Steel for exhaust valves
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.15 | 0.25 | ||
| Si | 0.70 | 1.00 | ||
| Mn | 1.00 | 1.50 | ||
| P | - | 0.045 | ||
| S | - | 0.030 | ||
| Cr | 20.0 | 22.0 | ||
| Ni | 10.5 | 12.5 | ||
| N | 0.15 | 0.20 |
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) |
|---|---|---|---|---|---|---|
| 686 (≥) | 175 (≥) | 32 | 31 | 13 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 424 |
| 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 |
|---|---|---|---|---|---|---|---|
| 561 (≥) | 673 (≥) | 34 | 21 | 41 | 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 |
|||||
| 976 | 424 | 388 |
We can customize the production of EV4 grade, contact us for the best solution.
–sales@specificsteel.com