Steel for exhaust valves
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.30 | 0.45 | ||
| Si | 2.75 | 3.25 | ||
| Mn | 0.80 | 1.30 | ||
| P | - | 0.030 | ||
| S | - | 0.030 | ||
| Cr | 18.0 | 20.0 | ||
| Ni | 7.50 | 8.50 | ||
| 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) |
|---|---|---|---|---|---|---|
| 233 (≥) | 827 (≥) | 14 | 42 | 32 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 414 |
| 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 |
|---|---|---|---|---|---|---|---|
| 635 (≥) | 717 (≥) | 44 | 23 | 34 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 213 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 196 | 366 | 417 |
We can customize the production of EV6 grade, contact us for the best solution.
–sales@specificsteel.com