GB/T 700 U12155 Introduce
The GB/T 700 standard stipulates the grade and classification of carbon and steels and precisely defines their chemical composition, mechanical performance, and physical properties. Moreover, it establishes unified standards for physical and mechanical properties, including strength, extension, toughness, expansion, bending and other aspects related to quality control of steel.
Smelting temperature:1961°C - 1973°C
Application:Carbon structural steels
GB/T 700 U12155 Material Chemical Composition
The chemical composition of the GB/T 700 U12155 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Sulfur (S) | - | 0.0450 |
| PhOsphorus (P) | - | 0.0450 |
| Manganese (Mn) | - | 1.2000 |
| Silicon (Si) | - | 0.3500 |
| Carbon (C) | - | 0.1500 |
GB/T 700 U12155 Material Mechanical Properties
GB/T 700 U12155 steel is an all-round steel used for various metal constructions in China. It has excellent mechanical properties, including yield strength, tensile strength, toughness, elongation, and even overall ductility.
The mechanical properties of the GB/T 700 U12155 steel are as follows:
| YieldRp0.2 | ≤ 845 (MPa) |
| TeileRm | ≤ 154 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 22% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 211 |
GB/T 700 U12155 Material Thermal Properties
The thermal performance parameters of the GB/T 700 U12155 steel are as follows:
| Temperature (°C) | 12 | 115 | 578 |
| Modulus of elasticity (GPa) | - | 699 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 41.3 | 44.2 |
| Specific thermal capacity (J/kg·°C) | - | 231 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.21 | - | - |
| Deity (kg/dm³) | - | - | 423 |
| Poisson’s coefficient, ν | - | - | 212 |
GB/T 700 U12155 Material Machining Technology
The types of cutting tools that are used to machine GB/T 700 U12155 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 U12155 steel is a side milling cutter.