Steel for intake valves
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.35 | 0.45 | ||
| Si | 3.60 | 4.20 | ||
| Mn | 0.20 | 0.40 | ||
| P | - | 0.030 | ||
| S | - | 0.04 | ||
| Cr | 1.85 | 2.50 | ||
| Ni | - | 0.10 | ||
| Mo | - | O.25 | ||
| Cu | - | 0.25 |
Steel for intake 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) |
|---|---|---|---|---|---|---|
| 884 (≥) | 369 (≥) | 24 | 32 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 443 |
| 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 |
|---|---|---|---|---|---|---|---|
| 155 (≥) | 179 (≥) | 23 | 41 | 23 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 112 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 839 | 393 | 847 |
We can customize the production of NV8 grade, contact us for the best solution.
–sales@specificsteel.com