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DIN 1652-3 Grade 21NiCrMo2: High-Performance Cold-Drawn Ferrite-Pearlite Steel for Wear-Resistant Applications

The steel 21 NiCrMo 2 respectively 23 NiCrMo 2 is used for wear loaded parts in the vehicle and mechanical engineering with medium core strength, high toughness and high fatigue strength (e.g. gears, shafts, axles). The lowest application amounts to -60 °C, the best application up to 60 mm nominal size.

Properties

General

PropertyTemperatureValue

Density

20.0 °C

7.84 g/cm³

Mechanical

PropertyTemperatureValue

Elastic modulus

-100.0 °C

217 GPa

20.0 °C

212 - 212.78 GPa

100.0 °C

207 GPa

200.0 °C

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

145 - 192 [-]

Poisson's ratio

20.0 °C

0.29 [-]

Shear modulus

20.0 °C

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

1.21E-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

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

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

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

0.4 - 0.7 %

Manganese

0.65 - 0.95 %

Molybdenum

0.15 - 0.25 %

Nickel

0.4 - 0.7 %

Phosphorus

0.04 %

Silicon

0.4 %

Sulfur

0.035 %


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