GB/T 700 Q275D Introduce
GB/T 700 Q275D carbon structural steel is an excellent choice for a variety of engineering and construction applications due to its superior strength, formability and weldability. It is suitable for use in bridges, roads, ships and trains, and for equipment used in manufacturing, workshops, and other industrial applications. Its low cost makes it even more attractive, making it an economically viable option for many projects.
Smelting temperature:1938°C - 1736°C
Application:Carbon structural steels
GB/T 700 Q275D Material Chemical Composition
The chemical composition of the GB/T 700 Q275D steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.3500 |
| Sulfur (S) | - | 0.0350 |
| PhOsphorus (P) | - | 0.0340 |
| Manganese (Mn) | - | 1.5000 |
| Carbon (C) | - | 0.2400 |
GB/T 700 Q275D Material Mechanical Properties
Toughness of a material refers to its ability to absorb energy and deform without experiencing catastrophic failure. It is measured using a toughness test, which typically involves applying an impact force to a sample of material until it fails. Generally, the toughness of GB/T 700 Q275D steel can reach up to 3.2J.
The mechanical properties of the GB/T 700 Q275D steel are as follows:
| YieldRp0.2 | ≤ 996 (MPa) |
| TeileRm | ≤ 131 (MPa) |
| ImpactKV/Ku | 43(J) |
| ElongationA | 33% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 222 |
GB/T 700 Q275D Material Thermal Properties
The thermal performance parameters of the GB/T 700 Q275D steel are as follows:
| Temperature (°C) | 22 | 728 | 716 |
| Modulus of elasticity (GPa) | - | 952 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 134 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 112 |
| Poisson’s coefficient, ν | - | - | 443 |
GB/T 700 Q275D Material Machining Technology
The key to achieving good results when machining GB/T 700 Q275D steel is to use a combination of the right cutting tools, the appropriate machining processes, and the necessary safety measures. To ensure good results, it is important to use sharp cutting tools that are the right size for the job, and to use the appropriate speeds and feeds when machining. In addition, the right coolant should be used to ensure that the cutting tools do not overheat. Finally, appropriate safety procedures must be followed at all times to ensure that no accidents occur.