France AFNOR NF A 35-579, Z53CMN21-09Az 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 | Z53CMN21-09Az | AFNOR | France | Valve steels and alloys for internal combustion engines | 
| C | Si | Mn | P | S | Cr | Ni | Mo | N | 
|---|---|---|---|---|---|---|---|---|
| 0.48 -0.58 | ≤0.25 | 8.00 -10.00 | ≤0.040 | ≤0.030 | 20.00 -22.00 | 3.25 -4.50 | ≤ ≥ | 0.38 -0.50 | 
| 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) | 
|---|---|---|---|---|---|---|
| 529 (≥) | 357 (≥) | 13 | 41 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 334 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 43 | - | - | 0.31 | - | |||
| 254 | 967 | - | 33.3 | 314 | - | ||
| 951 | - | 32 | 13.2 | 214 | 211 | 
Heat treated : 1813°C - 1143°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| Z53CMN21-09Az | 
| NF A 35-579 | Valve steels and alloys for internal combustion engines | NF-A-35-579.pdf | 
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