EN 10083-2 Grade C40 quenched and tempered (+QT)
EN 10083-2 Grade C40 quenched and tempered (+QT) introduction
Steel C40 is suitable for larger forged parts in vehicle manufacturing and machine engineering (e.g. road wheels, axles).
Equivalent material: GB 40, GB U20402, IS 40C8, ISO C40, JIS S40C, KS SM40C, GOST 40, ASTM A29 Grade 1040, ASTM A510 Grade 1040, ASTM A576 Grade 1040, ASTM A827 Grade 1040, UNS G10400, SAE 1040, EN 1.0511, ASTM A830 Grade 1040, DIN 1.0511, DIN C40, AFNOR C40, AFNOR AF60, BS 40CS, BS 40HS, BS En8, BS C40, BS 080M40, UNI C40, AISI 1040, JIS SWRH42B, JIS SWRCH40K, JIS S38C, ISO CS40, GB/T 40, GB/T U20402, GB/T ML40, ASTM Grade 1040, ASTM Grade SC1040
EN 10083-2 Grade C40 quenched and tempered (+QT) general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.8 - 7.85 g/cm³ |
EN 10083-2 Grade C40 quenched and tempered (+QT) thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
-100.0 °C |
Coefficient of thermal expansion of 1.08E-5 1/K |
- |
| - |
20.0 °C |
Coefficient of thermal expansion of 1.19E-5 1/K |
- |
| - |
100.0 °C |
Coefficient of thermal expansion of 1.11E-5 - 1.25E-5 1/K |
- |
| - |
200.0 °C |
Coefficient of thermal expansion of 1.21E-5 - 1.3E-5 1/K |
- |
| - |
300.0 °C |
Coefficient of thermal expansion of 1.29E-5 - 1.36E-5 1/K |
- |
| - |
400.0 °C |
Coefficient of thermal expansion of 1.35E-5 - 1.41E-5 1/K |
- |
| - |
500.0 °C |
Coefficient of thermal expansion of 1.45E-5 1/K |
- |
| - |
600.0 °C |
Coefficient of thermal expansion of 1.49E-5 1/K |
- |
| Max service temperature |
- |
Max service temperature of 500 °C |
Typical for Carbon Steel |
| Melting point |
- |
Melting point of 1380 - 1514 °C |
Typical for Medium Carbon Steel |
| Specific heat capacity |
-100.0 °C |
Specific heat capacity of 423 J/(kg·K) |
- |
| - |
20.0 °C |
Specific heat capacity of 461 - 480 J/(kg·K) |
- |
| - |
100.0 °C |
Specific heat capacity of 479 - 500 J/(kg·K) |
- |
| - |
200.0 °C |
Specific heat capacity of 499 - 550 J/(kg·K) |
- |
| - |
300.0 °C |
Specific heat capacity of 517 - 590 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 44.9 - 52 W/(m·K) |
- |
| - |
100.0 °C |
Thermal conductivity of 46.2 - 50.6 W/(m·K) |
- |
| - |
200.0 °C |
Thermal conductivity of 45.5 - 48.1 W/(m·K) |
- |
| - |
300.0 °C |
Thermal conductivity of 43.1 - 45.7 W/(m·K) |
- |
| - |
400.0 °C |
Thermal conductivity of 40.4 W/(m·K) |
- |
| - |
500.0 °C |
Thermal conductivity of 37.7 W/(m·K) |
- |
| - |
600.0 °C |
Thermal conductivity of 34.9 W/(m·K) |
- |
| Thermal diffusivity |
20.0 °C |
Thermal diffusivity of 12.5 mm²/s |
- |
| - |
100.0 °C |
Thermal diffusivity of 12 mm²/s |
- |
| - |
200.0 °C |
Thermal diffusivity of 11 mm²/s |
- |
| - |
300.0 °C |
Thermal diffusivity of 9.8 mm²/s |
- |
| - |
400.0 °C |
Thermal diffusivity of 8.6 mm²/s |
- |
| - |
500.0 °C |
Thermal diffusivity of 7.3 mm²/s |
- |
| - |
600.0 °C |
Thermal diffusivity of 5.9 mm²/s |
- |
EN 10083-2 Grade C40 quenched and tempered (+QT) chemical
| Property |
Value |
| Carbon |
Carbon of 0.37 - 0.44 % |
| Chromium |
Chromium of 0.4 % |
| Copper |
Copper of 0.3 % |
| Manganese |
Manganese of 0.5 - 0.8 % |
| Molybdenum |
Molybdenum of 0.1 % |
| Nickel |
Nickel of 0.4 % |
| Phosphorus |
Phosphorus of 0.05 % |
| Silicon |
Silicon of 0.1 - 0.4 % |
| Sulfur |
Sulfur of 0.045 % |
EN 10083-2 Grade C40 quenched and tempered (+QT) electrical
| Property |
Temperature |
Value |
| Electrical resistivity |
20.0 °C |
Electrical resistivity of 1.2E-7 - 2.32E-7 Ω·m |
| - |
100.0 °C |
Electrical resistivity of 2.77E-7 Ω·m |
| - |
200.0 °C |
Electrical resistivity of 3.47E-7 Ω·m |
| - |
300.0 °C |
Electrical resistivity of 4.35E-7 Ω·m |
| - |
400.0 °C |
Electrical resistivity of 5.38E-7 Ω·m |
| - |
500.0 °C |
Electrical resistivity of 6.56E-7 Ω·m |
| - |
600.0 °C |
Electrical resistivity of 7.95E-7 Ω·m |
EN 10083-2 Grade C40 quenched and tempered (+QT) mechanical
| Property |
Temperature |
Value |
| 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 175 - 184 GPa |
| - |
500.0 °C |
Elastic modulus of 175 GPa |
| - |
600.0 °C |
Elastic modulus of 164 GPa |
| Elongation |
20.0 °C |
Elongation of 16 - 19 % |
| Poisson's ratio |
20.0 °C |
Poisson's ratio of 0.28 [-] |
| Reduction of area |
20.0 °C |
Reduction of area of 35 - 45 % |
| Shear modulus |
20.0 °C |
Shear modulus of 81 GPa |
| Tensile strength |
20.0 °C |
Tensile strength of 600 - 800 MPa |
| Yield strength |
20.0 °C |
Yield strength of 350 - 460 MPa |
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