GB 1591 18Nb Introduce
One of the main mechanical properties of GB 1591 18Nb steel is its shape and ductility. Ductility refers to the material's ability to deform plastically under stress without fracturing. GB 1591 18Nb is notable for its high ductility, allowing it to be formed into various shapes. This makes it a popular choice for construction projects, as it can be easily bent and molded while still maintaining its strength and durability.
Smelting temperature:1919°C - 1299°C
Application:Low alloy high strength structural steel
GB 1591 18Nb Material Mechanical Properties
The mechanical properties of the GB 1591 18Nb steel are as follows:
| YieldRp0.2 | ≤ 127 (MPa) |
| TeileRm | ≤ 722 (MPa) |
| ImpactKV/Ku | 13(J) |
| ElongationA | 23% |
| Reduction in cross section on fractureZ | 31% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 333 |
GB 1591 18Nb Material Thermal Properties
The thermal performance parameters of the GB 1591 18Nb steel are as follows:
| Temperature (°C) | 32 | 982 | 385 |
| Modulus of elasticity (GPa) | - | 287 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 44 |
| Thermal conductivity (W/m·°C) | - | 23.3 | 43.2 |
| Specific thermal capacity (J/kg·°C) | - | 211 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.14 | - | - |
| Deity (kg/dm³) | - | - | 424 |
| Poisson’s coefficient, ν | - | - | 423 |
GB 1591 18Nb Material Machining Technology
When machining GB 1591 18Nb steel, the right tools and techniques are essential for producing acceptable results. To start, selecting a suitable cutting tool is important. High-speed steel (HSS) tools are generally used for machining GB 1591 18Nb steel; however, carbide and cermet (ceramic-metal composite) tools are also available and are more suitable for harder materials. It is also critical to select the correct tool geometry for the operation being performed, as this will determine the cutting force and tool life.