France AFNOR NF A 35-579, NC15Fe7TA 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 | NC15Fe7TA | AFNOR | France | Valve steels and alloys for internal combustion engines |
| C | Si | Mn | P | S | Cr | Ni | Mo | Fe | Al | Ti | Nb+Ta | Co | Cu |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ≤0.80 | ≤0.50 | ≤1.00 | ≤0.015 | ≤0.015 | 14.00 -17.00 | ≤remaining | ≤0.50 | 5.00 -9.00 | 0.40 -1.00 | 2.25 -2.75 | 0.70 -1.20 | ≤1.00 | ≤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) |
|---|---|---|---|---|---|---|
| 128 (≥) | 974 (≥) | 22 | 32 | 11 | 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 |
|---|---|---|---|---|---|---|---|
| 32 | - | - | 0.44 | - | |||
| 139 | 672 | - | 21.3 | 234 | - | ||
| 526 | - | 23 | 34.2 | 343 | 332 |
Heat treated : 1797°C - 1171°C
| Grade | Standard | Country | Application |
|---|---|---|---|
| NC15Fe7TA |
| NF A 35-579 | Valve steels and alloys for internal combustion engines | NF-A-35-579.pdf |
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