DIN 17210 Grade 21NiCrMo2 soft annealed (+A)
DIN 17210 Grade 21NiCrMo2 soft annealed (+A) introduction
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 degrees C, the best application up to 60 mm nominal size.
Equivalent material: GB 20CrNiMo, GB 20CrNiMoH, AFNOR 20NCD2, BS 805M20, ISO 20NiCrMo2, UNI 20NiCrMo2, JIS SNCM220H, JIS SNCM220, PN 20HNM, UNE F.1522-20NiCrMo2, DIN 20NiCrMo2-2, DIN 1.6523, AFNOR 20NiCrMo2-2, BS 21NiCrMo2-2, UNI 20NiCrMo2-2, SS 2506, UNE 20NiCrMo2, AISI 8620, AISI 8617H, AISI 8620H, AISI 8617, SAE 8620, SAE 8617H, SAE 8620H, SAE 8617, JIS SNCM220WCH, JIS SNCM220RCH, JIS 20NiCrMo2, EN 21NiCrMo2, EN 20NiCrMo2-2, EN 1.6523, ISO 20NiCrMo2-2, GOST 20ChGNM, ASTM 8620H, ASTM 8617H, ASTM 8620, UNS G86200, UNS H86170, UNS H86200, UNS G86170
DIN 17210 Grade 21NiCrMo2 soft annealed (+A) general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.84 - 7.85 g/cm³ |
DIN 17210 Grade 21NiCrMo2 soft annealed (+A) thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
-100.0 °C |
Coefficient of thermal expansion of 1.05E-5 1/K |
- |
| - |
20.0 °C |
Coefficient of thermal expansion of 1.15E-5 1/K |
- |
| - |
100.0 °C |
Coefficient of thermal expansion of 1.1E-5 - 1.21E-5 1/K |
- |
| - |
200.0 °C |
Coefficient of thermal expansion of 1.27E-5 1/K |
- |
| - |
300.0 °C |
Coefficient of thermal expansion of 1.32E-5 1/K |
- |
| - |
400.0 °C |
Coefficient of thermal expansion of 1.36E-5 1/K |
- |
| - |
500.0 °C |
Coefficient of thermal expansion of 1.4E-5 1/K |
- |
| - |
600.0 °C |
Coefficient of thermal expansion of 1.44E-5 1/K |
- |
| Max service temperature, long |
- |
Max service temperature, long of -60 - 0 °C |
- |
| Melting point |
- |
Melting point of 1382 - 1529 °C |
Typical for Nickel Chromium Molybdenum Steel |
| Specific heat capacity |
-100.0 °C |
Specific heat capacity of 423 J/(kg·K) |
- |
| - |
20.0 °C |
Specific heat capacity of 460 - 461 J/(kg·K) |
- |
| - |
100.0 °C |
Specific heat capacity of 479 J/(kg·K) |
- |
| - |
200.0 °C |
Specific heat capacity of 499 J/(kg·K) |
- |
| - |
300.0 °C |
Specific heat capacity of 517 J/(kg·K) |
- |
| - |
400.0 °C |
Specific heat capacity of 536 J/(kg·K) |
- |
| - |
500.0 °C |
Specific heat capacity of 558 J/(kg·K) |
- |
| - |
600.0 °C |
Specific heat capacity of 587 J/(kg·K) |
- |
| Thermal conductivity |
20.0 °C |
Thermal conductivity of 44 - 46.3 W/(m·K) |
- |
| - |
100.0 °C |
Thermal conductivity of 47.1 W/(m·K) |
- |
| - |
200.0 °C |
Thermal conductivity of 46.2 W/(m·K) |
- |
| - |
300.0 °C |
Thermal conductivity of 44.1 W/(m·K) |
- |
| - |
400.0 °C |
Thermal conductivity of 41.3 W/(m·K) |
- |
| - |
500.0 °C |
Thermal conductivity of 38.6 W/(m·K) |
- |
| - |
600.0 °C |
Thermal conductivity of 35.9 W/(m·K) |
- |
| Thermal diffusivity |
20.0 °C |
Thermal diffusivity of 12.8 mm²/s |
- |
| - |
100.0 °C |
Thermal diffusivity of 12.1 mm²/s |
- |
| - |
200.0 °C |
Thermal diffusivity of 11.1 mm²/s |
- |
| - |
300.0 °C |
Thermal diffusivity of 10 mm²/s |
- |
| - |
400.0 °C |
Thermal diffusivity of 8.8 mm²/s |
- |
| - |
500.0 °C |
Thermal diffusivity of 7.4 mm²/s |
- |
| - |
600.0 °C |
Thermal diffusivity of 4.7 mm²/s |
- |
DIN 17210 Grade 21NiCrMo2 soft annealed (+A) chemical
| Property |
Value |
| Carbon |
Carbon of 0.17 - 0.23 % |
| Chromium |
Chromium of 0.4 - 0.7 % |
| Manganese |
Manganese of 0.65 - 0.95 % |
| Molybdenum |
Molybdenum of 0.15 - 0.25 % |
| Nickel |
Nickel of 0.4 - 0.7 % |
| Phosphorus |
Phosphorus of 0.04 % |
| Silicon |
Silicon of 0.4 % |
| Sulfur |
Sulfur of 0.035 % |
DIN 17210 Grade 21NiCrMo2 soft annealed (+A) electrical
| Property |
Temperature |
Value |
| Electrical resistivity |
20.0 °C |
Electrical resistivity of 1.6E-7 - 2.25E-7 Ω·m |
| - |
100.0 °C |
Electrical resistivity of 2.72E-7 Ω·m |
| - |
200.0 °C |
Electrical resistivity of 3.42E-7 Ω·m |
| - |
300.0 °C |
Electrical resistivity of 4.26E-7 Ω·m |
| - |
400.0 °C |
Electrical resistivity of 5.26E-7 Ω·m |
| - |
500.0 °C |
Electrical resistivity of 6.4E-7 Ω·m |
| - |
600.0 °C |
Electrical resistivity of 7.73E-7 Ω·m |
DIN 17210 Grade 21NiCrMo2 soft annealed (+A) mechanical
| Property |
Temperature |
Value |
| Elastic modulus |
-100.0 °C |
Elastic modulus of 217 GPa |
| - |
20.0 °C |
Elastic modulus of 205 - 212.78 GPa |
| - |
100.0 °C |
Elastic modulus of 207 GPa |
| - |
200.0 °C |
Elastic modulus of 188 - 199 GPa |
| - |
300.0 °C |
Elastic modulus of 192 GPa |
| - |
400.0 °C |
Elastic modulus of 184 GPa |
| - |
500.0 °C |
Elastic modulus of 175 GPa |
| - |
600.0 °C |
Elastic modulus of 164 GPa |
| Poisson's ratio |
20.0 °C |
Poisson's ratio of 0.29 [-] |
| Shear modulus |
20.0 °C |
Shear modulus of 79 - 82.8 GPa |
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