Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels for internal combustion engines
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.48 | 0.58 | ||
| Si | - | 0.45 | ||
| Mn | 8.00 | 10.00 | ||
| P | - | 0.050 | ||
| S | - | 0.030 | ||
| Cr | 20.00 | 22.00 | ||
| Mo | - | - | ||
| Ni | 3.25 | 4.50 | ||
| Nb+Ta | 2.00 | 3.00 | ||
| N | 0.38 | 0.50 |
Heat-treatable steels, alloy steels and free-cutting steels -- Part 15: Valve steels 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) |
|---|---|---|---|---|---|---|
| 734 (≥) | 413 (≥) | 22 | 12 | 11 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 442 |
| 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 |
|---|---|---|---|---|---|---|---|
| 628 (≥) | 589 (≥) | 14 | 44 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 322 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 296 | 418 | 285 |
We can customize the production of X53CrMnNiNbN21-9 grade, contact us for the best solution.
–sales@specificsteel.com