DIN 17480 Grade X45CrNiW18-9 solution heat-treated and precipitation hardened (+AT+P)
DIN 17480 Grade X45CrNiW18-9 solution heat-treated and precipitation hardened (+AT+P) introduction
X45CrNiW18-9 is an austenitic Cr-Ni-W-alloyed valve steel. The steel shows sufficient corrosion resistance in exhaust condensate and good resistance to lead compounds at increased temperatures.
Application at operating temperatures up to 730 deg.
Use: exhaust valves, valves
Equivalent material: JIS SUH31, KS STR31, EN X45CrNiW18-9, DIN 1.4873, DIN X45CrNiW18-9, EN 1.4873
DIN 17480 Grade X45CrNiW18-9 solution heat-treated and precipitation hardened (+AT+P) general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.9 g/cm³ |
DIN 17480 Grade X45CrNiW18-9 solution heat-treated and precipitation hardened (+AT+P) thermal
| Property |
Temperature |
Value |
Comment |
| Coefficient of thermal expansion |
100.0 °C |
Coefficient of thermal expansion of 1.55E-5 1/K |
- |
| - |
300.0 °C |
Coefficient of thermal expansion of 1.75E-5 1/K |
- |
| - |
500.0 °C |
Coefficient of thermal expansion of 1.82E-5 1/K |
- |
| - |
700.0 °C |
Coefficient of thermal expansion of 1.86E-5 1/K |
- |
| Max service temperature, long |
- |
Max service temperature, long of 0 - 730 °C |
- |
| Melting point |
- |
Melting point of 1230 - 1480 °C |
Typical for Austenitic Stainless Steel |
| Specific heat capacity |
20.0 °C |
Specific heat capacity of 500 J/(kg·K) |
- |
| Thermal conductivity |
20.0 °C |
Thermal conductivity of 14.5 W/(m·K) |
- |
DIN 17480 Grade X45CrNiW18-9 solution heat-treated and precipitation hardened (+AT+P) chemical
| Property |
Value |
| Carbon |
Carbon of 0.4 - 0.5 % |
| Chromium |
Chromium of 17 - 19 % |
| Manganese |
Manganese of 0.8 - 1.5 % |
| Nickel |
Nickel of 8 - 10 % |
| Phosphorus |
Phosphorus of 0.05 % |
| Silicon |
Silicon of 2 - 3 % |
| Sulfur |
Sulfur of 0.03 % |
| Tungsten |
Tungsten of 0.8 - 1.2 % |
DIN 17480 Grade X45CrNiW18-9 solution heat-treated and precipitation hardened (+AT+P) electrical
| Property |
Temperature |
Value |
Comment |
| Electrical resistivity |
23.0 °C |
Electrical resistivity of 8.5E-7 Ω·m |
Typical for Austenitic Stainless Steel |
DIN 17480 Grade X45CrNiW18-9 solution heat-treated and precipitation hardened (+AT+P) mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
20.0 °C |
Elastic modulus of 205 GPa |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.3 [-] |
Typical for Austenitic Stainless Steel |
| Shear modulus |
23.0 °C |
Shear modulus of 77 GPa |
Typical for Austenitic Stainless Steel |
| Tensile strength |
500.0 °C |
Tensile strength of 600 MPa |
- |
| - |
550.0 °C |
Tensile strength of 550 MPa |
- |
| - |
600.0 °C |
Tensile strength of 500 MPa |
- |
| - |
650.0 °C |
Tensile strength of 410 MPa |
- |
| - |
700.0 °C |
Tensile strength of 350 MPa |
- |
| - |
750.0 °C |
Tensile strength of 270 MPa |
- |
| - |
800.0 °C |
Tensile strength of 180 MPa |
- |
| Yield strength Rp0.2 |
500.0 °C |
Yield strength Rp0.2 of 250 MPa |
- |
| - |
550.0 °C |
Yield strength Rp0.2 of 230 MPa |
- |
| - |
600.0 °C |
Yield strength Rp0.2 of 210 MPa |
- |
| - |
650.0 °C |
Yield strength Rp0.2 of 190 MPa |
- |
| - |
700.0 °C |
Yield strength Rp0.2 of 170 MPa |
- |
| - |
750.0 °C |
Yield strength Rp0.2 of 140 MPa |
- |
| - |
800.0 °C |
Yield strength Rp0.2 of 100 MPa |
- |
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