Steel for exhaust valves
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.48 | 0.58 | ||
| Si | - | 0.25 | ||
| Mn | 8.00 | 10.0 | ||
| P | - | 0.050 | ||
| S | - | 0.035 | ||
| Cr | 20.0 | 23.0 | ||
| Ni | 3.25 | 4.50 | ||
| N | 0.38 | 0.55 |
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) |
|---|---|---|---|---|---|---|
| 853 (≥) | 557 (≥) | 11 | 41 | 22 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 213 |
| 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 |
|---|---|---|---|---|---|---|---|
| 989 (≥) | 163 (≥) | 41 | 34 | 32 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 133 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 511 | 432 | 989 |
We can customize the production of EV8 grade, contact us for the best solution.
–sales@specificsteel.com