EN 10090 Grade X55CrMnNiN20-8 solution heat-treated and precipitation hardened (+AT+P)
EN 10090 Grade X55CrMnNiN20-8 solution heat-treated and precipitation hardened (+AT+P) introduction
X55CrMnNiN20-8 is an austenitic Cr-Mn-Ni-N-alloyed valve steel. The steel shows high corrosion resistance in exhaust condensate and to lead compounds at increased temperatures.
Use: inlet valves, exhaust valves, valves
Equivalent material: GB 55Cr21Mn8Ni2N, IS X55Cr21Mn8Ni2N, IS V-14, ISO X55CrMnNiN20-8, GOST X55CrMnNiN208, SAE EV12, SAE 21-2N, UNS S63012, DIN 1.4875, DIN X55CrMnNiN20-8, AFNOR X55CrMnNiN20-8, BS X55CrMnNiN20-8, AISI EV-12, SAE EV-12, EN 1.4875, GOST X55CrMnNiN20-8, GB/T 55Cr21Mn8Ni2N
EN 10090 Grade X55CrMnNiN20-8 solution heat-treated and precipitation hardened (+AT+P) general
| Property |
Temperature |
Value |
| Density |
20.0 °C |
Density of 7.8 g/cm³ |
EN 10090 Grade X55CrMnNiN20-8 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 1.85E-5 1/K |
- |
| - |
700.0 °C |
Coefficient of thermal expansion of 1.88E-5 1/K |
- |
| 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) |
- |
EN 10090 Grade X55CrMnNiN20-8 solution heat-treated and precipitation hardened (+AT+P) chemical
| Property |
Value |
| Carbon |
Carbon of 0.5 - 0.6 % |
| Chromium |
Chromium of 19.5 - 21.5 % |
| Manganese |
Manganese of 7 - 10 % |
| Nickel |
Nickel of 1.5 - 2.75 % |
| Nitrogen |
Nitrogen of 0.2 - 0.4 % |
| Phosphorus |
Phosphorus of 0.05 % |
| Silicon |
Silicon of 0.25 % |
| Sulfur |
Sulfur of 0.03 % |
EN 10090 Grade X55CrMnNiN20-8 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 |
EN 10090 Grade X55CrMnNiN20-8 solution heat-treated and precipitation hardened (+AT+P) mechanical
| Property |
Temperature |
Value |
Comment |
| Elastic modulus |
20.0 °C |
Elastic modulus of 205 GPa |
- |
| Elongation |
20.0 °C |
Elongation of 8 % |
- |
| Hardness, Rockwell C |
20.0 °C |
Hardness, Rockwell C of 28 [-] |
- |
| Poisson's ratio |
23.0 °C |
Poisson's ratio of 0.3 [-] |
Typical for Austenitic Stainless Steel |
| Reduction of area |
20.0 °C |
Reduction of area of 10 % |
- |
| Shear modulus |
23.0 °C |
Shear modulus of 77 GPa |
Typical for Austenitic Stainless Steel |
| Tensile strength |
20.0 °C |
Tensile strength of 900 - 1150 MPa |
- |
| - |
500.0 °C |
Tensile strength of 640 MPa |
- |
| - |
550.0 °C |
Tensile strength of 590 MPa |
- |
| - |
600.0 °C |
Tensile strength of 540 MPa |
- |
| - |
650.0 °C |
Tensile strength of 490 MPa |
- |
| - |
700.0 °C |
Tensile strength of 440 MPa |
- |
| - |
750.0 °C |
Tensile strength of 360 MPa |
- |
| - |
800.0 °C |
Tensile strength of 290 MPa |
- |
| Yield strength Rp0.2 |
20.0 °C |
Yield strength Rp0.2 of 550 MPa |
- |
| - |
500.0 °C |
Yield strength Rp0.2 of 300 MPa |
- |
| - |
550.0 °C |
Yield strength Rp0.2 of 280 MPa |
- |
| - |
600.0 °C |
Yield strength Rp0.2 of 250 MPa |
- |
| - |
650.0 °C |
Yield strength Rp0.2 of 230 MPa |
- |
| - |
700.0 °C |
Yield strength Rp0.2 of 220 MPa |
- |
| - |
750.0 °C |
Yield strength Rp0.2 of 200 MPa |
- |
| - |
800.0 °C |
Yield strength Rp0.2 of 170 MPa |
- |
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