France AFNOR NF EN 10090, X55CrMnNiN20-8 Specialsteel Valve steels and alloys for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
Category | Class | Grade | Standard | Country | Application |
---|---|---|---|---|---|
Steel Grades | Specialsteel | X55CrMnNiN20-8 | AFNOR | France | Valve steels and alloys for internal combustion engines |
C | Si | Mn | P | S | Cr | Ni | Mo | N |
---|---|---|---|---|---|---|---|---|
0.50 -0.60 | ≤0.25 | 7.00 -10.00 | ≤0.035 | ≤0.030 | 19.50 -21.50 | 1.50 -2.75 | ≤ ≥ | 0.20 -0.40 |
Yield Rp0.2 (MPa) |
Tensile Rm (MPa) |
Impact KV/Ku (J) |
Elongation A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
---|---|---|---|---|---|---|
144 (≥) | 846 (≥) | 14 | 44 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 124 |
Temperature (°C) |
Modulus of elasticity (GPa) |
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and | Thermal conductivity (W/m·°C) |
Specific thermal capacity (J/kg·°C) |
Specific electrical resistivity (Ω mm²/m) |
Density (kg/dm³) |
Poisson’s coefficient, ν |
---|---|---|---|---|---|---|---|
41 | - | - | 0.31 | - | |||
811 | 779 | - | 21.3 | 432 | - | ||
157 | - | 11 | 13.2 | 344 | 332 |
Heat treated : 1564°C - 1515°C
Grade | Standard | Country | Application |
---|---|---|---|
X55CrMnNiN20-8 | |||
X55CrMnNiN20-8 |
NF EN 10090 | Valve steels and alloys for internal combustion engines | NF-EN-10090.pdf |
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