55 S 18 - 1 - � - 5 T4 0,75 - 0,83 < 0,45 < 0,40 < 0,030 < 0,030 4,50 - 5,00 3,80 - 4,50 0,50 - 0,80 1,40 - 1,70 17,5 - 18,5 1150 - 900 8�0 - 850 �40 - 300 450 - 600 850 1050 1�60 - 1300 O/WB/A 550 - 570 < 641.3343 S 6 - 5 - � M� 0,86 - 0,94 < 0,45 < 0,40 < 0,030 < 0,030 - 3,80 - 4,50 4,70 - 5,�0 1,70 - �,00 6,00 - 6,70 1100 - 900 790 - 8�0 �40 - 300 450 - 600 850 1050 1190 - 1�30 O/WB/A 550 - 570 < 64

¹) W = Water, WB = Warmbath, O = Oil, A = Air, Temperatures acc. to steel manufacturer²) Surface hardness after case hardening

35

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