France AFNOR NF EN 10090, 1.4748 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 | 1.4748 | AFNOR | France | Valve steels and alloys for internal combustion engines |
| C | Si | Mn | P | S | Cr | Ni | Mo | V |
|---|---|---|---|---|---|---|---|---|
| 0.80 -0.90 | ≤1.50 | ≤1.50 | ≤0.040 | ≤0.030 | 16.50 -18.50 | ≤ ≥ | 2.00 -2.50 | 0.30 -0.60 |
| 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) |
|---|---|---|---|---|---|---|
| 629 (≥) | 899 (≥) | 42 | 11 | 41 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 234 |
| 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 | - | - | 0.13 | - | |||
| 688 | 511 | - | 44.3 | 221 | - | ||
| 499 | - | 13 | 11.2 | 341 | 424 |
Heat treated : 1747°C - 1452°C
| Grade | Standard | Country | Application |
|---|---|---|---|
| X85CrMoV18-2 | |||
| X85CrMoV18-2 |
| NF EN 10090 | Valve steels and alloys for internal combustion engines | NF-EN-10090.pdf |
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