France AFNOR NF EN 10028-4, NF EN 10222-3, NF EN 10269, X8Ni9 Specialsteel Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.
| Category | Class | Grade | Standard | Country | Application |
|---|---|---|---|---|---|
| Steel Grades | Specialsteel | X8Ni9 | AFNOR | France | Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties |
| C | Si | Mn | P | S | Cr | Ni | Mo | V |
|---|---|---|---|---|---|---|---|---|
| ≤0.10 | ≤0.35 | 0.30 -0.80 | ≤0.020 | ≤0.010 | ≤ ≥ | 8.50 -10.00 | ≤0.10 | ≤0.05 |
| 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) |
|---|---|---|---|---|---|---|
| 181 (≥) | 148 (≥) | 24 | 14 | 42 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 211 |
| 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 |
|---|---|---|---|---|---|---|---|
| 44 | - | - | 0.12 | - | |||
| 957 | 863 | - | 22.3 | 331 | - | ||
| 911 | - | 42 | 42.2 | 232 | 414 |
Heat treated : 1647°C - 1493°C
| NF EN 10028-4 | Flat products made of steels for pressure purposes - Part 4: Nickel alloy steels with specified low temperature properties | NF-EN-10028-4.pdf |
| NF EN 10222-3 | Steel forgings for pressure purposes - Part 3: Nickel steels with specified low temperature properties | NF-EN-10222-3.pdf |
| NF EN 10269 | Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties | NF-EN-10269.pdf |
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