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EN 10250-2 C45 Steel – Normalized & Tempered Grade for Automotive & Machinery Applications

Steel C45 is suitable for mean loaded parts in vehicle, engine and machine engineering (e.g. transmission shafts, gear wheels, clutch parts).

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.8 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

210.11 - 212 GPa

100.0 °C

205.02 - 207 GPa

200.0 °C

198.84 - 199 GPa

300.0 °C

191.42 - 192 GPa

400.0 °C

183.23 - 184 GPa

500.0 °C

173.19 - 175 GPa

600.0 °C

164 GPa

Elongation

20.0 °C

15 - 16 %

Elongation, transverse

20.0 °C

11 - 12 %

Hardness, Brinell

20.0 °C

207 [-]

Poisson's ratio

20.0 °C

0.28 [-]

100.0 °C

0.28 [-]

200.0 °C

0.29 [-]

300.0 °C

0.29 [-]

400.0 °C

0.3 [-]

500.0 °C

0.3 [-]

Shear modulus

20.0 °C

82.04 GPa

100.0 °C

80.03 GPa

200.0 °C

77.09 GPa

300.0 °C

74.16 GPa

400.0 °C

70.76 GPa

500.0 °C

66.74 GPa

Tensile strength

20.0 °C

530 - 580 MPa

Tensile strength, transverse

20.0 °C

530 - 560 MPa

Yield strength

20.0 °C

230 - 305 MPa

Yield strength, transverse

20.0 °C

230 - 275 MPa

Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

-100.0 °C

1.08E-5 1/K

20.0 °C

1.19E-5 1/K

100.0 °C

1.25E-5 1/K

200.0 °C

1.3E-5 1/K

300.0 °C

1.36E-5 1/K

400.0 °C

1.41E-5 1/K

500.0 °C

1.45E-5 1/K

600.0 °C

1.49E-5 1/K

Max service temperature

500 °C

Typical for Carbon Steel

Melting point

1380 - 1514 °C

Typical for Medium Carbon 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

41.7 W/(m·K)

100.0 °C

43.4 W/(m·K)

200.0 °C

43.2 W/(m·K)

300.0 °C

41.4 W/(m·K)

400.0 °C

39.1 W/(m·K)

500.0 °C

36.7 W/(m·K)

600.0 °C

34.1 W/(m·K)

Thermal diffusivity

20.0 °C

11.6 mm²/s

100.0 °C

11.3 mm²/s

200.0 °C

10.5 mm²/s

300.0 °C

9.5 mm²/s

400.0 °C

8.3 mm²/s

500.0 °C

7.1 mm²/s

600.0 °C

5.8 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

2.5E-7 Ω·m

100.0 °C

2.95E-7 Ω·m

200.0 °C

3.65E-7 Ω·m

300.0 °C

4.53E-7 Ω·m

400.0 °C

5.56E-7 Ω·m

500.0 °C

6.74E-7 Ω·m

600.0 °C

8.13E-7 Ω·m

Chemical properties

PropertyValue

Carbon

0.42 - 0.5 %

Chromium

0.4 %

Manganese

0.5 - 0.8 %

Molybdenum

0.1 %

Nickel

0.4 %

Phosphorus

0.05 %

Silicon

0.4 %

Sulfur

0.045 %


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