GB/T 16270 Q620E Introduce
GB/T 16270 Q620E steel is made of iron combined with other elements, including carbon, chromium, manganese, and vanadium. Each of these elements adds unique properties to the steel, allowing it to meet the performance requirements of different applications.
Smelting temperature:1984°C - 1416°C
Application:Quenched and tempered steel plate for high strength structure
GB/T 16270 Q620E Material Mechanical Properties
The mechanical properties of the GB/T 16270 Q620E steel are as follows:
| YieldRp0.2 | ≤ 156 (MPa) |
| TeileRm | ≤ 838 (MPa) |
| ImpactKV/Ku | 32(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 33% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 113 |
GB/T 16270 Q620E Material Thermal Properties
The thermal performance parameters of the GB/T 16270 Q620E steel are as follows:
| Temperature (°C) | 31 | 721 | 352 |
| Modulus of elasticity (GPa) | - | 311 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 14.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 323 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 232 |
| Poisson’s coefficient, ν | - | - | 223 |
GB/T 16270 Q620E Material Machining Technology
The machinability of GB/T 16270 Q620E steel is determined by its hardness, which is in the range of bracket 1.5 to 2.5, making it one of the most difficult steels to machine. The high strength of the steel requires a lot of cutting force to be exerted during machining operations. The hardness of the steel also makes it prone to built up edge formation, making it difficult to avoid tool wear and wear-induced surface damage.