GB/T 3077 Grade 20CrMo Annealed
Equivalent material: AISI 4120, SAE 4120, 1.7218, DIN 25CrMo4, JIS SCM420, AFNOR 18CD4, BS 708M20, ISO 18CrMo4, DIN 1.7321, DIN 20MoCr4, AFNOR 20MoCr4, BS 20MoCr4, AISI 4118H, AISI 4118, SAE 4118H, SAE 4118, EN 20MoCr4, EN 1.7321, GB/T B10200, GB/T G20CrMo, ASTM 4118H, ASTM 4118, UNS H41180, UNS G41180
GB/T 3077 Grade 20CrMo Annealed general
| Property |
Temperature |
Value |
Comment |
| Density |
23.0 °C |
Density of 7.8 - 7.9 g/cm³ |
Typical for Chromium Molybdenum Steel |
GB/T 3077 Grade 20CrMo Annealed thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
23.0 °C |
Coefficient of thermal expansion of 1.1E-5 - 1.4E-5 1/K |
Typical for Chromium Molybdenum Steel |
| Melting point |
- |
Melting point of 1382 - 1529 °C |
Typical for Chromium Molybdenum Steel |
| Specific heat capacity |
23.0 °C |
Specific heat capacity of 448 - 502 J/(kg·K) |
Typical for Chromium Molybdenum Steel |
| Thermal conductivity |
23.0 °C |
Thermal conductivity of 36 - 43 W/(m·K) |
Typical for Chromium Molybdenum Steel |
GB/T 3077 Grade 20CrMo Annealed chemical
| Property |
Value |
| Carbon |
Carbon of 0.17 - 0.24 % |
| Chromium |
Chromium of 0.8 - 1.1 % |
| Copper |
Copper of 0.3 % |
| Iron |
Balance |
| Manganese |
Manganese of 0.4 - 0.7 % |
| Molybdenum |
Molybdenum of 0.15 % |
| Phosphorus |
Phosphorus of 0.03 % |
| Silicon |
Silicon of 0.17 - 0.37 % |
| Sulfur |
Sulfur of 0.03 % |
GB/T 3077 Grade 20CrMo Annealed mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
23.0 °C |
Elastic modulus of 200 - 215 GPa |
Typical for Chromium Molybdenum Steel |
| Elongation |
23.0 °C |
Elongation of 12 % |
- |
| Hardness, Brinell |
23.0 °C |
Hardness, Brinell of 197 [-] |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.29 [-] |
Typical for Chromium Molybdenum Steel |
| Tensile strength |
23.0 °C |
Tensile strength of 885 MPa |
- |
| Yield strength |
23.0 °C |
Yield strength of 685 MPa |
- |
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