GB/T 700 Q215B Introduce
The main characteristics of GB/T 700 Q215B carbon structural steel are its high strength, good ductility, and low cost. It has a high tensile strength of up to 745 Mpa, making it a good choice for structural applications where a large load-bearing capacity is needed. It has good weldability, allowing for easy fabrication of steel components, and it exhibits good formability which allows for easy assembly and shaping of parts. Its low cost is attributed to its large circulation in the Chinese market.
Smelting temperature:1687°C - 1764°C
Application:Carbon structural steels
GB/T 700 Q215B Material Chemical Composition
The chemical composition of the GB/T 700 Q215B steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 0.3500 |
| Sulfur (S) | - | 0.0500 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | - | 0.3000 |
| Manganese (Mn) | - | 1.4000 |
| Carbon (C) | - | 0.2200 |
| Silicon (Si) | - | 0.3000 |
| Sulfur (S) | - | 0.0450 |
| Manganese (Mn) | 0.3000 | 0.6500 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | - | 0.3000 |
| Carbon (C) | 0.1400 | 0.2200 |
GB/T 700 Q215B Material Mechanical Properties
The tensile strength of GB/T 700 Q215B steel is the amount of force that must be applied to it before it starts to break. It is measured using a tensile strength test, which typically involves applying a longitudinal tensile stress to a sample of material until it breaks. Generally, the tensile strength of GB/T 700 Q215B steel can reach up to 400MPa.
The mechanical properties of the GB/T 700 Q215B steel are as follows:
| YieldRp0.2 | ≤ 446 (MPa) |
| TeileRm | ≤ 475 (MPa) |
| ImpactKV/Ku | 42(J) |
| ElongationA | 22% |
| Reduction in cross section on fractureZ | 23% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 241 |
GB/T 700 Q215B Material Thermal Properties
The thermal performance parameters of the GB/T 700 Q215B steel are as follows:
| Temperature (°C) | 21 | 792 | 932 |
| Modulus of elasticity (GPa) | - | 511 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 12 |
| Thermal conductivity (W/m·°C) | - | 21.3 | 42.2 |
| Specific thermal capacity (J/kg·°C) | - | 414 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.33 | - | - |
| Deity (kg/dm³) | - | - | 411 |
| Poisson’s coefficient, ν | - | - | 313 |
GB/T 700 Q215B Material Machining Technology
The types of cutting tools that are used to machine GB/T 700 Q215B steel will depend on the type of machining that is being done. Generally, the typical cutting tools that are used include twist drills, reamers, taps, and milling cutters, which can be made of high-speed steel, carbide, or cobalt. Another type of cutting tool that is often used for machining GB/T 700 Q215B steel is a side milling cutter.