DIN SEW 090-2 S770QL Introduce
The chemical composition of DIN SEW 090-2 S770QL steel consists primarily of iron. The other alloying elements present in the steel are chromium, nickel, molybdenum, copper, and vanadium, with each contributing certain levels of strength and wear resistance. The chemical makeup of the steel determines the properties of the material and its ability to perform in certain environments.
Smelting temperature:1447°C - 1911°C
Application:High tenacity quenched and tempered fine grain steel. Part 2: Technical delivery conditions for tube and hollow sections
DIN SEW 090-2 S770QL Material Mechanical Properties
The mechanical properties of the DIN SEW 090-2 S770QL steel are as follows:
| YieldRp0.2 | ≤ 199 (MPa) |
| TeileRm | ≤ 467 (MPa) |
| ImpactKV/Ku | 22(J) |
| ElongationA | 21% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 232 |
DIN SEW 090-2 S770QL Material Thermal Properties
The thermal performance parameters of the DIN SEW 090-2 S770QL steel are as follows:
| Temperature (°C) | 43 | 239 | 263 |
| Modulus of elasticity (GPa) | - | 519 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 14 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 434 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 122 |
| Poisson’s coefficient, ν | - | - | 312 |