France AFNOR NF A 35-579, Z45CS9 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 | Z45CS9 | AFNOR | France | Valve steels and alloys for internal combustion engines | 
| C | Si | Mn | P | S | Cr | Ni | Mo | 
|---|---|---|---|---|---|---|---|
| 0.40 -0.50 | 2.70 -3.30 | ≤0.80 | ≤0.040 | ≤0.030 | 8.00 -10.00 | ≤ ≥ | ≤ ≥ | 
| 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) | 
|---|---|---|---|---|---|---|
| 599 (≥) | 124 (≥) | 22 | 13 | 13 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 221 | 
| 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 | 
|---|---|---|---|---|---|---|---|
| 42 | - | - | 0.21 | - | |||
| 865 | 218 | - | 24.3 | 122 | - | ||
| 214 | - | 22 | 32.2 | 233 | 124 | 
Heat treated : 1852°C - 1319°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| Z45CS9 | 
| NF A 35-579 | Valve steels and alloys for internal combustion engines | NF-A-35-579.pdf | 
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