Steel for exhaust valves
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.03 | 0.06 | ||
| Si | - | 0.20 | ||
| Mn | - | 0.20 | ||
| P | - | 0.015 | ||
| S | - | 0.015 | ||
| Cr | 22.3 | 22.9 | ||
| Ni | 55.0 | 58.0 | ||
| Mo | 1.70 | 2.30 |
Steel for exhaust valves
| 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) |
|---|---|---|---|---|---|---|
| 168 (≥) | 397 (≥) | 34 | 24 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 314 |
| 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 |
|---|---|---|---|---|---|---|---|
| 271 (≥) | 777 (≥) | 41 | 41 | 12 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 314 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 834 | 567 | 537 |
We can customize the production of HEV8 grade, contact us for the best solution.
–sales@specificsteel.com