EN 10263-4 Grade 34CrMo4 cold drawn, annealed to achieve spheroidized carbides and slightly skin passed

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Description

The cold-upsettable steel 34 CrMo 4 can be cold-formed with a medium to high rate of forming according to the usual forming methods on single-stage and multi-stage presses. It is used for hexagon screws and hexagon socket head cap screw of strength class 8.8 in the thick dimension range, of strength class 10.9 in the medium and of strength class 12.9 in the thin dimension range it is used for high-strength parts manufactured according to drawings.

Related Standards

Equivalent Materials

This material data has been provided by WIAM.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.81 g/cm³

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Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

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20.0 °C

210.27 - 212 GPa

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100.0 °C

205.17 - 207 GPa

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200.0 °C

198.68 - 199 GPa

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300.0 °C

191.11 - 192 GPa

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400.0 °C

182.31 - 184 GPa

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500.0 °C

171.64 - 175 GPa

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600.0 °C

164 GPa

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Poisson's ratio

20.0 °C

0.28 [-]

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100.0 °C

0.29 [-]

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200.0 °C

0.3 [-]

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300.0 °C

0.3 [-]

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400.0 °C

0.3 [-]

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500.0 °C

0.31 [-]

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Reduction of area

20.0 °C

61 %

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Shear modulus

20.0 °C

81.88 GPa

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100.0 °C

79.57 GPa

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200.0 °C

76.63 GPa

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300.0 °C

73.54 GPa

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400.0 °C

69.99 GPa

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500.0 °C

65.66 GPa

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Tensile strength

20.0 °C

590 - 610 MPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.05E-5 1/K

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20.0 °C

1.15E-5 1/K

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100.0 °C

1.21E-5 1/K

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200.0 °C

1.27E-5 1/K

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300.0 °C

1.32E-5 1/K

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400.0 °C

1.36E-5 1/K

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500.0 °C

1.4E-5 1/K

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600.0 °C

1.44E-5 1/K

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Melting point

1382 - 1529 °C

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Typical for Chromium Molybdenum Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

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20.0 °C

461 J/(kg·K)

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100.0 °C

479 J/(kg·K)

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200.0 °C

499 J/(kg·K)

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300.0 °C

517 J/(kg·K)

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400.0 °C

536 J/(kg·K)

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500.0 °C

558 J/(kg·K)

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600.0 °C

587 J/(kg·K)

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Thermal conductivity

20.0 °C

39.6 W/(m·K)

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100.0 °C

41.6 W/(m·K)

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200.0 °C

41.8 W/(m·K)

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300.0 °C

40.3 W/(m·K)

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400.0 °C

38.2 W/(m·K)

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500.0 °C

36 W/(m·K)

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600.0 °C

33.6 W/(m·K)

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Thermal diffusivity

20.0 °C

11 mm²/s

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100.0 °C

10.8 mm²/s

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200.0 °C

10.1 mm²/s

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300.0 °C

9.2 mm²/s

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400.0 °C

8.1 mm²/s

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500.0 °C

7 mm²/s

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600.0 °C

5.7 mm²/s

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Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

2.63E-7 Ω·m

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100.0 °C

3.08E-7 Ω·m

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200.0 °C

3.78E-7 Ω·m

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300.0 °C

4.66E-7 Ω·m

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400.0 °C

5.69E-7 Ω·m

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500.0 °C

6.87E-7 Ω·m

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600.0 °C

8.26E-7 Ω·m

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Chemical properties

PropertyValue

Carbon

0.3 - 0.37 %

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Chromium

0.9 - 1.2 %

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Manganese

0.6 - 0.9 %

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Molybdenum

0.15 - 0.3 %

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Phosphorus

0.04 %

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Silicon

0.4 %

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Sulfur

0.035 %

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