GB/T 699 U20152 Introduce
The hardness of GB/T 699 U20152 is usually measured by the Brinell Hardness Test. This test measures the resistance of the steel to surface indentations made by a small steel ball. GB/T 699 U20152 has a Brinell Hardness of approximately 180-240 HBW. In terms of strength, GB/T 699 U20152 has a tensile strength of approximately 420-520MPa, making it one of the strongest steel alloys available. This high strength and hardness makes it suitable for a wide range of applications, including precision machining, engineering tools, and automobiles.
Smelting temperature:1786°C - 1994°C
Application:High quality carbon structural steel
GB/T 699 U20152 Material Mechanical Properties
The mechanical properties of the GB/T 699 U20152 steel are as follows:
| YieldRp0.2 | ≤ 626 (MPa) |
| TeileRm | ≤ 491 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 44% |
| Reduction in cross section on fractureZ | 12% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 342 |
GB/T 699 U20152 Material Thermal Properties
The thermal performance parameters of the GB/T 699 U20152 steel are as follows:
| Temperature (°C) | 43 | 454 | 271 |
| Modulus of elasticity (GPa) | - | 979 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 34 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 113 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 113 |
| Poisson’s coefficient, ν | - | - | 121 |
GB/T 699 U20152 Material Machining Technology
Machining of GB/T 699 U20152 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.