EN 10083-1 Grade 25CrMo4 quenched and tempered (+QT)
EN 10083-1 Grade 25CrMo4 quenched and tempered (+QT) introduction
Steel 25CrMo4 is suitable for parts of high strength and ductility requirements and mean and higher heat-treatment sections in vehicle manufacturing, engine and machine engineering (e.g. crankshafts, steering knuckles, pinions). Lowest working temperature -20 °C.
Equivalent material: NBN 25CrMo4, GB 30CrMoA, AFNOR 25CD4, BS 708M25, GOST 30ChM, ISO 25CrMo4, UNI 25CrMo4, JIS SCM430, PN C25HM, SS 2225, UNE F1251-30CrMo4, ASTM 4130, SAE 4130, DIN 25CrMo4, GB 30CrMo, GB A30302, IS 21Cr4Mo2, JIS SCM425H, JIS SCM425, KS SCM420, KS SCM430, GOST 30ХM, ASTM A304 Grade 4130H, ASTM A914 Grade 4130H, UNS H41300, EN 1.7218, DIN 1.7214, AFNOR 25 CD 4 S, AFNOR 9160C083, AFNOR 9160/C 39, AFNOR 25CrMo4, BS FE-PL1502, BS 25CrMo4, AISI 4130, EN 1.7214, UNS J24056, IS 26Cr4Mo2, DIN 1.7218, BS 1717CDS110, BS 708A25, UNI 25CrMo4(KB), UNE 55Cr3, AISI 4130H, SAE 4130H, JIS SM420, JIS SCM420, JIS SCCrM1A, JIS SCCrM1B, ASTM 4130H, UNS G41300
EN 10083-1 Grade 25CrMo4 quenched and tempered (+QT) general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.83 - 7.85 g/cm³ |
EN 10083-1 Grade 25CrMo4 quenched and tempered (+QT) 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 1.11E-5 - 1.21E-5 1/K |
- |
| - |
200.0 °C |
Coefficient of thermal expansion of 1.21E-5 - 1.27E-5 1/K |
- |
| - |
300.0 °C |
Coefficient of thermal expansion of 1.29E-5 - 1.32E-5 1/K |
- |
| - |
400.0 °C |
Coefficient of thermal expansion of 1.35E-5 - 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 -20 - 200 °C |
- |
| Melting point |
- |
Melting point of 1382 - 1529 °C |
Typical for 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 41 - 50 W/(m·K) |
- |
| - |
100.0 °C |
Thermal conductivity of 42.7 W/(m·K) |
- |
| - |
200.0 °C |
Thermal conductivity of 42.8 W/(m·K) |
- |
| - |
300.0 °C |
Thermal conductivity of 41.6 W/(m·K) |
- |
| - |
400.0 °C |
Thermal conductivity of 39.9 W/(m·K) |
- |
| - |
500.0 °C |
Thermal conductivity of 37.8 W/(m·K) |
- |
| - |
600.0 °C |
Thermal conductivity of 35.6 W/(m·K) |
- |
| Thermal diffusivity |
20.0 °C |
Thermal diffusivity of 11.4 mm²/s |
- |
| - |
100.0 °C |
Thermal diffusivity of 11 mm²/s |
- |
| - |
200.0 °C |
Thermal diffusivity of 10.3 mm²/s |
- |
| - |
300.0 °C |
Thermal diffusivity of 9.5 mm²/s |
- |
| - |
400.0 °C |
Thermal diffusivity of 8.5 mm²/s |
- |
| - |
500.0 °C |
Thermal diffusivity of 7.3 mm²/s |
- |
| - |
600.0 °C |
Thermal diffusivity of 6 mm²/s |
- |
EN 10083-1 Grade 25CrMo4 quenched and tempered (+QT) chemical
| Property |
Value |
| Carbon |
Carbon of 0.22 - 0.29 % |
| Chromium |
Chromium of 0.9 - 1.2 % |
| Copper |
Copper of 0.4 % |
| Manganese |
Manganese of 0.6 - 0.9 % |
| Molybdenum |
Molybdenum of 0.15 - 0.3 % |
| Phosphorus |
Phosphorus of 0.03 - 0.04 % |
| Silicon |
Silicon of 0.1 - 0.4 % |
| Sulfur |
Sulfur of 0.035 % |
EN 10083-1 Grade 25CrMo4 quenched and tempered (+QT) electrical
| Property |
Temperature |
Value |
| Electrical resistivity |
20.0 °C |
Electrical resistivity of 1.8E-7 - 2.54E-7 Ω·m |
| - |
100.0 °C |
Electrical resistivity of 3E-7 Ω·m |
| - |
200.0 °C |
Electrical resistivity of 3.69E-7 Ω·m |
| - |
300.0 °C |
Electrical resistivity of 4.51E-7 Ω·m |
| - |
400.0 °C |
Electrical resistivity of 5.45E-7 Ω·m |
| - |
500.0 °C |
Electrical resistivity of 6.54E-7 Ω·m |
| - |
600.0 °C |
Electrical resistivity of 7.78E-7 Ω·m |
EN 10083-1 Grade 25CrMo4 quenched and tempered (+QT) mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
-100.0 °C |
Elastic modulus of 217 GPa |
- |
| - |
20.0 °C |
Elastic modulus of 210 - 212 GPa |
- |
| - |
100.0 °C |
Elastic modulus of 205 - 207 GPa |
- |
| - |
200.0 °C |
Elastic modulus of 195 - 199 GPa |
- |
| - |
300.0 °C |
Elastic modulus of 185 - 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 |
- |
| Elongation |
20.0 °C |
Elongation of 12 - 16 % |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.29 [-] |
Typical for Chromium Molybdenum Steel |
| Reduction of area |
20.0 °C |
Reduction of area of 50 - 60 % |
- |
| Shear modulus |
20.0 °C |
Shear modulus of 81 GPa |
- |
| Tensile strength |
20.0 °C |
Tensile strength of 650 - 1100 MPa |
- |
| Yield strength |
20.0 °C |
Yield strength of 400 - 700 MPa |
- |
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