GB/T 700 U12758 Introduce
GB/T 700 U12758 carbon structural steel is a series of low-carbon steels that have been developed for a variety of industrial applications. Its goal is to provide a high grade of strength, improved weldability and formability, and better cost efficiency. GB/T 700 U12758s are typically used in applications such as bridges, roads, sailboats, and buildings.
Smelting temperature:1514°C - 1768°C
Application:Carbon structural steels
GB/T 700 U12758 Material Chemical Composition
The chemical composition of the GB/T 700 U12758 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.3500 |
| Sulfur (S) | - | 0.0400 |
| PhOsphorus (P) | - | 0.0400 |
| Manganese (Mn) | - | 1.5000 |
| Carbon (C) | - | 0.2000 |
GB/T 700 U12758 Material Mechanical Properties
GB/T 700 U12758 steel also has excellent mechanical properties. Its yield strength ranges from 215MPa to 275MPa. The tensile strength ranges from 330MPa to 380MPa. This steel also has a good elongation rate of 15%-20%. GB/T 700 U12758 steels are characterized by their ductility, allowing for good formability and weld-ability. GB/T 700 U12758 steel can also be cold-formed and bolted or welded with ease.
The mechanical properties of the GB/T 700 U12758 steel are as follows:
| YieldRp0.2 | ≤ 653 (MPa) |
| TeileRm | ≤ 843 (MPa) |
| ImpactKV/Ku | 14(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 411 |
GB/T 700 U12758 Material Thermal Properties
The thermal performance parameters of the GB/T 700 U12758 steel are as follows:
| Temperature (°C) | 33 | 422 | 524 |
| Modulus of elasticity (GPa) | - | 157 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 44 |
| Thermal conductivity (W/m·°C) | - | 24.3 | 41.2 |
| Specific thermal capacity (J/kg·°C) | - | 212 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.24 | - | - |
| Deity (kg/dm³) | - | - | 314 |
| Poisson’s coefficient, ν | - | - | 122 |
GB/T 700 U12758 Material Machining Technology
Machining is an important process in many industries, including the production of steel pieces. GB/T 700 U12758 steel is a well-known Chinese standard steel grade, and it has good properties for machining. In this article, we will take a look at the machining of GB/T 700 U12758 steel, including the types of cutting tools that are used, the machining processes that are involved, and the safety measures that should be taken to prevent accidents.