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EN 10083‑2 Grade C25 – Quenched & Tempered Steel for High‑Strength, Low‑Strain Applications

Steel C25 is suitable for low strained parts of small heat-treatment sections in vehicle manufacturing and machine engineering (e.g. gear wheels, piston rods). Lowest working temperature -25 °C.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.83 - 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

19 - 21 %

Poisson's ratio

23.0 °C

0.29 [-]

Typical for Low Carbon Steel

Reduction of area

20.0 °C

45 - 50 %

Shear modulus

20.0 °C

81 GPa

Tensile strength

20.0 °C

500 - 700 MPa

Yield strength

20.0 °C

320 - 370 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

1480 - 1526 °C

Typical for Low Carbon Steel

Specific heat capacity

-100.0 °C

423 J/(kg·K)

20.0 °C

460 - 461 J/(kg·K)

100.0 °C

479 - 480 J/(kg·K)

200.0 °C

499 - 520 J/(kg·K)

300.0 °C

517 J/(kg·K)

400.0 °C

536 - 610 J/(kg·K)

500.0 °C

558 J/(kg·K)

600.0 °C

587 J/(kg·K)

Thermal conductivity

-100.0 °C

37.6 W/(m·K)

20.0 °C

42.2 - 52 W/(m·K)

100.0 °C

43.2 - 51 W/(m·K)

200.0 °C

42.9 - 49 W/(m·K)

300.0 °C

41.2 - 46 W/(m·K)

400.0 °C

39.1 W/(m·K)

500.0 °C

36.6 W/(m·K)

600.0 °C

34.1 W/(m·K)

Thermal diffusivity

-100.0 °C

12.9 mm²/s

20.0 °C

11.7 mm²/s

100.0 °C

11.2 mm²/s

200.0 °C

10.3 mm²/s

300.0 °C

9.4 mm²/s

400.0 °C

8.3 mm²/s

500.0 °C

7.1 mm²/s

600.0 °C

5.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

-100.0 °C

1.82E-7 Ω·m

20.0 °C

1.2E-7 - 2.47E-7 Ω·m

100.0 °C

2.96E-7 Ω·m

200.0 °C

3.68E-7 Ω·m

300.0 °C

4.55E-7 Ω·m

400.0 °C

5.56E-7 Ω·m

500.0 °C

6.75E-7 Ω·m

600.0 °C

8.13E-7 Ω·m

Magnetic

PropertyValueComment

Curie temperature

770 °C

Typical for Low Carbon Steel

Chemical properties

PropertyValue

Carbon

0.22 - 0.29 %

Chromium

0.4 %

Copper

0.3 %

Manganese

0.4 - 0.7 %

Molybdenum

0.1 %

Nickel

0.4 %

Phosphorus

0.05 %

Silicon

0.1 - 0.4 %

Sulfur

0.045 %


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