GB 713 12Mng Introduce
GB 713 12Mng is a special steel grade designed and manufactured by the China Iron and Steel Research Institute Group (CISRI). It is a medium carbon structural steel usually applied in boiler and pressure vessels. GB 713 12Mng is a kind of low alloy steel, which is characterized by high strength, good ductility and resistance to corrosion. It also has a low thermal expansion coefficient, good toughness and high hardness. This steel is also well known for its excellent welding performance and its convenience for machining.
Smelting temperature:1818°C - 1111°C
Application:Steel plate for boiler
GB 713 12Mng Material Mechanical Properties
The mechanical properties of the GB 713 12Mng steel are as follows:
| YieldRp0.2 | ≤ 731 (MPa) |
| TeileRm | ≤ 855 (MPa) |
| ImpactKV/Ku | 22(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 11% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 243 |
GB 713 12Mng Material Thermal Properties
The thermal performance parameters of the GB 713 12Mng steel are as follows:
| Temperature (°C) | 44 | 559 | 586 |
| Modulus of elasticity (GPa) | - | 814 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 21.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 433 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.41 | - | - |
| Deity (kg/dm³) | - | - | 141 |
| Poisson’s coefficient, ν | - | - | 432 |