France AFNOR NF A 35-579, Z40CSD10 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 | Z40CSD10 | AFNOR | France | Valve steels and alloys for internal combustion engines | 
| C | Si | Mn | P | S | Cr | Ni | Mo | 
|---|---|---|---|---|---|---|---|
| 0.35 -0.45 | 2.00 -3.00 | ≤0.80 | ≤0.040 | ≤0.030 | 9.50 -11.50 | ≤0.50 | 0.80 -1.30 | 
| 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) | 
|---|---|---|---|---|---|---|
| 578 (≥) | 228 (≥) | 34 | 12 | 13 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 131 | 
| 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 | - | - | 0.43 | - | |||
| 782 | 255 | - | 22.3 | 423 | - | ||
| 446 | - | 14 | 32.2 | 131 | 223 | 
Heat treated : 1745°C - 1353°C
| Grade | Standard | Country | Application | 
|---|---|---|---|
| Z40CSD10 | 
| NF A 35-579 | Valve steels and alloys for internal combustion engines | NF-A-35-579.pdf | 
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