Valve steels and alloys for internal combustion engines
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.50 | 0.60 | ||
| Si | - | 0.25 | ||
| Mn | 7.00 | 10.00 | ||
| P | - | 0.035 | ||
| S | - | 0.030 | ||
| Cr | 19.50 | 21.50 | ||
| Ni | 1.50 | 2.75 | ||
| Mo | - | - | ||
| N | 0.20 | 0.40 |
Valve steels and alloys for internal combustion engines
| 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) |
|---|---|---|---|---|---|---|
| 475 (≥) | 393 (≥) | 11 | 33 | 44 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 432 |
| 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 |
|---|---|---|---|---|---|---|---|
| 757 (≥) | 729 (≥) | 12 | 13 | 12 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 412 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 255 | 468 | 991 |
We can customize the production of X55CrMnNiN20-8 grade, contact us for the best solution.
–sales@specificsteel.com