DIN 17230 Grade 48CrMo4 quenched and tempered (+QT)
DIN 17230 Grade 48CrMo4 quenched and tempered (+QT) introduction
48 CrMo 4 is an anti-friction bearing steel that can be refined and induction hardened. In the Jominy test it reaches surface hardnesses of approximately 65 HRC. It is used for larger dimensions of anti-friction bearing parts (rings and discs).
Equivalent material: DIN 1.3565, EN 1.3565
DIN 17230 Grade 48CrMo4 quenched and tempered (+QT) general
| Property | Temperature | Value |
|---|---|---|
| Density | 20.0 °C | Density of 7.83 - 7.85 g/cm³ |
DIN 17230 Grade 48CrMo4 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 1.21E-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 | - |
| 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 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 45.1 W/(m·K) | - |
| - | 100.0 °C | Thermal conductivity of 45.1 W/(m·K) | - |
| - | 200.0 °C | Thermal conductivity of 44.1 W/(m·K) | - |
| - | 300.0 °C | Thermal conductivity of 41.9 W/(m·K) | - |
| - | 400.0 °C | Thermal conductivity of 39.4 W/(m·K) | - |
| - | 500.0 °C | Thermal conductivity of 36.9 W/(m·K) | - |
| - | 600.0 °C | Thermal conductivity of 34.4 W/(m·K) | - |
| Thermal diffusivity | 20.0 °C | Thermal diffusivity of 12.5 mm²/s | - |
| - | 100.0 °C | Thermal diffusivity of 11.6 mm²/s | - |
| - | 200.0 °C | Thermal diffusivity of 10.6 mm²/s | - |
| - | 300.0 °C | Thermal diffusivity of 9.5 mm²/s | - |
| - | 400.0 °C | Thermal diffusivity of 8.4 mm²/s | - |
| - | 500.0 °C | Thermal diffusivity of 7.1 mm²/s | - |
| - | 600.0 °C | Thermal diffusivity of 5.8 mm²/s | - |
DIN 17230 Grade 48CrMo4 quenched and tempered (+QT) chemical
| Property | Value |
|---|---|
| Carbon | Carbon of 0.46 - 0.52 % |
| Chromium | Chromium of 0.9 - 1.2 % |
| Copper | Copper of 0.3 % |
| Manganese | Manganese of 0.5 - 0.8 % |
| Molybdenum | Molybdenum of 0.15 - 0.35 % |
| Phosphorus | Phosphorus of 0.03 % |
| Silicon | Silicon of 0.4 % |
| Sulfur | Sulfur of 0.035 % |
DIN 17230 Grade 48CrMo4 quenched and tempered (+QT) electrical
| Property | Temperature | Value |
|---|---|---|
| Electrical resistivity | 20.0 °C | Electrical resistivity of 2.31E-7 Ω·m |
| - | 100.0 °C | Electrical resistivity of 2.84E-7 Ω·m |
| - | 200.0 °C | Electrical resistivity of 3.58E-7 Ω·m |
| - | 300.0 °C | Electrical resistivity of 4.48E-7 Ω·m |
| - | 400.0 °C | Electrical resistivity of 5.52E-7 Ω·m |
| - | 500.0 °C | Electrical resistivity of 6.71E-7 Ω·m |
| - | 600.0 °C | Electrical resistivity of 8.06E-7 Ω·m |
DIN 17230 Grade 48CrMo4 quenched and tempered (+QT) mechanical
| Property | Temperature | Value |
|---|---|---|
| Elastic modulus | -100.0 °C | Elastic modulus of 217 GPa |
| - | 20.0 °C | Elastic modulus of 212 GPa |
| - | 100.0 °C | Elastic modulus of 207 GPa |
| - | 200.0 °C | Elastic modulus of 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 |
| Elongation | 20.0 °C | Elongation of 9 - 13 % |
| Poisson's ratio | 20.0 °C | Poisson's ratio of 0.28 [-] |
| Reduction of area | 20.0 °C | Reduction of area of 40 - 50 % |
| Tensile strength | 20.0 °C | Tensile strength of 800 - 1300 MPa |
| Yield strength | 20.0 °C | Yield strength of 600 - 900 MPa |
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