SEW 555 Grade X21CrMoV12-1 quenched and tempered (+QT)
SEW 555 Grade X21CrMoV12-1 quenched and tempered (+QT) introduction
The high temperature alloy steel X21CrMoV12-1 is used for larger preshaped components in the quenched and tempered condition in turbine and generator installations, in particular as shafts and discs.
The steel is weldable if the relevant measures required are observed.
Equivalent material: DIN 1.4926, EN X21CrMoV12-1, EN 1.4926
SEW 555 Grade X21CrMoV12-1 quenched and tempered (+QT) general
| Property | Temperature | Value |
|---|---|---|
| Density | 20.0 °C | Density of 7.7 - 7.76 g/cm³ |
SEW 555 Grade X21CrMoV12-1 quenched and tempered (+QT) thermal
| Property | Temperature | Value | Comment |
|---|---|---|---|
| Coefficient of thermal expansion | 20.0 °C | Coefficient of thermal expansion of 1.02E-5 1/K | - |
| - | 100.0 °C | Coefficient of thermal expansion of 1.05E-5 1/K | - |
| - | 200.0 °C | Coefficient of thermal expansion of 1.09E-5 - 1.1E-5 1/K | - |
| - | 300.0 °C | Coefficient of thermal expansion of 1.13E-5 - 1.15E-5 1/K | - |
| - | 400.0 °C | Coefficient of thermal expansion of 1.16E-5 - 1.2E-5 1/K | - |
| - | 500.0 °C | Coefficient of thermal expansion of 1.2E-5 - 1.23E-5 1/K | - |
| - | 600.0 °C | Coefficient of thermal expansion of 1.22E-5 - 1.25E-5 1/K | - |
| Max service temperature, long | - | Max service temperature, long of 0 - 600 °C | - |
| Melting point | - | Melting point of 1370 - 1530 °C | Typical for Martensitic Stainless Steel |
| Specific heat capacity | 20.0 °C | Specific heat capacity of 439 J/(kg·K) | - |
| - | 100.0 °C | Specific heat capacity of 474 J/(kg·K) | - |
| - | 200.0 °C | Specific heat capacity of 498 J/(kg·K) | - |
| - | 300.0 °C | Specific heat capacity of 517 J/(kg·K) | - |
| - | 400.0 °C | Specific heat capacity of 538 J/(kg·K) | - |
| - | 500.0 °C | Specific heat capacity of 564 J/(kg·K) | - |
| - | 600.0 °C | Specific heat capacity of 598 J/(kg·K) | - |
| Thermal conductivity | 20.0 °C | Thermal conductivity of 24 W/(m·K) | - |
| - | 100.0 °C | Thermal conductivity of 24 - 24.4 W/(m·K) | - |
| - | 200.0 °C | Thermal conductivity of 24.8 - 25 W/(m·K) | - |
| - | 300.0 °C | Thermal conductivity of 25 - 25.1 W/(m·K) | - |
| - | 400.0 °C | Thermal conductivity of 25.6 - 26 W/(m·K) | - |
| - | 500.0 °C | Thermal conductivity of 26 - 26.1 W/(m·K) | - |
| - | 600.0 °C | Thermal conductivity of 26 - 26.4 W/(m·K) | - |
| Thermal diffusivity | 20.0 °C | Thermal diffusivity of 7.1 mm²/s | - |
| - | 100.0 °C | Thermal diffusivity of 6.3 mm²/s | - |
| - | 200.0 °C | Thermal diffusivity of 6 mm²/s | - |
| - | 300.0 °C | Thermal diffusivity of 5.7 mm²/s | - |
| - | 400.0 °C | Thermal diffusivity of 5.4 mm²/s | - |
| - | 500.0 °C | Thermal diffusivity of 4.9 mm²/s | - |
| - | 600.0 °C | Thermal diffusivity of 4.1 mm²/s | - |
SEW 555 Grade X21CrMoV12-1 quenched and tempered (+QT) chemical
| Property | Value |
|---|---|
| Carbon | Carbon of 0.2 - 0.26 % |
| Chromium | Chromium of 11 - 12.5 % |
| Manganese | Manganese of 0.3 - 0.8 % |
| Molybdenum | Molybdenum of 0.8 - 1.2 % |
| Nickel | Nickel of 0.3 - 0.8 % |
| Phosphorus | Phosphorus of 0.02 - 0.03 % |
| Silicon | Silicon of 0.2 - 0.5 % |
| Sulfur | Sulfur of 0.007 - 0.02 % |
| Vanadium | Vanadium of 0.25 - 0.35 % |
SEW 555 Grade X21CrMoV12-1 quenched and tempered (+QT) electrical
| Property | Temperature | Value |
|---|---|---|
| Electrical resistivity | 20.0 °C | Electrical resistivity of 6.03E-7 Ω·m |
| - | 100.0 °C | Electrical resistivity of 6.68E-7 Ω·m |
| - | 200.0 °C | Electrical resistivity of 7.43E-7 Ω·m |
| - | 300.0 °C | Electrical resistivity of 8.17E-7 Ω·m |
| - | 400.0 °C | Electrical resistivity of 8.9E-7 Ω·m |
| - | 500.0 °C | Electrical resistivity of 9.62E-7 Ω·m |
| - | 600.0 °C | Electrical resistivity of 1.04E-6 Ω·m |
SEW 555 Grade X21CrMoV12-1 quenched and tempered (+QT) mechanical
| Property | Temperature | Value |
|---|---|---|
| Elastic modulus | 20.0 °C | Elastic modulus of 217.68 - 218 GPa |
| - | 100.0 °C | Elastic modulus of 213 GPa |
| - | 200.0 °C | Elastic modulus of 206 GPa |
| - | 300.0 °C | Elastic modulus of 198 GPa |
| - | 400.0 °C | Elastic modulus of 189 - 190 GPa |
| - | 500.0 °C | Elastic modulus of 179 - 180 GPa |
| - | 600.0 °C | Elastic modulus of 166 - 167 GPa |
| Elongation, transverse | 20.0 °C | Elongation, transverse of 11 % |
| Poisson's ratio | 20.0 °C | Poisson's ratio of 0.28 [-] |
| Reduction of area, transverse | 20.0 °C | Reduction of area, transverse of 40 % |
| Shear modulus | 20.0 °C | Shear modulus of 84.95 GPa |
| Tensile strength, transverse | 20.0 °C | Tensile strength, transverse of 750 - 900 MPa |
| Yield strength Rp0.2 | 100.0 °C | Yield strength Rp0.2 of 575 MPa |
| - | 200.0 °C | Yield strength Rp0.2 of 530 MPa |
| - | 250.0 °C | Yield strength Rp0.2 of 505 MPa |
| - | 300.0 °C | Yield strength Rp0.2 of 480 MPa |
| - | 350.0 °C | Yield strength Rp0.2 of 450 MPa |
| - | 400.0 °C | Yield strength Rp0.2 of 425 MPa |
| - | 450.0 °C | Yield strength Rp0.2 of 380 MPa |
| - | 500.0 °C | Yield strength Rp0.2 of 345 MPa |
| - | 550.0 °C | Yield strength Rp0.2 of 285 MPa |
| - | 600.0 °C | Yield strength Rp0.2 of 205 MPa |
| Yield strength Rp0.2, transverse | 20.0 °C | Yield strength Rp0.2, transverse of 600 MPa |
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