EN 10222-4 Grade P420QH quenched and tempered (+QT)
EN 10222-4 Grade P420QH quenched and tempered (+QT) introduction
Steel P420QH is a tempered weldable fine grained steel with a yield strength of max. 420 N/mm².
Application: pressure vessel construction, apparatus engineering, general machine and toolbuilding.
Equivalent material: DIN P420QH, ISO PL42, ISO PLH42, EN P420NH, DIN P420NH, DIN 1.8936, EN 1.8936
EN 10222-4 Grade P420QH quenched and tempered (+QT) general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.84 g/cm³ |
EN 10222-4 Grade P420QH quenched and tempered (+QT) thermal
| Property |
Temperature |
Value |
| 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 |
| 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 |
-100.0 °C |
Thermal conductivity of 35.4 W/(m·K) |
| - |
20.0 °C |
Thermal conductivity of 40.4 W/(m·K) |
| - |
100.0 °C |
Thermal conductivity of 42 W/(m·K) |
| - |
200.0 °C |
Thermal conductivity of 42 W/(m·K) |
| - |
300.0 °C |
Thermal conductivity of 40.8 W/(m·K) |
| - |
400.0 °C |
Thermal conductivity of 38.9 W/(m·K) |
| - |
500.0 °C |
Thermal conductivity of 36.6 W/(m·K) |
| - |
600.0 °C |
Thermal conductivity of 34.3 W/(m·K) |
| Thermal diffusivity |
-100.0 °C |
Thermal diffusivity of 12.1 mm²/s |
| - |
20.0 °C |
Thermal diffusivity of 11.2 mm²/s |
| - |
100.0 °C |
Thermal diffusivity of 10.8 mm²/s |
| - |
200.0 °C |
Thermal diffusivity of 10.1 mm²/s |
| - |
300.0 °C |
Thermal diffusivity of 9.3 mm²/s |
| - |
400.0 °C |
Thermal diffusivity of 8.3 mm²/s |
| - |
500.0 °C |
Thermal diffusivity of 7 mm²/s |
| - |
600.0 °C |
Thermal diffusivity of 5.8 mm²/s |
EN 10222-4 Grade P420QH quenched and tempered (+QT) chemical
| Property |
Value |
| Aluminium |
Aluminium of 0.02 - 0.06 % |
| Carbon |
Carbon of 0.2 % |
| Chromium |
Chromium of 0.3 % |
| Copper |
Copper of 0.2 % |
| Manganese |
Manganese of 1 - 1.7 % |
| Molybdenum |
Molybdenum of 0.1 % |
| Nickel |
Nickel of 1 % |
| Niobium |
Niobium of 0.05 % |
| Nitrogen |
Nitrogen of 0.02 % |
| Phosphorus |
Phosphorus of 0.02 - 0.03 % |
| Silicon |
Silicon of 0.1 - 0.6 % |
| Sulfur |
Sulfur of 0.008 - 0.015 % |
| Vanadium |
Vanadium of 0.15 - 0.2 % |
EN 10222-4 Grade P420QH quenched and tempered (+QT) electrical
| Property |
Temperature |
Value |
| Electrical resistivity |
-100.0 °C |
Electrical resistivity of 1.93E-7 Ω·m |
| - |
20.0 °C |
Electrical resistivity of 2.58E-7 Ω·m |
| - |
100.0 °C |
Electrical resistivity of 3.05E-7 Ω·m |
| - |
200.0 °C |
Electrical resistivity of 3.76E-7 Ω·m |
| - |
300.0 °C |
Electrical resistivity of 4.6E-7 Ω·m |
| - |
400.0 °C |
Electrical resistivity of 5.59E-7 Ω·m |
| - |
500.0 °C |
Electrical resistivity of 6.75E-7 Ω·m |
| - |
600.0 °C |
Electrical resistivity of 8.08E-7 Ω·m |
EN 10222-4 Grade P420QH 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 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 17 - 20 % |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.3 [-] |
Typical for Steel |
| Tensile strength |
20.0 °C |
Tensile strength of 510 - 680 MPa |
- |
| Yield strength |
20.0 °C |
Yield strength of 325 - 420 MPa |
- |
| - |
200.0 °C |
Yield strength of 343 MPa |
- |
| - |
250.0 °C |
Yield strength of 314 MPa |
- |
| - |
300.0 °C |
Yield strength of 294 MPa |
- |
| - |
350.0 °C |
Yield strength of 265 MPa |
- |
| - |
400.0 °C |
Yield strength of 235 MPa |
- |
| Yield strength Rp0.2 |
20.0 °C |
Yield strength Rp0.2 of 315 - 360 MPa |
- |
| - |
50.0 °C |
Yield strength Rp0.2 of 314 - 363 MPa |
- |
| - |
100.0 °C |
Yield strength Rp0.2 of 294 - 363 MPa |
- |
| - |
150.0 °C |
Yield strength Rp0.2 of 274 - 343 MPa |
- |
| - |
200.0 °C |
Yield strength Rp0.2 of 252 - 314 MPa |
- |
| - |
250.0 °C |
Yield strength Rp0.2 of 226 - 284 MPa |
- |
| - |
300.0 °C |
Yield strength Rp0.2 of 206 - 265 MPa |
- |
| - |
350.0 °C |
Yield strength Rp0.2 of 176 - 235 MPa |
- |
| - |
400.0 °C |
Yield strength Rp0.2 of 147 - 213 MPa |
- |
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