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EN 10083-1 Grade 34CrMo4 Quenched & Tempered Steel: High Strength & Toughness for Automotive & Industrial Applications

Steel 34CrMo4 is suitable for parts with high strength and toughness requirements at mean and higher heat-treatment sections (also large forged parts) in vehicle manufacturing, engine and machine engineering (e.g. shafts, gear wheels, steering knuckles). The steel shows high resistivity to static and dynamic loading. Lowest working temperature -20 °C.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.81 - 7.85 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

210 - 212 GPa

100.0 °C

205 - 207 GPa

200.0 °C

195 - 199 GPa

300.0 °C

185 - 192 GPa

400.0 °C

182.31 - 184 GPa

500.0 °C

171.64 - 175 GPa

600.0 °C

164 GPa

Elongation

20.0 °C

11 - 15 %

Poisson's ratio

20.0 °C

0.28 [-]

100.0 °C

0.29 [-]

200.0 °C

0.3 [-]

300.0 °C

0.3 [-]

400.0 °C

0.3 [-]

500.0 °C

0.31 [-]

Reduction of area

20.0 °C

45 - 60 %

Shear modulus

20.0 °C

81 - 81.88 GPa

100.0 °C

79.57 GPa

200.0 °C

76.63 GPa

300.0 °C

73.54 GPa

400.0 °C

69.99 GPa

500.0 °C

65.66 GPa

Tensile strength

20.0 °C

700 - 1200 MPa

Yield strength

20.0 °C

450 - 800 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

1.4E-5 1/K

600.0 °C

1.44E-5 1/K

Max service temperature, long

-20 - 0 °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

39.6 - 42 W/(m·K)

100.0 °C

41.6 W/(m·K)

200.0 °C

41.8 W/(m·K)

300.0 °C

40.3 W/(m·K)

400.0 °C

38.2 W/(m·K)

500.0 °C

36 W/(m·K)

600.0 °C

33.6 W/(m·K)

Thermal diffusivity

20.0 °C

11 mm²/s

100.0 °C

10.8 mm²/s

200.0 °C

10.1 mm²/s

300.0 °C

9.2 mm²/s

400.0 °C

8.1 mm²/s

500.0 °C

7 mm²/s

600.0 °C

5.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.8E-7 - 2.63E-7 Ω·m

100.0 °C

3.08E-7 Ω·m

200.0 °C

3.78E-7 Ω·m

300.0 °C

4.66E-7 Ω·m

400.0 °C

5.69E-7 Ω·m

500.0 °C

6.87E-7 Ω·m

600.0 °C

8.26E-7 Ω·m

Chemical properties

PropertyValue

Carbon

0.3 - 0.37 %

Chromium

0.9 - 1.2 %

Copper

0.4 %

Manganese

0.6 - 0.9 %

Molybdenum

0.15 - 0.3 %

Phosphorus

0.03 - 0.04 %

Silicon

0.1 - 0.4 %

Sulfur

0.035 %


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