GB/T 699 15Mn-E Introduce
GB/T 699 15Mn-E steel is a popular steel used in many industries. It has good mechanical properties, including yield strength, ultimate strength, and elongation, as well as good corrosion resistance. These properties, combined with its low cost and easy weldability, make it an attractive choice for many applications. It is commonly used in construction, automotive, and shipbuilding industries.
Smelting temperature:1968°C - 1178°C
Application:High quality carbon structural steel
GB/T 699 15Mn-E Material Mechanical Properties
The mechanical properties of the GB/T 699 15Mn-E steel are as follows:
| YieldRp0.2 | ≤ 778 (MPa) |
| TeileRm | ≤ 255 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 23% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 321 |
GB/T 699 15Mn-E Material Thermal Properties
The thermal performance parameters of the GB/T 699 15Mn-E steel are as follows:
| Temperature (°C) | 14 | 788 | 739 |
| Modulus of elasticity (GPa) | - | 927 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 33 |
| Thermal conductivity (W/m·°C) | - | 14.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 432 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 323 |
| Poisson’s coefficient, ν | - | - | 232 |
GB/T 699 15Mn-E Material Machining Technology
Machining of GB/T 699 15Mn-E steel requires a combination of multiple processes, such as turning, drilling, grinding, and welding. Heat treatment is also used to alter the physical and chemical properties of the steel. Each process offers advantages for specific components, and knowing which process is best for the job is essential for ensuring quality results.