EN 10277‑4 Grade 20NiCrMoS₂‑2 – Soft Annealed & Cold Drawn Steel (+A+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
| 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 | |
Hardness, Brinell | 20.0 °C | 255 - 270 [-] |
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 | 0.35 - 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 % |
Metal
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