GB/T 714 Q390qE Introduce
GB/T 714 Q390qE 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:1298°C - 1281°C
Application:Structural steel for bridge
GB/T 714 Q390qE Material Chemical Composition
The chemical composition of the GB/T 714 Q390qE steel are as follows:
| Element | Min | Max |
|---|---|---|
| PhOsphorus (P) | - | 0.0200 |
| Sulfur (S) | - | 0.0150 |
| Manganese (Mn) | 1.2000 | 1.6000 |
| Silicon (Si) | - | 0.5000 |
| Carbon (C) | - | 0.1700 |
GB/T 714 Q390qE Material Mechanical Properties
The mechanical properties of the GB/T 714 Q390qE steel are as follows:
| YieldRp0.2 | ≤ 958 (MPa) |
| TeileRm | ≤ 955 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 24% |
| Reduction in cross section on fractureZ | 11% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 313 |
GB/T 714 Q390qE Material Thermal Properties
The thermal performance parameters of the GB/T 714 Q390qE steel are as follows:
| Temperature (°C) | 44 | 142 | 683 |
| Modulus of elasticity (GPa) | - | 526 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 41.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 111 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.42 | - | - |
| Deity (kg/dm³) | - | - | 232 |
| Poisson’s coefficient, ν | - | - | 124 |