Valve steel bars for internal combustion engines - Technical requirements
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.35 | 0.50 | ||
| Si | 2.00 | 3.00 | ||
| Mn | - | 0.70 | ||
| P | - | 0.035 | ||
| S | - | 0.030 | ||
| Ni | - | 0.60 | ||
| Cr | 8.00 | 10.00 |
4Cr9Si2
| 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) |
|---|---|---|---|---|---|---|
| 183 (≥) | 686 (≥) | 42 | 21 | 33 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 331 |
| 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 |
|---|---|---|---|---|---|---|---|
| 237 (≥) | 918 (≥) | 14 | 12 | 21 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 443 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 672 | 267 | 282 |
We can customize the production of 4Cr9Si2 grade, contact us for the best solution.
–sales@specificsteel.com