GB/T 714 Q235qD Introduce
GB/T 714 Q235qD Steel is a metal alloy composed primarily of iron, carbon, and other elements such as manganese, phosphorus, sulfur, and silicon. Steel has a broad range of applications, from construction to machine parts, due to its strength, durability, and ability to be formed into various shapes and sizes.
Smelting temperature:1796°C - 1276°C
Application:Structural steel for bridge
GB/T 714 Q235qD Material Chemical Composition
The chemical composition of the GB/T 714 Q235qD steel are as follows:
| Element | Min | Max |
|---|---|---|
| Carbon (C) | - | 0.1800 |
| Silicon (Si) | - | 0.3000 |
| Manganese (Mn) | 0.5000 | 0.8000 |
| Sulfur (S) | - | 0.0250 |
| PhOsphorus (P) | - | 0.0250 |
| Silicon (Si) | - | 0.3500 |
| 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 Q235qD Material Mechanical Properties
The mechanical properties of the GB/T 714 Q235qD steel are as follows:
| YieldRp0.2 | ≤ 961 (MPa) |
| TeileRm | ≤ 661 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 21% |
| Reduction in cross section on fractureZ | 31% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 234 |
GB/T 714 Q235qD Material Thermal Properties
The thermal performance parameters of the GB/T 714 Q235qD steel are as follows:
| Temperature (°C) | 24 | 254 | 379 |
| Modulus of elasticity (GPa) | - | 384 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 11.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 432 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 223 |
| Poisson’s coefficient, ν | - | - | 342 |