DIN 17210 Grade 21NiCrMoS2 soft annealed (+A)
DIN 17210 Grade 21NiCrMoS2 soft annealed (+A) introduction
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.
Equivalent material: ISO 20NiCrMoS2, DIN 20NiCrMoS2-2, DIN 1.6526, AFNOR 20NiCrMoS2-2, BS 20NiCrMoS2-2, UNI 20NiCrMoS2-2, AISI 8620H, AISI 8720, SAE 8620H, SAE 8720, EN 21NiCrMoS2, EN 20NiCrMoS2-2, EN 1.6526, ISO 20NiCrMoS2-2, ASTM 8720, UNS H86200, UNS G87200
DIN 17210 Grade 21NiCrMoS2 soft annealed (+A) general
Property |
Temperature |
Value |
Density |
20.0 °C |
Density of 7.84 - 7.85 g/cm³ |
DIN 17210 Grade 21NiCrMoS2 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 21NiCrMoS2 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 0.02 - 0.035 % |
DIN 17210 Grade 21NiCrMoS2 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 21NiCrMoS2 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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