International ISO ISO 683-15 (1992), X50CrMnNiNbN21-9 Specialsteel Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
Category | Class | Grade | Type | Standard | Country | Application |
---|---|---|---|---|---|---|
Steel Grades | Specialsteel | X50CrMnNiNbN21-9 | Austenite | ISO | International | Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines |
C | Si | Mn | P | S | Cr | Mo | Ni | W | Nb+Ta | N |
---|---|---|---|---|---|---|---|---|---|---|
0.45 -0.55 | ≤0.45 | 8.00 -10.00 | ≤0.050 | ≤0.030 | 20.00 -22.00 | ≤ ≥ | 3.50 -5.50 | 0.80 -1.50 | 1.80 -2.50 | 0.40 -0.60 |
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) |
---|---|---|---|---|---|---|
783 (≥) | 495 (≥) | 42 | 12 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 444 |
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 |
---|---|---|---|---|---|---|---|
31 | - | - | 0.32 | - | |||
612 | 186 | - | 11.3 | 243 | - | ||
281 | - | 33 | 44.2 | 132 | 423 |
Heat treated : 1444°C - 1348°C
Grade | Standard | Country | Application |
---|---|---|---|
X50CrMnNiNbN21-9 | |||
X50CrMnNiNbN21-9 |
ISO 683-15 (1992) | Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines | ISO-683-15-(1992).pdf |
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