GB/T 714 Q235qE Introduce
GB/T 714 Q235qE steel is a high-strength steel that is widely used in a variety of industries. It is composed primarily of iron and carbon, with trace amounts of other elements such as silicon, manganese, phosphorus, and sulfur. GB/T 714 Q235qE steel has excellent mechanical properties, including high tensile and yield strength, excellent corrosion resistance, and high temperature resistance.
Smelting temperature:1399°C - 1143°C
Application:Structural steel for bridge
GB/T 714 Q235qE Material Chemical Composition
The chemical composition of the GB/T 714 Q235qE steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.3500 |
| Sulfur (S) | - | 0.0100 |
| PhOsphorus (P) | - | 0.0200 |
| Nickel (Ni) | - | 0.3000 |
| Nitrogen (N) | - | 0.0120 |
| Manganese (Mn) | - | 1.4000 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | - | 0.3000 |
| Carbon (C) | - | 0.1700 |
| Aluminum (Al) | 0.0150 | - |
GB/T 714 Q235qE Material Mechanical Properties
The mechanical properties of the GB/T 714 Q235qE steel are as follows:
| YieldRp0.2 | ≤ 826 (MPa) |
| TeileRm | ≤ 276 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 42% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 212 |
GB/T 714 Q235qE Material Thermal Properties
The thermal performance parameters of the GB/T 714 Q235qE steel are as follows:
| Temperature (°C) | 22 | 893 | 941 |
| Modulus of elasticity (GPa) | - | 847 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 24 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 141 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.13 | - | - |
| Deity (kg/dm³) | - | - | 324 |
| Poisson’s coefficient, ν | - | - | 234 |