appendix quality assurance agreement steel structure · one-sided fillet welds: a = 0.7 x smin smin...
TRANSCRIPT
Quality Assurance Agreement – Transporter Industry International GmbH – Page 1 of 28
QMA 9.103 – Version 1.0 – Status: 10/01/2017 TII Group initials: ______ Supplier initials: ______
Appendix Quality Assurance Agreement Steel structure
This quality assurance agreement is agreed between a company of Transporter Industry International Group; this corresponds to:
SCHEUERLE Fahrzeugfabrik GmbH – Otto-Rettenmaier-Strasse 15 – D-74629 Pfedelbach and/or KAMAG Transporttechnik GmbH & Co. KG – Liststrasse 3 – D-89079 Ulm and/or
NICOLAS Industrie S.A.S. – RN 6 BP 3 – F-89290 Champs-sur-Yonne TII INDIA Private Limited – Plot2, Sector 14, Phase-II – IMT Bawal – Haryana, 123501 India
(hereinafter “TII Group ”)
Table of contents
1. QUALITY ASSURANCE FOR STEEL CONSTRUCTION 2
1.1. QUALITY OF WELDED ASSEMBLIES 3
1.1.1. WELDING CONSUMABLES 6
1.1.2. USE OF MATERIALS 7
1.2. QUALITY OF PRODUCTION 9
1.2.1 LASER CUTTING TOLERANCES 10
2.2.2 CORROSION PROTECTION OF MACHINED SURFACES 10
1.3. QUALITY OF THE COATING 11
1.3.1. AREA OF APPLICATION 11
1.3.2. NORMATIVE REFERENCES 11
1.3.3. PREPARATION 12
1.3.4. PRIMING (FIRST LAYER) 15
1.3.4. SEALING OF BLANK SPOTS 16
1.3.5. PRIMING (SECOND LAYER) 16
1.3.6. TOP COAT 17
1.3.7. DRYING TIME AND TEMPERATURE 17
1.3.8. TEST METHODS 17
1.4. QUALITY OF ASSEMBLY 19
1.4.1. SCREW CONNECTIONS AND USE OF SCREW-LOCKING ELEMENTS 28
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1. Quality assurance for steel construction
Quality requirements of EN 729-2
This class applies to the production of parts with high static or dynamic loads or high
safety requirements, such as for main beams, wheel bogies, rocker arms, steering
parts and steering head carriers (material S 690 < to S 960)
Quality requirements of EN 729-3
This class applies to the manufacture of parts with normal static or dynamic loads
and average safety needs, such as for the main beam of S355J2G3 (previously St
52-3N), cross beam, underride protection device, deck extension arm, ...
Quality requirements of EN 729-4
This class applies to the manufacture of parts with low stress and low need for
safety, such as for lamp supports, covers, support elements for bridges, ...
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1.1. Quality of welded assemblies
All welders must have a valid welder certification according to ISO 9606
(formerly: DIN EN 287). They may only weld materials for which they are approved.
The TII Group has the right to inspect the relevant documents.
Sheets and flame-cut blanks must meet the following standard specifications and
requirements:
Standards, requirements Area Subject
EN 10204
• Inspection certificate 3.1
“Material test certificates” • Sheets
• Cuts
DIN EN 10029
• Thickness tolerances according to
tab. 1, class B
• Flatness according to tab. 4:
• Steel group L, tolerance class N
• Steel group H, tolerance class N
“Hot-rolled steel plates 3 mm
thick or above – Limit
deviations, shape tolerances,
allowable weight deviations”
• Sheets
• Cuts
DIN EN 10163 – 2
• Surface cleanliness according to
tab. 4 class B, subassembly 2
• Rust and scale-free surface
“Delivery requirements for the
surface condition of hot-rolled
steel products (sheet, wide flat
steel and profiles)”
• Sheets
• Cuts
ISO 9013 (replacement for DIN 2310
Part 3)
• Flame-cut blanks ISO 9013-331
“Welding and related processes
– Quality classification and
dimensional tolerances for
autogenic flame-cut surfaces”
• Cuts
EN 287-1 certified welders Welder certification • Welding work
DIN EN ISO 5817 assessment group B Visual inspection • Execution quality of the
welding job
DIN EN ISO 13920 AE General tolerances for welded
structures, degree of accuracy
• Untolerated dimensions
with welded structures
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DIN EN ISO 9692 Weld preparation • Weld preparation for fully
connected cross-sections
of butt welds and fillet
welds and a collection of
proven sizes and shapes
When performing welding work on the TII Group, all principles included in DIN EN
ISO 729-2/3 must be considered to ensure the quality of welding of metallic
materials.
As other applicable standards in EN 729-3, item 2, “References to standards”, are
applicable, insofar as they are relevant.
This means:
Equipment of the company in terms of personnel and technology which ensures work
that is professional and state-of-the-art:
Correct selection of the welding process suitable for the application with the
parameters:
• Heat treatment: Preheating, heat treatment, if appropriate;
• Weld preparation (opening angle, joint shapes, metallic bare edges). If no details are
given for welding seams, DIN 8551 applies.
• Suitable equipment and correct operating data
(welding equipment, tools, devices, drying ovens, power source, welding wire diameter,
polarity, amperage, gas pressure, seam structure, ...);
• Operating and accessory materials (welding wire, protective gas, ...);
• Care when tacking and assembling (no misalignment, correct
• air gap, length and spacing of the tack welds);
• Correct welding sequence, position and speed
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Only plates with inspection certificates according to EN 10204-3.1 are to be used.
For all other steel semi-finished products, either a manufacturer’s certificate 2.1, a
test report 2.2, or an inspection certificate 3.1 according to EN 10204.
For welding specifications not dimensioned on the drawing, the following applies:
Butt joints: a = Smin
One-sided fillet welds: a = 0.7 x Smin
Smin = smallest that is to be welded
Double-sided fillet welds: a = 0.4 x Smin workpiece thickness
Smallest fillet weld thickness a = 3 mm
The proper welding sequence, position and speed are to be respected.
Only parallel beads are to be placed.
Downhand welding and oscillating are not allowed.
Intermediate inspections of the individual beads must be performed. Any defects that
are found must be eliminated immediately by proper reworking, such as grinding out
and rewelding.
Tack welds must be free of cracks. Tack welds on cross joints and corners must be
avoided.
After completion of the component, the accuracy of its dimensions according to the
drawing must be checked and a visual inspection for apparent defects (undercuts,
pores, cracks, end craters, electrode scrapers, arc strikes, tack welds...) must be
performed and any defects must be professionally removed.
Straighten parts if necessary.
Dress welds, remove weld spatter and round all sharp edges in general.
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Welded assemblies must be stamped (embossed). If no other specifications are
made by the TII Group, the company emblem, calendar week, year of manufacture
and build number in case of series production must be stamped. If the location of
identification is not defined on the drawing, the SQEs (supplier Quality Engineers)
are to be asked.
If there are uncertainties or questions before or during the execution of the work,
these need to be resolved with the SQEs in writing before further work.
If this does not happen, all of the named requirements are part of the contract and
binding for the quality inspection of the supplier.
The operation must be approved for the respective welding process. The following
procedures are used: MAG, E, UP, WIG, MIG
1.1.1. Welding consumables
(DIN EN 756, EN 440, DIN 1732 T1, EN 499)
Only consumables permitted for the material combination may be used.
Consumables must be stored and processed according to the consumable
manufacturer’s instructions.
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Supplier initials: ______
1.1.2. Use of materials
No. Material/
designation
Material
no.
Applicable
standard
Yield point
Re [N/mm 2] with thickness [mm]
Tensile strength
Rm [N/mm 2] with thickness [mm]
Impact
strength
Kv [J] at T[C]
Minimum
ultimate strain
A [%]
1 ≤16 16≤40 40≤100 3≤100
S235J2 1.0117 EN 10025-2 235 225 215 360-510 27 at -20° 21
2
≤16 16≤40 40≤63 63≤80 80≤100 ≤40 40≤63 63≤80 80≤100
S355M* 1.8823 EN 10025-4 355 345 335 325 325 470–630 450–610 440–600 440–600 27 at -30° 22
S355ML* 1.8834 EN 10025-4 355 345 335 325 325 470–630 450–610 440–600 440–600 27 at -50° 22
S355J2 +N 1.0577+N EN 10025-2 355 345 335 325 315 470–630 470–630 470–630 470–630 27 at -20° 17
3
≤16 16≤40 40≤63 63≤80 80≤100 ≤40 40≤63 63≤80 80≤100
S460M* 1.8827 EN 10025-4 460 440 430 410 400 540–720 530–710 510–690 500–680 27 at -30° 17
S460ML* 1.8838 EN 10025-4 460 440 430 410 400 540–720 530–710 510–690 500–680 27 at -50° 17
3≤50 50≤100 3≤50 50≤100
S460QL 1.8906 EN 10025-6 460 440 550–720 550–720 30 at -40° 17
4
8≤60 8≤60
Alform 700M* 700 770–1050 40 at -40° 10
<8 >8
S700MC* 1.8974 EN 10149-2 700 680 750–950 40 at -20°(EN 0149-1) 12
3≤50 50≤100 3≤50 50≤100
S690QL 1.8928 EN 10025-6 690 650 770–940 760–930 30 at -40° 14
5 3≤50 50≤100 3≤50 50≤100
S890QL 1.8983 EN 10025-6 890 830 940–1100 880–1100 30 at -40° 11
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No. Material/
designation
Materia
l
no.
Applicable
standard
Yield point
Re [N/mm 2] with thickness [mm]
Tensile strength
Rm [N/mm 2] with thickness [mm]
Impact
strength
Kv [J] at T[C]
Minimum
ultimate strain
A [%]
6
3≤50 50≤100 3≤50 50≤100
S960QL 1.8933 EN 10025-6 960 - 980–1150 - 30 at -40° 10
10≤15 10≤15
Alform 960M* 960 980–1150 30 at -40° 11
7
25-80 >80 25-80 >80
Ovako 225A**
(18MoCr6-8) 800 790 880–1080 880–1080 27 at -40° 12
<16 16≤40 40≤100 100≤160 160≤25
0 16≤40 40≤100 100≤160 160≤250
31CrMoV9 1.8519 EN10085 - 900 800 700 650 1100–1300 1000–1200 900–1100 850–1050 25 at RT 9
42CrMo4 1.7225 EN10083-3 900 750 650 550 500 1000–1200 900–1100 800–950 750–900 35 at RT 10
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1.2. Quality of production
The material in use must meet the following standard specifications and requirements:
Standards, requirements Standard headers
EN 10204
• Inspection certificate 3.1B or
after consultation with Scheuerle 2.3
also 2.2 (only for quenched and
tempered, case hardening and/or
hardened steels)
“Material test certificates”
EN 10163 Part 2
• Class B, subassembly 3
EN 10163 Part 3
• Class D, subassembly 3
Delivery requirements for surface conditions of hot-rolled
steel products
EN 10083 Part 2 Quenched and tempered steels:
Technical delivery conditions
DIN 17210 Hardening steels:
Technical delivery conditions
DIN ISO 2768 mK For non-tolerated dimensions and angles
DIN ISO 1302 Surface roughness
All important features on the drawing or in the order (such as tolerated dimensions, test
dimensions, shape and position tolerances) must be 100% tested and entered on a test report.
Test reports must be able to be assigned to components (e.g. serial number, build number,
etc.).
For the tests, only calibrated test equipment is to be used. The TII Group reserves the right to
perform sample testing of the test equipment used.
For parts made of quenched and tempered steel or hardened steel or with hardened parts in
general, the actual value of the strength (N/mm²) and the measured hardness in the scale
specified on the drawing (HRC, HB, etc.) must be entered on the measurement report.
If provision is made for a mark on the drawing or in the order, the parts are to be marked at the
specified position according to the instructions (company emblem/week/year/consecutive build
number).
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1.2.1 Laser cutting tolerances
If the following note can be found on a drawing...
... there are increased requirements for the tolerances of the workpieces for laser-cut plates.
(See table)
Dimensions in mm
2.2.2 Corrosion protection of machined surfaces
All machined surfaces of steel components such as boreholes, milled surfaces, threads, etc.,
must be protected against corrosion with Tectyl 846 . Components not preserved with Tectyl
846 will be rejected at goods receipt or complained about and billed for by our QA.
Workpiece
thickness
Nominal dimensions
0–3 3–10 10–35 35–
125
125–
315
315–
1000
1000–
2000
2000–
4000
4000–
6000
Tolerances
0–1 ± 0.1 ± 0.1 ± 0.1 ± 0.1 ± 0.2 ± 0.2 ± 0.3 ± 0.3 ± 0.3
1–3.15 ± 0.1 ± 0.1 ± 0.1 ± 0.15 ± 0.2 ± 0.25 ± 0.3 ± 0.4 ± 0.5
3.15–6.3 ± 0.1 ± 0.1 ± 0.15 ± 0.2 ± 0.3 ± 0.35 ± 0.4 ± 0.6 ± 0.8
6.3–20 - ± 0.3 ± 0.3 ± 0.4 ± 0.4 ± 0.5 ± 0.5 ± 0.8 ± 1.0
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1.3. Quality of the coating
1.3.1. Area of application
The purpose of this instruction is to ensure a uniform quality of surface preparation and
subsequent coating for corrosion protection. This instruction applies to the TII Group, all sub-
contractors and all suppliers. It covers all parts to be coated (wet coating structure).
1.3.2. Normative references
The documents cited below are required for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the
referenced document (including any amendments) applies.
DIN EN ISO 12944-4 Corrosion protection of steel structures by protective paint systems; Part
4: Types of surfaces and surface preparation
DIN EN ISO 8503-1 Surface roughness characteristics of blast-cleaned steel substrates: Part 1:
Specifications and definitions for ISO surface profile comparators for the assessment of
abrasive blast-cleaned surfaces
DIN EN ISO 2409 Paints and varnishes – Cross-cut test
DIN EN ISO 8504-2 Preparation of steel substrates before application of paints and related
products – Surface preparation methods – Part 2: Abrasive blast-cleaning
DIN EN ISO 8501-1 Preparation of steel substrates before application of paints and related
products – Visual assessment of surface cleanliness – Part 1: Rust grades and
preparation grades of uncoated steel substrates and of steel substrates after overall removal of
previous coatings
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1.3.3. Preparation
A. Preparation of steel components
All sharp edges must be rounded in general.
It must be ensured that all contaminants that cannot be removed through abrasive blast-
cleaning are removed beforehand. After cleaning, the steel components must undergo abrasive
blast-cleaning according to ISO 8501-1 The grade of the blasting media must be SA 2 ½. After
abrasive blast-cleaning, the surface must have a roughness depth of 40–60 µm. A suitable
protection (e.g. taping, wrapping, etc.) is applied to all components that are not to be painted.
Coating must be carried out promptly (after 3 hours at the latest)
Thermally cut parts should not have any oxide layer on the cut edges after preparation.
Exception: It must be ensured that the component is stored in a dry place and the humidity is
so low as to prevent formation of a rust film. If a rust film has developed after storage, it must be
removed by means of another abrasive blast-cleaning.
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B. Preparation before priming
The components requiring priming must be free of blasting media and dust. Prior to priming, the
components must be thoroughly cleaned with compressed air. Prior to priming, a suitable
protection (e.g. greasing, taping, wrapping, etc.) must be applied to all areas that are not to be
primed.
C. Preparation of top coat
The primed components must be thoroughly greased, cleaned and lightly ground. After grinding,
the resulting dust must be completely removed to ensure good adhesion. A suitable protection
(e.g. greasing, taping, wrapping, etc.) must be applied to all components that are not to be
painted.
If painting is performed directly after priming, light grinding is not necessary. Here, the interim
drying process must be adhered to and maintained.
1.3.4. Priming (first layer)
A. Zinc dust priming
The materials to be used are:
- Wörwag Woerophen – zinc dust paint product no. 106975
- Wörwag Woeropur – hardener, product no. 62916
- Alternative Wörwag Woeropur - hardener, product no. 107005
The volumetric mixing ratio of the zinc dust primer must be adhered to in accordance with
manufacturer specifications. For the hardener with product number 62916, the volumetric
mixing ratio according to manufacturer's specification is 4:1. When using the hardener with
product number 107005, the volumetric mixing ratio according to manufacturer's specification is
2.5:1.
The ratio must be set with a measuring scale.
After adding the hardener, the material is ready to be processed.
The layer thickness must be between 50 µm and 70 µm when dry. A primer coat must be
applied. On parts that are ordered primed, the first primer coat must be applied by the supplier.
The utilization of the primer takes place according to the order.
The surface must be free of paint defects
Any potentially arising runs, drips or flaws after priming must be corrected or reworked.
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B. Priming
The materials to be used are:
- Wörwag Woeropur – hardener, product no. 108786
- Wörwag Woeropur – HS – primer W-726, product no. 110717
The volumetric 8:1 mixing ratio of the primer must be followed in accordance with
manufacturer's specifications. The ratio must be set with a measuring scale.
After adding the hardener, the material is ready to be processed.
The layer thickness per primer coat must be between 50 µm and 70 µm when dry. A primer coat
must be applied. On parts that are ordered primed, the first primer coat must be applied by the
supplier. The primer is used according to the order.
The surface must be free of paint defects
Any potentially arising runs, drips or flaws after priming must be corrected or reworked.
1.3.4. Sealing of blank spots
After the first primer layer, all blank spots must be sealed with "Klebt und Dichtet" [glues and
seals] from Würth (Würth article number 089-0101). These spots concern in particular all
installed mounting brackets, such as for example C-tracks as well as steering pins on the top
side of the platform. This is to prevent water from penetrating into the cracks between the C-
track and beam and thereby promoting corrosion.
Important: Only acrylic or PU-based sealing material is to be used. Silicon-based sealing
material must not be used because silicon cannot be painted.
1.3.5. Priming (second layer)
The materials to be used are:
- Wörwag Woeropur – hardener, product no. 108786
- Wörwag Woeropur – HS – primer W-726. 110717
The volumetric 8:1 mixing ratio of the primer must be followed in accordance with
manufacturer's specifications. The ratio must be set with a measuring scale.
After adding the hardener, the material is ready to be processed.
The layer thickness per primer coat must be between 50 µm and 70 µm when dry. A primer coat
must be applied. On parts that are ordered primed, the first primer coat must be applied by the
supplier.
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1.3.6. Top coat
The materials to be used are:
- Wörwag Woeropur – hardener, product no. 108786
- Wörwag Woeropur – top coat W-755
- Wörwag Woeropur – thinner long, product no. 63222
The volumetric 4.5:1 mixing ratio of the final coat (Wörwag) must be followed in accordance with
manufacturer's specifications. The ratio must be set with a measuring scale.
After you add the hardener, the material is ready to be processed.
In the event of extremely warm temperatures (>25°C), up to 2% thinner can be used for
adjusting the top coat.
The layer thickness of the top coat must be between 40 µm and 60 µm when dry.
The surface must be free of paint defects
Any runs, drips or flaws in the top coat must be reworked.
1.3.7. Drying time and temperature
The drying time as well as drying temperature must be followed for all coating processes (zinc
dust priming, priming as well as top coating) in accordance with manufacturer's specifications.
This is the only way that the best possible corrosion protection can be ensured.
1.3.8. Test methods
A. Cross-cut test
The cross-cut test is used to determine the adhesion of one or several layers of paint to the
substrate.
Quick guide:
Use a cross-cutter to make six parallel cuts down to the substrate. Next, cross the cuts with six
corresponding cuts at a right angle. For this purpose, perform the cuts by holding the handle of
the cross-cut tester with one hand without applying additional pressure to the cutter head.
The cutting distance must be the same in each direction and, depending on the layer thickness
of the coating and type of substrate, as follows:
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Test as per DIN EN ISO 2409 Test as per ASTM D 33 59 - 02
Up to 60µm layer thickness: 1mm cutting interval up to 50µm layer thickness: 1mm cutting
interval
60–120µm layer thickness: 2mm cutting spacing 50–125µm: 2mm cutting interval
120–250µm layer thickness: 3mm cutting interval
After the cross-cut test is complete, use a soft brush to slightly brush along each diagonal of the
grid several times. The evaluation of the test is performed visually, with the naked eye by
comparison with table 1.
According to the number of chipped-off squares and the appearance, a parameter value – the
"cross-cut rating" – is assigned.
Table1:
Compliance with the mean value must be ensured.
B. Measuring layer thickness
The layer must be measured at several points using a thickness gauge. The total layer
thickness must be between 150 µm and 190 µm when dry.
Expected value
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1.4. Quality of assembly
In general, all screw connections must be tightened with a tested torque wrench.
1 Area of application
This section defines the tightening of screw connections with tightening torques when no other
tightening torques are specified on the design drawing. Certain characteristics must be
differentiated in this context.
Table 1 applies for:
- Standard threads according to DIN 13 T1
- Screws according to ISO 4014, ISO 4017, ISO 4762, (DIN 931, DIN 933, DIN 912)
- Contact areas dry
- Surface of the screw / nut blank or galvanized.
Table 2 applies for:
- Standard threads according to DIN 13 T1
- Screws according to ISO 4014, ISO 4017, ISO 4762, (DIN 931, DIN 933, DIN 912)
- Contact areas dry
- Surface of the screw / nut coated (Geomet 321 VL, Dacromet)
Table 3 applies for:
- Fine threads according to DIN 13 T2
- Screws according to ISO 8765, ISO 8676, ISO 21269, (DIN 960, DIN 961, DIN 1481)
- Contact areas dry
- Surface of the screw/nut blank or galvanized
Table 4 applies for:
- Standard threads according to DIN 13 T1
- Screw with countersunk head
- Contact areas dry
- Surface of the screw/nut blank or galvanized
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Table 5 applies for:
- Standard threads according to DIN 13 T1
- Screws according to ISO 4014, ISO 4017, ISO 4762, (DIN 931, DIN 933, DIN 912)
- Contact areas dry
- Material stainless steel
Table 6 applies for:
- Standard threads according to DIN 13 T1
- Screws according to ISO 4014, ISO 4017, ISO 4762 (DIN 931, DIN 933, DIN 912)
- Contact areas MoS2
- Surface of the screw/nut blank or galvanized
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2 Tightening torques
Table 1:
- Standard threads according to DIN 13 T1
- Screws according to ISO 4014, ISO 4017, ISO 4762, (DIN 931, DIN 933, DIN 912)
- Contact areas dry
- Surface of the screw/nut blank or galvanized
Thr
ead
fric
tion
µ =
0.14
Dimension
Strength class screw/nut
5.6
[Nm]
8.8/8
[Nm]
10.9/10
[Nm]
12.9/12
[Nm]
M4 1.4 3.3 4.8 5.6
M5 3 6.5 9.5 11.2
M6 5 11.3 16.5 19.3
M8 27.3 40.1 46.9
M10 54 79 93
M12 93 137 160
M14 148 218 255
M16 230 338 395
M18 329 469 549
M20 464 661 773
M22 634 904 1057
M24 798 1136 1329
M27 1176 1674 1959
M30 1597 2274 2662
M33 2161 3078 3601
M36 2778 3957 4631
M39 3600 5100 6000
M42 4050 5700 6850
M45 5100 7150 8550
M48 6100 8600 10300
M52 7900 11100 13300
M56 9800 13800 16500
M60 12200 17200 20600
M64 14800 20800 24900
M68 18000 25200 30300
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Thr
ead
fric
tion
µ =
0.12
Dimension
Strength class screw/nut
5.6
[Nm]
8.8/8
[Nm]
10.9/10
[Nm]
12.9/12
[Nm]
M4 1.2 3 4.6 5.1
M5 2.7 5.9 8.6 10
M6 4.7 10.1 14.9 17.4
M8 24.6 36.1 42.2
M10 48 71 83
M12 84 123 144
M14 133 195 229
M16 206 302 354
M18 295 421 492
M20 415 592 692
M22 567 807 945
M24 714 1017 1190
M27 1060 1496 1750
M30 1428 2033 2380
M33 1928 2747 3214
M36 2482 3535 4136
M39 3208 4569 5346
M42 3500 5000 5950
M45 4400 6220 7440
M48 5250 7400 8500
M52 6800 9550 11450
M56 8400 11800 14000
M60 10300 14600 17500
M64 12600 17700 21200
M68 15300 21500 2580
Quality Assurance Agreement – Transporter Industry International GmbH – Page 23 of 28
QMA 9.103 – Version 1.0 – Status: 10/01/2017 TII Group initials: ______ Supplier initials: ______
Table 2:
- Standard threads according to DIN 13 T1
- Screws according to ISO 4014, ISO 4017, ISO 4762, (DIN 931, DIN 933, DIN 912)
- Contact areas dry
- Surface of the screw/nut coated (Geomet 321 VL, D acromet)
Thr
ead
fric
tion
µ =
0.11
+/-
0.0
1
Dimension
Strength class screw/nut
8.8/8
[Nm]
10.9/10
[Nm]
12.9/12
[Nm]
M4 2.6 3.8 4.5
M5 5.2 7.6 8.8
M6 9 13 15
M8 21 32 38
M10 43 63 75
M12 75 108 128
M14 118 173 205
M16 182 270 315
M18 262 372 437
M20 370 525 615
M22 500 710 830
M24 635 900 1060
M27 930 1350 1570
M30 1270 1820 2120
M33 1700 2400 2900
M36 2200 3100 3700
M39 2850 4000 4800
M42 3500 4900 5900
M45 4400 6150 7350
M48 5250 7400 8900
M52 6800 9550 11450
M56 8400 11900 14200
M60 10500 14800 17700
M64 12700 17900 21500
M68 15500 21700 26000
Quality Assurance Agreement – Transporter Industry International GmbH – Page 24 of 28
QMA 9.103 – Version 1.0 – Status: 10/01/2017 TII Group initials: ______ Supplier initials: ______
Table 3:
- Fine threads according to DIN 13 T2
- Screws according to ISO 8765, ISO 8676, ISO 21269, (DIN 960, DIN 961, DIN 1481)
- Contact areas dry
- Surface of the screw/nut blank or galvanized
Thr
ead
fric
tion
µ =
0.14
Dimension
Strength class screw/nut
8.8/8
[Nm]
10.9/10
[Nm]
12.9/12
[Nm]
M8 x 1 27 40 47
M10 x 1.25 54 79 93
M12 x 1.25 96 140 165
M12 x 1.5 92 135 155
M14 x 1.5 150 220 260
M16 x 1.5 230 340 390
M18 x 1.5 350 490 580
M20 x 1.5 480 690 800
M22 x 1.5 640 920 1070
M24 x 2 810 1160 1350
M27 x 2 1190 1700 2000
M30 x 2 1610 2300 2700
Thr
ead
fric
tion
µ =
0.12
Dimension
Strength class screw/nut
8.8/8
[Nm]
10.9/10
[Nm]
12.9/12
[Nm]
M8 x 1 26 38 45
M10 x 1.25 51 75 87
M12 x 1.25 90 133 155
M12 x 1.5 87 128 150
M14 x 1.5 142 209 244
M16 x 1.5 218 320 374
M18 x 1.5 327 465 544
M20 x 1.5 454 646 756
M22 x 1.5 613 873 1022
M24 x 2 770 1095 1282
M27 x 2 1120 1594 1866
M30 x 2 1556 2216 2600
Quality Assurance Agreement – Transporter Industry International GmbH – Page 25 of 28
QMA 9.103 – Version 1.0 – Status: 10/01/2017 TII Group initials: ______ Supplier initials: ______
Table 4:
- Standard threads according to DIN 13 T1
- Screw with countersunk head
- Contact areas dry
- Surface of the screw/nut blank or galvanized
Thr
ead
fric
tion
µ =
0.14
Dimension
Strength class screw/nut
5.6
[Nm]
8.8/8
[Nm]
10.9/10
[Nm]
12.9/12
[Nm]
M4 1.1 2.6 3.8 4.5
M5 2.4 5.2 7.6 9
M6 4 9 13.2 15.4
M8 22 32 37.5
M10 43 63.2 74.4
M12 74.4 110 128
M14 118 174 204
M16 184 270 316
Thr
ead
fric
tion
µ =
0.12
Dimension
Strength class screw/nut
5.6
[Nm]
8.8/8
[Nm]
10.9/10
[Nm]
12.9/12
[Nm]
M4 1 2.4 3.7 4.1
M5 2.2 4.7 6.9 8
M6 3.8 8 12 14
M8 20 29 33.8
M10 38 57 67
M12 67 98 115
M14 106 156 183
M16 185 242 283
For screws with a countersunk head, the required tightening torque is calculated based on 80%
of the corresponding screw with hexagon head (in this case 80% of the values from Table 1).
Quality Assurance Agreement – Transporter Industry International GmbH – Page 26 of 28
QMA 9.103 – Version 1.0 – Status: 10/01/2017 TII Group initials: ______ Supplier initials: ______
Table 5:
- Standard threads according to DIN 13 T1
- Screws according to ISO 4014, ISO 4017, ISO 4762, (DIN 931, DIN 933, DIN 912)
- Contact areas dry
- Material stainless steel
Dimension
A2/A4 strength class 70
µ = 0.12
[Nm]
µ = 0.14
[Nm]
M5 3.7 4.2
M6 6.4 7.3
M8 15.3 17.5
M10 31 35
M12 52 60
M14 83 94
M16 126 144
M18 174 200
M20 245 280
M24 235 270
M27 342 392
M30 467 536
For dry contact areas, use the indicated tightening torques under µ = 0.14.
Quality Assurance Agreement – Transporter Industry International GmbH – Page 27 of 28
QMA 9.103 – Version 1.0 – Status: 10/01/2017 TII Group initials: ______ Supplier initials: ______
Table 6:
- Standard threads according to DIN 13 T1
- Screws according to ISO 4014, ISO 4017, ISO 4762 (DIN 931, DIN 933, DIN 912)
- Contact areas MoS2
- Surface of the screw/nut blank or galvanized
Thr
ead
fric
tion
µ =
0.08
Dimension
Strength class screw/nut
8.8/8
[Nm]
10.9/10
[Nm]
12.9/12
[Nm]
M4 2.1 3.1 3.6
M5 4.2 6.1 7.2
M6 7.3 11 12
M8 17 25 30
M10 34 51 59
M12 59 87 100
M14 95 140 165
M16 145 215 250
M18 210 300 350
M20 300 420 490
M22 400 560 660
M24 510 720 840
M27 740 1050 1250
M30 1000 1450 1700
Quality Assurance Agreement – Transporter Industry International GmbH – Page 28 of 28
QMA 9.103 – Version 1.0 – Status: 10/01/2017 TII Group initials: ______ Supplier initials: ______
1.4.1. Screw connections and use of screw-locking e lements
For load-bearing screw connections , the following is defined:
• Since load-bearing screw connections must always be tightened to the required torque, these
torques are always indicated in the drawings.
• Load-bearing screw connections must also always be implemented with appropriate safeguards
against loosening.
• If the expansion length of the screw connection ≤ 3 x nominal diameter, screw-locking elements
by Nordlock are to be used.
• If the expansion length of the screw connection > 3 x nominal diameter, no screw-locking
elements by Nordlock are used.
• Existing designs or lists of items are maintained or modified in regard to inclusion of Nordlock
screw-securing elements only in exceptional cases.
• For particularly safety-relevant screw connections, the screws can also be glued.
• If the screws are glued, then this must be indicated on the drawing with the name and type of
glue used to secure the screw.
For non-load-bearing screws (e.g. for lighting holders, panels, etc.), the following is established:
• No Nordlock screw-securing elements are used.
• For screw connections in through-holes, DIN 125 washers and self-locking nuts are to be
provided.
• For screw connections for which no self-locking nuts may be used (e.g. blind holes), detent-
edged washers form M are to be used as the screw-locking elements.