France AFNOR NF EN 10090, 2.4955 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 | 2.4955 | AFNOR | France | Valve steels and alloys for internal combustion engines |
C | Si | Mn | P | S | Cr | Ni | Mo | Al | Ti | Fe | B | Nb+Ta |
---|---|---|---|---|---|---|---|---|---|---|---|---|
0.04 -0.10 | ≤1.00 | ≤1.00 | ≤0.030 | ≤0.015 | 18.00 -21.00 | ≤remaining | ≤ ≥ | 0.30 -1.00 | 1.00 -2.00 | 23.00 -28.00 | ≤0.008 | 1.00 -2.00 |
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) |
---|---|---|---|---|---|---|
254 (≥) | 395 (≥) | 22 | 33 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 333 |
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 |
---|---|---|---|---|---|---|---|
34 | - | - | 0.12 | - | |||
559 | 614 | - | 22.3 | 314 | - | ||
319 | - | 43 | 11.2 | 213 | 443 |
Heat treated : 1832°C - 1346°C
Grade | Standard | Country | Application |
---|---|---|---|
NiFe25Cr20NbTi | |||
NiFe25Cr20NbTi | |||
NiFe25Cr20NbTi |
NF EN 10090 | Valve steels and alloys for internal combustion engines | NF-EN-10090.pdf |
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