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EN 10277‑4 Grade 20NiCrMoS2‑2: Ferritic‑Pearlite Steel with Optimized Hardness and Cold‑Drawn Performance (+FP+C)

Steel 20NiCrMoS-2 is suitable for parts in vehicle and machine engineering, that are wear loaded at mean core strength, high ductility and fatigue resistance (e.g. gear wheels, shafts, axles). The show an enhanced workability. Lowest application temperature -60°C, most favorable application area up to 60 mm nominal size. 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

7.84 - 7.85 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

205 - 212.78 GPa

100.0 °C

207 GPa

200.0 °C

188 - 199 GPa

300.0 °C

192 GPa

400.0 °C

184 GPa

500.0 °C

175 GPa

600.0 °C

164 GPa

Hardness, Brinell

20.0 °C

149 - 240 [-]

Poisson's ratio

20.0 °C

0.29 [-]

Shear modulus

20.0 °C

79 - 82.8 GPa

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

1.1E-5 - 1.21E-5 1/K

200.0 °C

1.27E-5 1/K

300.0 °C

1.32E-5 1/K

400.0 °C

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

-60 - 0 °C

Melting point

1382 - 1529 °C

Typical for Nickel 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

44 - 46.3 W/(m·K)

100.0 °C

47.1 W/(m·K)

200.0 °C

46.2 W/(m·K)

300.0 °C

44.1 W/(m·K)

400.0 °C

41.3 W/(m·K)

500.0 °C

38.6 W/(m·K)

600.0 °C

35.9 W/(m·K)

Thermal diffusivity

20.0 °C

12.8 mm²/s

100.0 °C

12.1 mm²/s

200.0 °C

11.1 mm²/s

300.0 °C

10 mm²/s

400.0 °C

8.8 mm²/s

500.0 °C

7.4 mm²/s

600.0 °C

4.7 mm²/s

Electrical

PropertyTemperatureValue

Electrical resistivity

20.0 °C

1.6E-7 - 2.25E-7 Ω·m

100.0 °C

2.72E-7 Ω·m

200.0 °C

3.42E-7 Ω·m

300.0 °C

4.26E-7 Ω·m

400.0 °C

5.26E-7 Ω·m

500.0 °C

6.4E-7 Ω·m

600.0 °C

7.73E-7 Ω·m

Chemical properties

PropertyValue

Carbon

0.17 - 0.23 %

Chromium

0.35 - 0.7 %

Manganese

0.65 - 0.95 %

Molybdenum

0.15 - 0.25 %

Nickel

0.4 - 0.7 %

Phosphorus

0.03 - 0.04 %

Silicon

0.4 %

Sulfur

0.02 - 0.04 %


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