Valve steels and alloys for internal combustion engines
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | - | 0.80 | ||
| Si | - | 0.50 | ||
| Mn | - | 1.00 | ||
| P | - | 0.015 | ||
| S | - | 0.015 | ||
| Cr | 14.00 | 17.00 | ||
| Ni | - | remaining | ||
| Mo | - | 0.50 | ||
| Fe | 5.00 | 9.00 | ||
| Al | 0.40 | 1.00 | ||
| Ti | 2.25 | 2.75 | ||
| Nb+Ta | 0.70 | 1.20 | ||
| Co | - | 1.00 | ||
| Cu | - | 0.50 |
Valve steels and alloys for internal combustion engines
| Proof strength Rp0.2 (MPa) |
Tensile strength Rm (MPa) |
Impact energy KV (J) |
Elongation at fracture A (%) |
Reduction in cross section on fracture Z (%) |
As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 929 (≥) | 654 (≥) | 32 | 12 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 441 |
| Property | Density kg/dm3 |
Temperature T °C/F |
Specific heat J / kgK |
Thermal conductivity W/mK |
Electric resistance µΩ·cm |
Modulus of elasticity kN/mm2 |
Expansion rate |
|---|---|---|---|---|---|---|---|
| 431 (≥) | 312 (≥) | 24 | 13 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 442 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 352 | 559 | 957 |
We can customize the production of NC15Fe7TA grade, contact us for the best solution.
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