GB 1591 12Mn Introduce
GB 1591 12Mn, or the Chinese Standard of hot-rolled steel, is a widely used material for construction and engineering purposes. With its high strength, hardness, and ductility, GB 1591 12Mn steel is used in a variety of structures, from buildings to bridges. As such, it's important to understand the mechanical properties of this steel in order to create durable and reliable structures.
Smelting temperature:1538°C - 1647°C
Application:Low alloy high strength structural steel
GB 1591 12Mn Material Mechanical Properties
The mechanical properties of the GB 1591 12Mn steel are as follows:
| YieldRp0.2 | ≤ 712 (MPa) |
| TeileRm | ≤ 352 (MPa) |
| ImpactKV/Ku | 31(J) |
| ElongationA | 44% |
| Reduction in cross section on fractureZ | 24% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 232 |
GB 1591 12Mn Material Thermal Properties
The thermal performance parameters of the GB 1591 12Mn steel are as follows:
| Temperature (°C) | 41 | 773 | 182 |
| Modulus of elasticity (GPa) | - | 998 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 24 |
| Thermal conductivity (W/m·°C) | - | 41.3 | 24.2 |
| Specific thermal capacity (J/kg·°C) | - | 131 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.43 | - | - |
| Deity (kg/dm³) | - | - | 312 |
| Poisson’s coefficient, ν | - | - | 111 |
GB 1591 12Mn Material Machining Technology
GB 1591 12Mn is a high-quality boron steel that is used for a wide range of applications requiring strength and weldability. It is a low-carbon steel alloy with a high content of boron, an element that is added to the alloy to improve the mechanical properties. The most common grade of GB 1591 12Mn steel is 50B, which is widely used for automotive structural parts, agricultural and mining machinery parts, construction machinery parts, and other components requiring strength and weldability. It is also used to manufacture machine tool components, and as a result, is frequently encountered in machining operations.