Heat - resisting steel bars
| Elements | Min.（≥） | Max.（≤） | Similar | Remarks |
|---|---|---|---|---|
| C | 0.75 | 0.85 | ||
| Si | 1.75 | 2.25 | ||
| Mn | 0.20 | 0.60 | ||
| P | - | 0.03 | ||
| S | - | 0.03 | ||
| Cr | 19.00 | 20.50 | ||
| Ni | 1.15 | 1.65 | ||
| Mo | - | - | ||
| N | - | - | ||
| Cu | - | 0.30 |
Heat - resisting steel bars
| 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) |
|---|---|---|---|---|---|---|
| 653 (≥) | 472 (≥) | 22 | 11 | 21 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 434 |
| 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 |
|---|---|---|---|---|---|---|---|
| 118 (≥) | 564 (≥) | 13 | 12 | 33 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 321 | |
| Temp. °C/°F |
Creep strain limit (10000h) (Rp1,0) N/mm2 |
Creep rupture strength (10000h) (Rp1,0) N/mm2 |
|||||
| 967 | 944 | 933 |
We can customize the production of STR4 grade, contact us for the best solution.
–sales@specificsteel.com