Valve steels and alloys for internal combustion engines
Elements | Min.(≥) | Max.(≤) | Similar | Remarks |
---|---|---|---|---|
C | 0.04 | 0.10 | ||
Si | - | 1.00 | ||
Mn | - | 1.00 | ||
P | - | 0.020 | ||
S | - | 0.015 | ||
Cr | 18.00 | 21.00 | ||
Ni | - | remaining | ||
Mo | - | - | ||
Al | 1.00 | 1.80 | ||
Ti | 1.80 | 2.70 | ||
Fe | - | 3.00 | ||
Co | - | 2.00 | ||
Cu | - | 0.20 | ||
B | - | 0.0080 |
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) |
---|---|---|---|---|---|---|
612 (≥) | 613 (≥) | 33 | 34 | 42 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 432 |
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 |
---|---|---|---|---|---|---|---|
318 (≥) | 217 (≥) | 33 | 13 | 33 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 311 | |
Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
677 | 414 | 181 |
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