DIN 17240 Grade 21CrMoV5-7 quenched and tempered (+QT)
DIN 17240 Grade 21CrMoV5-7 quenched and tempered (+QT) introduction
High temperature steel for screws and bolts up to 540 °C.
Equivalent material: AFNOR 20CDV5.08, GOST 25Ch1MF, ISO 21CrMoV5-7, ÖNORM 21CrMoV5-7S, PN 26H2MF, DIN 1.7709, EN 21CrMoV5-7, EN 1.7709
DIN 17240 Grade 21CrMoV5-7 quenched and tempered (+QT) general
| Property | Temperature | Value |
|---|---|---|
| Density | 20.0 °C | Density of 7.84 g/cm³ |
DIN 17240 Grade 21CrMoV5-7 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 1.39E-5 - 1.4E-5 1/K | - |
| - | 600.0 °C | Coefficient of thermal expansion of 1.41E-5 - 1.44E-5 1/K | - |
| Max service temperature, long | - | Max service temperature, long of 0 - 540 °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 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 34.6 W/(m·K) | - |
| - | 100.0 °C | Thermal conductivity of 36.9 W/(m·K) | - |
| - | 200.0 °C | Thermal conductivity of 37.3 W/(m·K) | - |
| - | 300.0 °C | Thermal conductivity of 36.9 W/(m·K) | - |
| - | 400.0 °C | Thermal conductivity of 35.8 W/(m·K) | - |
| - | 500.0 °C | Thermal conductivity of 34.4 W/(m·K) | - |
| - | 600.0 °C | Thermal conductivity of 32.9 W/(m·K) | - |
| Thermal diffusivity | 20.0 °C | Thermal diffusivity of 9.6 mm²/s | - |
| - | 100.0 °C | Thermal diffusivity of 9.5 mm²/s | - |
| - | 200.0 °C | Thermal diffusivity of 9 mm²/s | - |
| - | 300.0 °C | Thermal diffusivity of 8.4 mm²/s | - |
| - | 400.0 °C | Thermal diffusivity of 7.6 mm²/s | - |
| - | 500.0 °C | Thermal diffusivity of 6.6 mm²/s | - |
| - | 600.0 °C | Thermal diffusivity of 5.5 mm²/s | - |
DIN 17240 Grade 21CrMoV5-7 quenched and tempered (+QT) chemical
| Property | Value |
|---|---|
| Carbon | Carbon of 0.17 - 0.25 % |
| Chromium | Chromium of 1.2 - 1.5 % |
| Manganese | Manganese of 0.35 - 0.85 % |
| Molybdenum | Molybdenum of 0.65 - 0.8 % |
| Phosphorus | Phosphorus of 0.03 % |
| Silicon | Silicon of 0.15 - 0.35 % |
| Sulfur | Sulfur of 0.035 % |
| Vanadium | Vanadium of 0.25 - 0.35 % |
DIN 17240 Grade 21CrMoV5-7 quenched and tempered (+QT) electrical
| Property | Temperature | Value |
|---|---|---|
| Electrical resistivity | 20.0 °C | Electrical resistivity of 3.01E-7 Ω·m |
| - | 100.0 °C | Electrical resistivity of 3.47E-7 Ω·m |
| - | 200.0 °C | Electrical resistivity of 4.23E-7 Ω·m |
| - | 300.0 °C | Electrical resistivity of 5.09E-7 Ω·m |
| - | 400.0 °C | Electrical resistivity of 6.08E-7 Ω·m |
| - | 500.0 °C | Electrical resistivity of 7.19E-7 Ω·m |
| - | 600.0 °C | Electrical resistivity of 8.43E-7 Ω·m |
DIN 17240 Grade 21CrMoV5-7 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 212 GPa | - |
| - | 100.0 °C | Elastic modulus of 204 - 207 GPa | - |
| - | 200.0 °C | Elastic modulus of 196 - 199 GPa | - |
| - | 300.0 °C | Elastic modulus of 186 - 192 GPa | - |
| - | 400.0 °C | Elastic modulus of 177 - 184 GPa | - |
| - | 500.0 °C | Elastic modulus of 164 - 175 GPa | - |
| - | 600.0 °C | Elastic modulus of 127 - 164 GPa | - |
| Elongation | 20.0 °C | Elongation of 16 % | - |
| Hardness, Brinell | 20.0 °C | Hardness, Brinell of 205 - 250 [-] | - |
| 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 60 % | - |
| Tensile strength | 20.0 °C | Tensile strength of 700 - 850 MPa | - |
| - | 300.0 °C | Tensile strength of 590 MPa | - |
| - | 350.0 °C | Tensile strength of 560 MPa | - |
| Yield strength Rp0.2 | 20.0 °C | Yield strength Rp0.2 of 550 MPa | - |
| - | 200.0 °C | Yield strength Rp0.2 of 500 MPa | - |
| - | 250.0 °C | Yield strength Rp0.2 of 480 MPa | - |
| - | 300.0 °C | Yield strength Rp0.2 of 460 MPa | - |
| - | 350.0 °C | Yield strength Rp0.2 of 441 MPa | - |
| - | 400.0 °C | Yield strength Rp0.2 of 412 MPa | - |
| - | 450.0 °C | Yield strength Rp0.2 of 372 MPa | - |
| - | 500.0 °C | Yield strength Rp0.2 of 334 MPa | - |
| - | 550.0 °C | Yield strength Rp0.2 of 275 MPa | - |
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