France AFNOR NF A 35-579, Z53CMNNb21-09-02Az 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 | Z53CMNNb21-09-02Az | AFNOR | France | Valve steels and alloys for internal combustion engines |
C | Si | Mn | P | S | Cr | Ni | Mo | Nb | N |
---|---|---|---|---|---|---|---|---|---|
0.48 -0.58 | ≤0.25 | 8.00 -10.00 | ≤0.040 | ≤0.030 | 20.00 -22.00 | 3.25 -4.50 | ≤ ≥ | 1.70 -2.30 | 0.38 -0.55 |
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) |
---|---|---|---|---|---|---|
984 (≥) | 985 (≥) | 43 | 14 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 414 |
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 |
---|---|---|---|---|---|---|---|
44 | - | - | 0.12 | - | |||
581 | 495 | - | 14.3 | 421 | - | ||
972 | - | 21 | 23.2 | 341 | 223 |
Heat treated : 1322°C - 1692°C
Grade | Standard | Country | Application |
---|---|---|---|
Z53CMNNb21-09-02Az |
NF A 35-579 | Valve steels and alloys for internal combustion engines | NF-A-35-579.pdf |
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