high temperature brazing alloys

7/27/2019 High Temperature Brazing Alloys

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Johnson Matthey Metal Joining - High Temperature Brazing Alloys


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Index Page

About Johnson Matthey 4

About Johnson Matthey Metal Joining 5

Pallabraze Alloys 6

Orobraze Alloys 7

Silver Brazing Alloys 8

Nickel Based Alloys 9

Argentel and Bronze Alloys 10

Copper Based Alloys 11

High Temperature Brazing Fluxes 12

Product Availability 13

Precious Metal Brazing Materials Reference Chart 14

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Johnson Matthey plc

Johnson Matthey is a world leader in all aspects of precious metals technology.

Building on 180 years of expertise in assaying and refining, the name of

Johnson Matthey has become synonymous with the highest levels of quality and

customer service.

Today Johnson Matthey has worldwide businesses in Chemicals and Catalysts,

Precious Metals and Colours and Coatings. The Company is continually changing and

developing new technologies to meet the current and future needs of our customers.

Johnson Matthey is a key supplier to many of the worlds automotive and

aerospace companies.

Johnson Matthey Metal Joining

High Temperature Brazing Processes

Johnson Matthey use global sourcing and

manufacturing capabilities to offer the

widest range of High Temperature Brazing

Alloys. These materials have a many

applications. They are used for aerospace,

automotive or electronic components.

Some have found special applications in

mining or drilling equipment or in chemical

and engineering industries.

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About Johnson Matthey - Metal Joining

Johnson Matthey have over 70 years experience in the brazing and soldering industry and have a global manufacturing capability. Our aim is

to provide our customers with value for money whilst maintaining our renowned product quality and service. We recognise that customers

face ever increasing challenges, and we intend to offer full technical product support.

When you buy our products, you will receive not only the best quality, but also a solution to your brazing and soldering requirements.

We serve customers in all industry sectors, from aerospace and electronics to mining and drilling. Our product range has evolved to meet

their needs. We actively look to work in partnership with customers, the goal often being to increase the efficiency of their brazing and

soldering processes.

Johnson Matthey constantly monitor advances in materials technology using the expertise of our sites worldwide as well as that of our

partners in the industry. This combined expertise enables us to offer the best solutions to metal joining problems and in many cases

significantly reduces process costs.

Johnson Matthey - Metal Joining Quality

All branches of Metal Joining have been accredited with ISO 9002 and numerous customer quality approvals.

Certification to national and international standards is available and all our products are supported by full COSHH documentation.

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High TemperatureBrazing Processes


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Introduction

Johnson Mattheys Pallabraze range of alloys are manufactured to vacuum grade purity standards. In addition to traditional aerospace and electronics

applications they have been used in the glass and chemical industries where increased resistance to corrosion and chemical attack makes them a good choice.

Physical Properties of the Alloys

Composition (%) Melting Standards

Name Pd Ag Cu Ni Range C BS1845:1984 EN 1044:1999

Pallabraze 810 5 68.5 26.5 - 807 - 810 PD1V PD106



Pallabraze 880 15 65 20 - 856 - 880 PD4V PD103



Pallabraze 1010 5 95 - - 970 - 1010 PD7V PD204

Pallabraze 1090 18 - 82 - 1080 - 1090 PD8V PD203

Pallabraze 1225 30 70 - - 1150 - 1225 - -

Pallabraze 1237 60 - - 40 1237 - 1237 PD14V PD201

Impurity levels Refer to EN1044:1999 or Johnson Matthey technical department for more details.

Features of the range

Pallabraze AlloysPalladium based brazing alloys

Joints brazed with Pallabraze alloys have good oxidation resistance and

improved mechanical strength at elevated temperatures. For example

Pallabraze 810 shows resistance up to 500C and Pallabraze 1237 offers

effective oxidation resistance up to 700C.

Pallabraze alloys offer good corrosion resistance and show excellent

resistance to interfacial corrosion when brazing ferritic and austenitic

stainless steels.

Pallabrazes exhibit minimal errosion on ferrous and nickel-bearing alloys

during brazing.

Palladium-bearing alloys do not cause 'stress cracking' and are

recommended on iron-nickel-cobalt alloys.

Pallabrazes are free from volatile constituents making them particularly

useful in vacuum applications such as electronic valve and power tube

construction.

The narrow melting ranges of the Pallabraze alloys enables complex

components to be assembled by a step brazing.

Pallabrazes have excellent flow and penetration qualities but are also

capable of filling joint gaps up to 0.5mm.

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Orobraze AlloysGold based brazing alloys

Introduction

Johnson Matthey supplies a wide range of high purity Gold brazing alloys. These are manufactured to the highest quality to meet the needs of the aerospace and

electronics industries. In addition to the alloys shown below JM are able to supply most gold bearing brazing materials available today.


Composition (%) Melting Standards

Name Au Cu Ni Other Range C BS1845:1984 EN 1044:1999 AMS/AWS A5.8

Orobraze 845 60 20 - 20Ag 835 - 845 - - -

Orobraze 910 80 19 - 1Fe 908 - 910 AU1V AU101 -

Orobraze 940 62.5 37.5 - - 930 - 940 AU2V AU102 -

Orobraze 950 82 - 18 - 950 - 950 AU5V AU105 4787/BAu-4

Orobraze 970 50 50 - - 955 - 970 - -

Orobraze 990 75 - 25 - 950 - 990 AU6V AU106 -

Orobraze 998 37.5 62.5 - - 980 - 998 AU3V AU103 BAu-1

Orobraze 1005 35 65 - - 970 - 1005 -

Orobraze 1018 30 70 - - 996 - 1018 AU4V AU104 -

Orobraze 1030 35 62 3 - 1000 - 1030 - - BAu-3

Orobraze 1040 70 - - 30Ag 1030 - 1040 - - -

Impurity levels Refer to EN 1044:1999 or Johnson Matthey technical department for more details.


Gold-Copper Orobrazes

Gold-copper Orobrazes exhibit exceptional resistance to corrosion and

strength at elevated temperatures.

Gold-copper Orobrazes can produce ductile joints without excessive

inter-alloying between the brazing alloy and the parent material. This is

advantageous when brazing thin-walled structures.

Gold-copper Orobrazes exhibit good wetting on copper, nickel, iron, cobalt,

molybdenum, niobium, tungsten and their alloys.

The gold-copper Orobrazes are ideal for use in vacuum devices that operate

at elevated temperatures as they contain no volatile elements.

Gold-NickeI Orobrazes

Nickel-bearing Orobrazes exhibit increased high temperature strength and

resistance to oxidation at elevated temperatures compared to gold-copper

alloys.

These alloys offer good corrosion resistance in many chemical environments.

Alloys such as Orobraze 950 find extensive application in the manufacture of

aeroengine components.

Gold-nickel Orobrazes exhibit flow characteristics superior to the gold-copper

Orobrazes on nimonics, super-alloys and stainless steel.

Orobraze alloys exhibit a number of well-defined melting ranges which make

them suitable for step brazing.

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Introduction

Johnson Matthey Metal Joining supply a range of special silver brazing alloys. In this range are a number of alloys which are designed for or can be used in furnace

brazing applications. Some like Silver Copper Eutectic, IN10 and IN15 are designed to meet the high purity requirements of the electronics industry, whilst others

are designed for specific applications.


Composition (%) Melting Alloy Specification

Ag Cu In other Range C EN1044:1999 / BS1845:1984 / AWS A5.8

Silver 99.9 - - - 960 -

Standard Silver 92.5 7.5 - - 805-890 -

Silver-Copper Eutectic 72 28 - - 778 EN1044:1999 AG401 / BS1845:1984 AG7V*

IN 10 63 27 10 - 685 - 730 *

IN 15 61 24 15 - 630 - 705 *

RTSN 60 10 - 10 Sn 602 - 718 AMS4773 / B-Ag 18

85/15 Ag/Mn 85 - - 15 Mn 960 - 970 EN1044:1999 AG501 / BS1845:1984 AG19 / B-Ag 23

DHE310 54 40 - 5Z n,1 Ni 718 - 857 AMS4772 / B-Ag 13

*Impurity levels Refer to EN 1044:1999 or Johnson Matthey technical department for more details.


Silver and Standard Silver can be used for the furnace brazing of Titanium.

Silver Copper Eutectic is widely used for the brazing of metal to metallized alumina ceramics used in electronic components. The most

commonly used metals are Nilo K (Kovar) type alloys which are used because their thermal expansion closely matches that of alumina.

These alloys are prone to intergranular penetration by Silver-Copper Eutectic. This tendency is generally avoided by nickel plating the

components or by using a silver-copper-palladium alloy such as Pallabraze 810. Silver copper eutectic has excellent flow characteristics.

The flow characteristics of IN10 and IN15 are more sluggish than Silver-Copper Eutectic and liquation (a separation of the metallurgical

phases of the brazing alloy) may occur if a protracted heating cycle is used. IN10 and IN15 have similar applications to Silver-Copper

Eutectic. They are used where a lower brazing temperature is desirable, or step brazing with Silver-Copper Eutectic is required

RTSN is an alloy for furnace or vacuum brazing with good corrosion resistance in marine environments.

85/15 Ag/Mn is used for the joining of steel and stainless steel assemblies in contact with ammonia, where copper containing materials

are not acceptable.

DHE 310 is used in furnace brazing where fast heating rates are possible to avoid liquation.

Silver Brazing AlloysFor Special Brazing Applications

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Silver Alloys

RTSN

IN 10

IN 15

85/15 Ag/Mn

DHE 310

Silver Copper

Eutectic


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Introduction

Nickel based brazing alloys provide exceptional resistance to chemical corrosion and oxidation coupled with high strength at elevated temperatures. The alloys in

this range have a variety of compositions that result in differing melting ranges, alloy flow, brazing and joint characteristics.

These alloys are widely used particularly within the Aerospace and Nuclear industry. Vacuum brazing and controlled atmosphere brazing (pure dry Hydrogen or

Argon) are the most common heating methods used.

They are often used to join stainless steel (300 and 400 series) as well as nickel and cobalt base alloys. In addition carbon and low alloy steels and copper can be

brazed with selected nickel based brazing alloys.


Alloy Composition Melting Specifications

Name Ni Cr Fe B Others Range C BS1845 1984 AMS / AWS EN1044 1999

HTN1 Bal 14 4.5 3.1 Si 4.5,C 0.7 980-1060 HTN1 4775/BNi-1 NI101

HTN1A Bal 14 4.5 3.1 Si 4.5 980-1070 HTN1A 4776/BNi-1a NI1A1

HTN2 Bal 7 3.0 3.1 Si 4.5 970-1000 HTN2 4777/BNi-2 NI102

HTN3 Bal - 0.5 3.1 Si 4.5 980-1040 HTN3 4778/BNi-3 NI103


HTN5 Bal 19 - - Si 10.1 1080-1135 HTN5 4782/BNi-5 NI105

HTN6 Bal - - - P 11 875 HTN6 BNi-6 NI106

HTN7 Bal 14 - - P10.1 890 HTN7 BNi-7 NI107

Alloys are available in powder and paste form. Melt spun foils, tapes and preforms can be supplied. Aerospace and aero-engine approved materials. Special alloys

and product forms are possible.


HTN1 produces high strength, oxidation and corrosion resistant parts and is useful in highly stressed components. Typical joint gaps are 0.05-0.12mm.

HTN1a has a restricted carbon content and is used for similar applications to HTN1. Typical joint gaps are 0.15mm.

HTN2 is the first choice for many applications except very thin walled assemblies. Good alloy flow allows joint clearances of 0.025-0.1mm.

HTN3 is again similar to HTN1 but finds applications in marginal brazing atmospheres offering good flow where tight joint tolerances are encountered.

HTN4 has a wide melting range which can produce large, ductile fillets. Suitable for brazing components where tight joint tolerances are not possible.

HTN5 is used for high strength, oxidation resistant joints that can operate at elevated temperatures. Joint gaps up to 0.1mm.

HTN6 is a free flowing alloy that can be used on Fe and Ni alloys and low chromium steels in exothermic atmospheres. Contact joint gaps are required.

HTN7 is used on thin walled structures and on high temperature components. It shows low erosion on Fe and Ni alloys. Contact joint gaps are required.

Nickel Based AlloysHigh Temperature Furnace Brazing

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HTN 1

HTN 1a

HTN 2

HTN 3

HTN 4HTN 5

HTN 6

HTN 7


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Introduction

JM Argentel alloys are used in the braze or bronze welding processes. In this process some penetration of the filler metal may be obtained into the capilliary gaps

between the components being joined. However strength is achieved in the joint by building up a fillet of the braze metal. Today the widest use for these alloys is

in brazing of steels and tungsten carbide.

JM Bronze alloys are a range of special alloys designed for high temperature brazing of steel and carbide components. Each has specific alloy characteristics and uses.


Nominal Composition Melting Standards

Alloy Cu Zn Mn Ni Other Range C BS1845:1984 EN1044:1999

Argentel No 1 60 Bal - - 0.2Si 875-895 CZ6 CU301

Argentel 48 42 - 10 - 920-980 CZ8 CU305

B-Bronze 97 - - 3 0.03 B 1081-1101 CU7 CU105

C-Bronze 86.5 - 11 2.5 - 965-995 - -

F-Bronze 57.5 38.5 2 - 2 Co 890-930 - -

D-Bronze 86 10 - - 4 Co 980-1030 - -

Features of the Range

JM Argentel Range of Brazing Alloys

Argentel No. 1 is widely used in the joining of mild steel, galvanised steel, cast iron and some copper alloys.

Argentel is a nickel containing alloy and gives extremely strong joints on stainless and mild steels and cast iron.

JM Bronze Range of Brazing Alloys

B Bronze see page 11 for details of this alloy.

C Bronze - has good gap-bridging properties in the range 0.025 mm up to 0.75 mm and offers excellent resistance to interfacial

corrosion when used on ferritic or austenitic stainless steels. Due to the manganese content the alloy requires a furnace atmosphere

with a dew point better than - 40C. It is also used in vacuum brazing provided a partial pressure of argon is applied. If required

C Bronze can be brazed in air using Tenacity 125 as a flux.

D Bronze is used in the brazing of rock drills where its good wetting properties and strength coupled with an ability to allow heat

treatment of the drill shank at temperatures between 800 - 1000C. The alloy is frequently induction brazed in air with Tenacity 125 flux.

F Bronze is used to braze tungsten carbide into rock drills or similar equipment. It is harder than D Bronze and is used where the heat

treatment of the steel drill shank is temperature critical. Induction or flame heating with Tenacity 125 flux are usually used.

Argentel and Bronze AlloysBase metal brazing alloys

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Argentel No 1

B Bronze

D Bronze

F Bronze

C Bronze

Argentel


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Copper Based AlloysHigh Temperature Furnace Brazing

Introduction

Johnson Matthey supply a series of high temperature copper base alloys. These alloys are used for brazing in reducing atmosphere belt furnaces and in vacuum

furnaces. They are available in a variety of forms and are designed to meet the needs of a range of customers from commercial jobs to more demanding

automotive or aerospace applicatons.


Alloy Composition Melting Specification

Cu Ni Sn Other Range C EN1044:1099 / AWS A5.8 / BS1845:1984

Pure Copper Copper 99.9 - - - 1085 CU101 / BCu-1 / CDA 110 / CU2

Copper 99.95 - - - 1085 CU102 / CU3

JM Bronze Alloys B Bronze 97 3 - 0.03 Boron 1081-1101 CU7

C Bronze 86.5 2.5 - 11 Mn 965-995 -

Copper Tin Alloys 92/8 91.75 - 8 0.25 P 882-1027 CDA 521

97/3 97 - 3 - 980-1070 -

96/4 96 - 4 - 950-1060 -

Some Features of the Range

Copper Alloys can be supplied as rings washers, pastes or preform shapes to speed up furnace brazing.

B Bronze was developed for furnace brazing of stainless steel under reducing atmospheres where the joint gaps involved cannot

be closely controlled. It will penetrate joint gaps ranging from an interference fit up to 0.5 mm. The joints produced with this alloy

in both ferritic and austenitic steels exhibit excellent resistance to interfacial corrosion.

B Bronze is ideal for the brazing of mild steels where the gaps are too large for the use of copper (i.e. over 0.025 mm).

Copper Tin Alloys are used in the furnace brazing of mild steel and offer good gap filling properties. A variety of copper-tin

compositions are available.

Johnson Matthey supply a range of copper brazepastes in addition to those shown below. They have been designed operate in

different furnace atmospheres and have different brazing characteristics. Consult a technical representative for more details and

product datasheets.

CU 503 Brazepastes is a Copperpaste loaded with Copper Oxide, this is to help the flow in difficult atmospheres and also may help

to prevent "sooting". JM CU 521 is an alternative to CU 503 filling gaps up to 0.10mm.

CU 510 Brazepastes is used for most applications, normally used in atmospheres of Nitrogen and/or Hydrogen.

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Copper Alloys

Copper Tin Alloys

Copper Brazepastes

CU 503 Brazepastes

CU 510 Brazepastes

B Bronze


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High Temperature Brazing FluxesIntroduction

Flux plays a vital role in virtually all air brazing processes. Use of the wrong flux or a poor application technique can have a dramatic effect on joint quality.

Johnson Matthey produce a range of fluxes suitable for most air brazing operations. Many of the brazing alloys in this booklet are designed for furnace brazing

operations where an inert or protective atmosphere means that no flux is required. For high temperature brazing operations in air a JM Tenacity flux can be

considered. The information shown here is intended to help the user select the most suitable Johnson Matthey High Temperature Flux for a particular application.

Details of Johnson Matthey Metal Joinings complete range of fluxes including general purpose and medium temperature fluxes can be found in the Silver Brazing

Alloys and Fluxes Booklet.

High Temperature Fluxes

Flux Form Working EN 1045 Standard Flux Residue Removal

Range C* Packaging (kg)

Tenacity 5 Powder 600-900 FH10 0.25 0.5 5.0 Residues are insoluble in water. Remove using NaOH solution or mechanical methods.

Tenacity No.125 Powder 750-1200 FH21 0.4 4.0 Residues are insoluble in water. Grit blasting or mechanical removal is necessary.

Tenacity No. 125 Paste 750-1200 FH21 0.7 Residues are insoluble in water. Grit blasting or mechanical removal is necessary.

Tenacity No. 12 Powder 800-1300 FH21 0.5 5.0 Residues are insoluble in water. Grit blasting or mechanical removal is necessary.

Tenacity No.20 Powder 750-1100 FH21 0.5 Residues are insoluble in water. Grit blasting or mechanical removal is necessary.

* The lower figure is the temperature at which the flux is capable of removing metal oxide. The upper figure is the maximum temperature at which the flux will

remain effective long enough to make a sound brazed joint

Features of the Range

Tenacty 5 is active at 600C above which temperature it spreads and cleans rapidly and is effective with alloys with a liquidus up to850C. Tenacity No. 5 is particularly recommended when brazing stainless steel at temperatures above 700C and also for brazing large

assemblies in steel or copper wherever prolonged heating is necessary.

Tenacity No. 125 is high temperature flux which is effective on copper and copper based alloys, mild and low alloy steels and tungsten

carbide with alloys melting between 800-1100C. It can therefore be used with the JM Argentel and Bronze alloys shown on page 10.

Tenacity No. 12 is effective on copper and copper based alloys, mild steel and tungsten carbide when used with brazing alloys melting

between 850-1200C.

Tenacity 20 is used for brazing or bronze welding of mild steel components using Argentel alloys.

It is recommended that flux should be applied as a paste to the parts to be joined. Powders can be made into pastes by stirring in

water until the mixture has the consistency of thick cream. A few drops of liquid detergent added to the mixture will often improve

the wetting of flux onto clean parent metals.The flux should be applied to both joint surfaces before assembly. Application of flux after

assembly places great demands on the fluidity of the molten flux and its ability to penetrate capillary joints. Brushing is an effective

method of applying a thin film of paste to the joint itself and to surrounding component surfaces.

More information on fluxes is available in Silver Brazing Alloys and Fluxes or on www.jm-metaljoining.com.12

Tenacity No 5

Powder

Tenacity No 12

Powder

Tenacity No 20

Powder

Flux Application

Tenacity No 125

Powder & Paste


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Johnson Matthey hold a very broad range of products in stock at our sales offices.

However many of the items detailed in this booklet are manufactured to customers

orders. If we dont carry an item that you use regularly please let us know.

The brazing alloy ranges can be manufactured in a variety of different product forms.

Wire

Wire is available either in loose coils or on reels. (Not applicable to

Nickel Brazing alloys).

Foil

Foil can be supplied on lose coils or on reels.

Sizes can usually be made to order.

Nickel based brazing alloys can also be supplied as tapes.

RodsBrazing alloys can be supplied in rod form. (Not applicable to Nickel

Brazing alloys).

Strips

Strips can be made to order. (Not applicable to Nickel Brazing alloys).

Washers and preformed shapes

All pre-formed shapes are made to order.

A wide range of shapes including washers, clips, blocks and many foil

shapes are possible.

Rings

All brazing rings are manufactured to order. (Not applicable to Nickel

Brazing alloys).

They are made butt ended or more commonly with ends offset.

Rings can be made in a vast range of sizes and from a wide range of wires.

Brazepastes and Powders

JM supply a complete range or brazepastes.

All alloys can be produced as paste or powder.

Refer to JM booklet Brazepastes and Solderpastes for more details.

Product packaging

JM brazing materials can be packed according to customer requirements.

Quality Proceedures

All branches of Metal Joining have been accredited with ISO 9002 and numerouscustomer quality approvals.

Certification to national and international standards is available and all our products

are supported by full COSHH documentation.

Please contact your local JM office to discuss any matter relating to

quality of our products or services.

Product Availability

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Reference Chart

High Tempreature Brazing Materials Reference ChartPalladium Based Brazing Alloys

Pd Ag Cu Ni Others Melting RangeC BS1845:1984 EN1044:1999

Pallabraze 810 5 68.5 26.5 - - 807-810 PD1V PD106



Pallabraze 880 15 65 20 - - 856-880 PD4V PD103



Pallabraze 1010 5 95 - - - 970-1010 PD7V PD204

Pallabraze 1090 18 - 82 - - 1080-1090 PD8V PD203

Pallabraze 1225 30 70 - - - 1150-1225 - -

Pallabraze 1237 60 - - 40 - 1237-1237 PD14V PD201

Gold Based Brazing AlloysAu Cu Ni Others Melting RangeC BS1845:1984 AMS /AWS EN1044:1999

Orobraze 845 60 20 - 20Ag 835-845 - - -

Orobraze 910 80 19 - 1 Fe 908-910 AU1V - AU101

Orobraze 940 62.5 37.5 - - 930-940 AU2V - AU102

Orobraze 950 82 - 18 - 950-950 AU5V 4787/BAu-4 AU105

Orobraze 970 50 50 - - 955-970 - - -

Orobraze 990 75 - 25 - 950-990 AU6V - AU106

Orobraze 998 37.5 62.5 - - 980-998 AU3V BAu-1 AU103Orobraze 1005 35 65 - - 970-1005 - - -

Orobraze 1018 30 70 - - 996-1018 AU4V - AU104

Orobraze 1030 35 62 3 - 1000-1030 - BAu-3 -

Orobraze 1040 70 - - 30 Ag 1030-1040 - - -

Precious Metal Brazing Alloys - 1100-1300CAg Au Cu Ni Pd Other Melting RangeC Comment

- 92 - - 8 - 1200-1270 For brazing W, Mo, Ta, and superalloys. It is oxidation resistant and ductile.

- - - - 65 35 Co 1219 For brazing stainless steel, Mo, W, Ni. and superalloys. High strength,

48.5 - 19 10 22.5 - 910-1179 For brazing stainless steels. A ductile alloy for filling wide gaps.

- 30 - 36 34 - 1135-1169 For superalloys. A high strength oxidation resistant alloy. AMS-4785

- 50 - 25 25 - 1102-1121 For superalloys. A high strength oxidation resistant alloy. AMS-4784

Precious Metal Brazing Alloys - 1000-1100CAg Au Cu Ni Pd Other Melting RangeC Comment75 - - - 20 5 Mn 1008-1072 For brazing superalloys and tungsten carbide.

90 - - - 10 - 1025-1070 For brazing Ni, Mo, W, stainless steel and fast braze cycles on titanium.

- 25 31 18 15 11 Mn 1017-1052 For brazing super alloys and tungsten carbide.

- 70 - 30 - - 960-1050 Excellent wetting, flow, strength, oxidation resistance, ductility.

- 70 - 22 8 - 1005-1037 For brazing superalloys and stainless steel. AMS-4786

- 20 78 - - 2 In 975-1025 Alternative to Orobraze 1030 and higher gold content Au-Cu alloys.

- 25 37 10 15 13 Mn 970-1013 For brazing of superalloys and tungsten carbide.

- 73.8 - 26.2 - - 980-1010 For brazing of stainless steel and superalloys. For loose tolerances.

Precious Metal Brazing Alloys - 900-1000CAg Au Cu Ni Pd Other Melting RangeC Comment

- 35 31.5 14 10 9.5 Mn 971-1004 For brazing of super alloys and tungsten carbide.

- 40 60 - - - 980-1000 For brazing of Cu, Ni, Kovar and Mo-Mn metallised ceramics.

- 72 - 22 - 6 Cr 975-1000 For brazing of diamond to stainless steel. It is corrosion resistant.- - - Bal 30 10.5 Cr, 2.4 B 941-977 Better creep resistance than Orobraze 950 at elevated temps.

- - - Bal 36 10.5 Cr, 0.5 Si 3B 820-960 Better creep resistance than Orobraze 950 at elevated temps.

- 31 Bal 9.75 9.75 16 Mn 927-949 For brazing of super alloys and tungsten carbide.

- 81.25 - 18 - 0.75 Ti 945-960 Excellent for difficult to wet materials.

- 81.5 16.5 2 - - 910-925 For brazing Cu, Ni and Mo-Mn metallised ceramics. Remains ductile.

- 60 37 - - 3 In 860-900 Lower brazing temperatures than Au/Cu series.

Precious Metal Brazing Alloys - below 900CAg Au Cu Ni Pd Other Melting RangeC Comment

5 75 20 - - - 885-895 Narrow melting range useful in step brazing.

- - - Bal 45.5 5 Co, 5 Si, 4.5 Mo 847-895 Available as a melt spun foil only.

82 - - - 9 9 Ga 845-880 For brazing of Ti to Ti and stainless steel. Ductile and corrosion resistant.

- - - 47 47 6 Si 810-851 Better creep resistance than Orobraze 950 at elevated temps.

68.8 - 26.7 - - 4.5 Ti 830-850 Wets almost every material including ceramics metals and graphite.

95 - - - - 5 Al 780-830 Forms ductile joints particularly with alloys containing Aluminium.

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NOTE:Johnson Matthey PLC cannot anticipate all conditions under which this information and our products or the products of other manufacturers in combinationwith our products will be used.This information relates only to the specific material designated and may not be valid for such material used in combination with any other materials or in anyprocess. Such information is given in good faith, being based on the latest information available to Johnson Matthey PLC and is, to be best of Johnson MattheyPLC's knowledge and belief, accurate and reliable at the time of preparation. However, no representation, warranty or guarantee is made as to the accuracyor completeness of the information and Johnson Matthey PLC assumes no responsibility therefore and disclaims any liability for any loss, damage or injuryhowsoever arising (including in respect of any claim brought by any third party) incurred using this information. The product is supplied on the condition thatthe user accepts responsibility to satisfy himself as to the suitability and completeness of such information for his own particular use. Freedom from patent orany other proprietary rights of any third party must not be assum

AcknowledgementsKepston Ltd. (Heat Treatment and Furnace Brazing) Wednesbury West Midlands for the use of Controlled atmosphere Furnace for Photographic purposes.

Silver Brazing Alloys For Special ApplicationsAg Cu In other Melting RangeC EN1044:1999 / BS1845: 1984 / AWS A5.8 / AMS

Silver 99.99 - - - 960 -

Silver-Cu Eutectic 72 28 - - 778 AG401 / AG7V - -

IN 10 63 27 10 - 685 - 730 - - -

IN 15 61 24 15 - 630 - 705 - - -

RTSN 60 30 - 10 Sn 602 - 718 - B-Ag 18 AMS 4773

85/15 Ag/Mn 85 - - 15 Mn 960 - 970 AG501 / AG19 B-Ag 23 AMS 4766

DHE310 54 40 - 5Zn, 1Ni 718 - 857 - B-Ag 13 AMS 4772

Argo-Braze 7 7 85 - 8Sn 662 - 984 - - -

AMS 4765 56 42 - 2Ni 771 - 893 - B-Ag 13a AMS 4765

AMS 4774A 63 28.5 - 2.5Ni 691 - 802 - - AMS 4774A

Active Brazing AlloysAg Au Cu Ti Other Melting RangeC

Gold - 96.4 - 0.6 3 Ni 1003-1030

Copper - - 92.75 2.25 Al 2 Si 3 958-1024

Silver 92.75 - 5 1.25 Al 1 860-912

Silver / Copper 68.8 - 26.7 4.5 - 830-850

Silver / Copper 63 - 35.25 1.75 - 780-815

Argentel and Bronze Base Metal Brazing AlloysCu Zn Others Melting RangeC BS 1845:1984 EN 1044 1999Argentel No.1 60 40 0.2 Si 875-895 CZ6 CU301

Argentel 48 42 10 Ni 920-980 CZ8 CU302

B Bronze 97 - 3 Ni 0.03B 1081-1101 CU7 CU105

C Bronze 86.5 - 2.5Ni 11Mn 965-995 - -

D Bronze 86 - 4 Co 10Mn 980-1030 - -

F Bronze 58 38 2 Co 2 Mn 890-930 - -

Copper Based Brazing AlloysCu Ni Sn Other Melting RangeC EN1044 1999 / AWS A5.8

92/8 91.75 - 8 0.25 P 882-1027 CDA 521 - -

97/3 97 - 3 - 980-1070 - - -

96/4 96 - 4 - 950-1060 CU201 - Brazepaste only

CU 511 80 - 20 - 800-980 - - Brazepaste only

CU 512 88 - 12 - 800-890 - - -Copper 99.9 - - - 1085 CU101 / BCu-1/ CDA110 -

Copper 99.95 - - - 1085 CU102 - -

CU510 / 513 99.9 - - - 1085 CU101 / BCu-1/ CDA110 Brazepaste only

CU535 / 557 99.4 0.6 - - 1085 - - Brazepaste only

CU503 32 - - 68 Cu2O 1085 BCu-1a / BCu-2 - Brazepaste only

CU521 32 0.6 - 68 Cu2O 1085 - - Brazepaste only

Nickel Based Brazing AlloysNi Cr Fe B Others Melting RangeC BS1845 1984 AMS / AWS A5.8 EN1044 1984

HTN1 Bal 14 4.5 3.1 Si 4.5 Co 0.7 980-1060 HTN1 4775/BNi-1 NI101

HTN1A Bal 14 4.5 3.1 Si 4.5 980-1070 HTN1A 4776/BNi-1a NI101

HTN2 Bal 7 3.0 3.1 Si 4.5 970-1000 HTN2 4777/BNi-2 NI102


HTN4 Bal - 1.5 1.8 Si 3.5 980-1070 HTN4 4779/BNi-4 NI104HTN5 Bal 19 - - Si 10.1 1080-1135 HTN5 4782/BNi-5 NI105

HTN6 Bal - - - P 11 875 HTN6 BNi-6 NI106

HTN7 Bal 14 - - P 10.1 890 HTN7 BNi-7 NI107

Aluminium Brazing AlloysAl Si Melting RangeC Specification

Alu-flo HT 88 12 577-582 4047 / BAlSi-3

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high temperature brazing alloys

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