Steel for exhaust valves
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.65 | 0.75 | ||
| Si | 0.45 | 0.85 | ||
| Mn | 5.50 | 7.00 | ||
| P | - | 0.050 | ||
| S | 0.025 | 0.065 | ||
| Cr | 20.0 | 22.0 | ||
| Ni | 1.40 | 1.90 | ||
| N | 0.18 | 0.28 |
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) |
|---|---|---|---|---|---|---|
| 778 (≥) | 228 (≥) | 14 | 21 | 32 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 223 |
| 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 |
|---|---|---|---|---|---|---|---|
| 449 (≥) | 653 (≥) | 41 | 22 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 441 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 446 | 264 | 448 |
We can customize the production of EVll grade, contact us for the best solution.
–sales@specificsteel.com