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EN 10269 40CrMoV4-6 Quenched & Tempered Steel – High‑Temperature Performance up to 540 °C

High-temperature steel for screws and nuts. Max. application temperature: 540 °C Further application for mounting elements at increased temperatures.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.83 - 7.85 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

211 - 212 GPa

100.0 °C

204 - 207 GPa

200.0 °C

196 - 199 GPa

300.0 °C

186 - 192 GPa

400.0 °C

177 - 184 GPa

500.0 °C

164 - 175 GPa

600.0 °C

127 - 164 GPa

Elongation

20.0 °C

14 %

Poisson's ratio

20.0 °C

0.28 [-]

Reduction of area

20.0 °C

45 %

Tensile strength

20.0 °C

850 - 1000 MPa

Yield strength Rp0.2

20.0 °C

640 - 700 MPa

50.0 °C

631 - 687 MPa

100.0 °C

612 - 670 MPa

150.0 °C

591 - 647 MPa

200.0 °C

577 - 631 MPa

250.0 °C

556 - 608 MPa

300.0 °C

542 - 593 MPa

350.0 °C

528 - 577 MPa

400.0 °C

507 - 554 MPa

450.0 °C

479 - 523 MPa

500.0 °C

429 - 470 MPa

550.0 °C

366 - 400 MPa

600.0 °C

268 - 293 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

1.11E-5 - 1.21E-5 1/K

200.0 °C

1.21E-5 - 1.27E-5 1/K

300.0 °C

1.29E-5 - 1.32E-5 1/K

400.0 °C

1.35E-5 - 1.36E-5 1/K

500.0 °C

1.39E-5 - 1.4E-5 1/K

600.0 °C

1.41E-5 - 1.44E-5 1/K

Max service temperature, long

0 - 540 °C

Melting point

1382 - 1529 °C

Typical for Chromium Molybdenum Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

460 - 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 - 45.1 W/(m·K)

100.0 °C

45.1 W/(m·K)

200.0 °C

44.1 W/(m·K)

300.0 °C

41.9 W/(m·K)

400.0 °C

39.4 W/(m·K)

500.0 °C

36.9 W/(m·K)

600.0 °C

34.4 W/(m·K)

Thermal diffusivity

20.0 °C

12.5 mm²/s

100.0 °C

11.6 mm²/s

200.0 °C

10.6 mm²/s

300.0 °C

9.5 mm²/s

400.0 °C

8.4 mm²/s

500.0 °C

7.1 mm²/s

600.0 °C

5.8 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

2.31E-7 Ω·m

100.0 °C

2.84E-7 Ω·m

200.0 °C

3.58E-7 Ω·m

300.0 °C

4.48E-7 Ω·m

400.0 °C

5.52E-7 Ω·m

500.0 °C

6.71E-7 Ω·m

600.0 °C

8.06E-7 Ω·m

Chemical properties

PropertyValue

Aluminium

0.015 %

Carbon

0.36 - 0.44 %

Chromium

0.9 - 1.2 %

Manganese

0.45 - 0.85 %

Molybdenum

0.5 - 0.65 %

Phosphorus

0.03 %

Silicon

0.4 %

Sulfur

0.03 %

Vanadium

0.25 - 0.35 %


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