DIN 17210 Grade 21NiCrMoS2 Soft Annealed Steel (+A) – High Performance for Wear-Resistant Applications
The steel 21 NiCrMoS 2 is used for wear loaded parts in the vehicle and mechanical engineering with medium core strength, better machinability, high toughness and high fatigue strength (e.g. gears, shafts, axles). The lowest application amounts to -60 degrees C, the best application up to 60 mm nominal size.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 20.0 °C | 7.84 - 7.85 g/cm³ |
Mechanical
| Property | Temperature | Value |
|---|---|---|
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 | |
Poisson's ratio | 20.0 °C | 0.29 [-] |
Shear modulus | 20.0 °C | 79 - 82.8 GPa |
Thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
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
| Property | Temperature | Value |
|---|---|---|
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
| Property | Value |
|---|---|
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 | 0.02 - 0.035 % |
Metal
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