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EN 10277-5 Grade C50E: Cold‑Drawn, Quenched & Tempered Steel for Heavy Engineering Applications

Steel C50E is suitable for larger parts (heavy forged parts) in vehicle, engine and machine engineering (e.g. transmission parts, shafts, wheel hubs). Lowest application temperature -25°C. As a bright steel product it is used in the form of bars, bright, straight, in various conditions (see DIN EN 10277 : 1999-10).

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.8 - 7.85 g/cm³

Mechanical

PropertyTemperatureValueComment

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

175 - 184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Elongation

20.0 °C

15 - 16 %

Poisson's ratio

23.0 °C

0.29 [-]

Typical for Medium Carbon Steel

Shear modulus

20.0 °C

81 GPa

Tensile strength

20.0 °C

650 - 850 MPa

Yield strength Rp0.2

20.0 °C

400 - 460 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

1.11E-5 - 1.25E-5 1/K

200.0 °C

1.21E-5 - 1.3E-5 1/K

300.0 °C

1.29E-5 - 1.36E-5 1/K

400.0 °C

1.35E-5 - 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

Max service temperature, long

-25 - 0 °C

Melting point

1380 - 1514 °C

Typical for Medium Carbon 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

41.7 - 52 W/(m·K)

100.0 °C

43.4 - 50.6 W/(m·K)

200.0 °C

43.2 - 48.1 W/(m·K)

300.0 °C

41.4 - 45.7 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

1.2E-7 - 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

0.47 - 0.55 %

Chromium

0.4 %

Manganese

0.6 - 0.9 %

Molybdenum

0.1 %

Nickel

0.4 %

Phosphorus

0.03 - 0.04 %

Silicon

0.4 %

Sulfur

0.035 %


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