France AFNOR NF EN 10090, X50CrMnNiNbN21-9 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 | X50CrMnNiNbN21-9 | AFNOR | France | Valve steels and alloys for internal combustion engines |
C | Si | Mn | P | S | Cr | Ni | Mo | N | W |
---|---|---|---|---|---|---|---|---|---|
0.45 -0.55 | ≤0.45 | 8.00 -10.00 | ≤0.045 | ≤0.030 | 20.00 -22.00 | 3.50 -5.50 | ≤ ≥ | 0.40 -0.60 | 0.80 -1.50 |
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) |
---|---|---|---|---|---|---|
248 (≥) | 565 (≥) | 23 | 44 | 31 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 111 |
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 |
---|---|---|---|---|---|---|---|
11 | - | - | 0.44 | - | |||
891 | 843 | - | 13.3 | 434 | - | ||
122 | - | 14 | 11.2 | 423 | 123 |
Heat treated : 1721°C - 1483°C
Grade | Standard | Country | Application |
---|---|---|---|
X50CrMnNiNbN21-9 | |||
X50CrMnNiNbN21-9 |
NF EN 10090 | Valve steels and alloys for internal combustion engines | NF-EN-10090.pdf |
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