GB/T 1591 Q390E Introduce
The major advantages of GB/T 1591 are that it optimizes the classification of steel products, it simplifies the production and inspection process, and it ensures product quality. It also promotes the efficient use of resources and helps the industry reduce cost and waste. It enhances the consistency of the steel products and its fabrication processes, helping to improve overall competitiveness.
Smelting temperature:1996°C - 1779°C
Application:Low alloy high strength structural steel
GB/T 1591 Q390E Material Mechanical Properties
Fatigue strength is the measure of a material's ability to resist cyclic loading. GB/T 1591 Q390E steels are typically evaluated for their fatigue strength by performing tests on Weibull specimens. These tests measure the maximum stress that can be applied without failure.
The mechanical properties of the GB/T 1591 Q390E steel are as follows:
| YieldRp0.2 | ≤ 218 (MPa) |
| TeileRm | ≤ 815 (MPa) |
| ImpactKV/Ku | 31(J) |
| ElongationA | 14% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 344 |
GB/T 1591 Q390E Material Thermal Properties
The thermal performance parameters of the GB/T 1591 Q390E steel are as follows:
| Temperature (°C) | 24 | 772 | 767 |
| Modulus of elasticity (GPa) | - | 721 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 23 |
| Thermal conductivity (W/m·°C) | - | 14.3 | 23.2 |
| Specific thermal capacity (J/kg·°C) | - | 443 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 221 |
| Poisson’s coefficient, ν | - | - | 331 |
GB/T 1591 Q390E Material Machining Technology
GB/T 1591 Q390E has been widely used in the construction industry and has been used in various large-scale projects. The high tensile strength and yield strength of GB/T 1591 Q390Es are higher than that of conventional carbon steels. The low alloy and high strength of GB/T 1591 Q390Es can reduce the weight and extend the life of structures and reduce the cost of use. At the same time, the excellent properties of GB/T 1591 Q390E can make cars and containers lighter, which is beneficial for fuel saving and environmental protection.