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EN 10263-4 Grade 34CrNiMo6 – Annealed for Spheroidized Carbides, Ideal for High‑Strength Screws & Stress‑Critical Extrusions

The cold-upsettable steel 34 CrNiMo 6 can be cold-formed with the suitable tools with a low to medium rate of forming according to the usual forming methods on single-stage and multi-stage presses. It is used for high-strength screws of strength classes 10.9 and 12.9 in the thick dimension range and for extruded parts with special stress.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.8 g/cm³

Mechanical

PropertyTemperatureValueComment

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

212 GPa

100.0 °C

207 GPa

200.0 °C

199 GPa

300.0 °C

192 GPa

400.0 °C

184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Poisson's ratio

23.0 °C

0.29 [-]

Typical for Nickel Chromium Molybdenum Steel

Reduction of area

20.0 °C

58 %

Tensile strength

20.0 °C

680 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.05E-5 1/K

20.0 °C

1.15E-5 1/K

100.0 °C

1.21E-5 1/K

200.0 °C

1.27E-5 1/K

300.0 °C

1.32E-5 1/K

400.0 °C

1.36E-5 1/K

500.0 °C

1.4E-5 1/K

600.0 °C

1.44E-5 1/K

Melting point

1382 - 1529 °C

Typical for Nickel Chromium Molybdenum Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

461 J/(kg·K)

100.0 °C

479 J/(kg·K)

200.0 °C

499 J/(kg·K)

300.0 °C

517 J/(kg·K)

400.0 °C

536 J/(kg·K)

500.0 °C

558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Thermal conductivity

20.0 °C

33.7 W/(m·K)

100.0 °C

36.2 W/(m·K)

200.0 °C

37.8 W/(m·K)

300.0 °C

37.2 W/(m·K)

400.0 °C

35.7 W/(m·K)

500.0 °C

34 W/(m·K)

600.0 °C

32 W/(m·K)

Thermal diffusivity

20.0 °C

9.4 mm²/s

100.0 °C

9.4 mm²/s

200.0 °C

9.2 mm²/s

300.0 °C

8.5 mm²/s

400.0 °C

7.6 mm²/s

500.0 °C

6.6 mm²/s

600.0 °C

5.4 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

3.09E-7 Ω·m

100.0 °C

3.54E-7 Ω·m

200.0 °C

4.18E-7 Ω·m

300.0 °C

5.05E-7 Ω·m

400.0 °C

6.09E-7 Ω·m

500.0 °C

7.27E-7 Ω·m

600.0 °C

8.67E-7 Ω·m

Chemical properties

PropertyValue

Carbon

0.3 - 0.38 %

Chromium

1.4 - 1.7 %

Manganese

0.4 - 0.7 %

Molybdenum

0.15 - 0.3 %

Nickel

1.4 - 1.7 %

Phosphorus

0.04 %

Silicon

0.4 %

Sulfur

0.035 %


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