GB/T 1299 T30000 Introduce
GB/T 1299 T30000 steel is a commercial steel alloy with a wide range of applications. Its elemental composition is easily tailored to meet the needs of different applications, with the amount of each element being carefully monitored to ensure that the final product is suitable for its intended use. The various elements included in the alloy all serve a specific purpose, whether it be increased strength, improved heat resistance, or enhanced corrosion resistance.
Smelting temperature:1981°C - 1914°C
Application:Alloy tool steel
GB/T 1299 T30000 Material Chemical Composition
The chemical composition of the GB/T 1299 T30000 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | 0.3000 | 0.6000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | - | 0.2000 |
| Manganese (Mn) | 0.8000 | 1.1000 |
| Copper (Cu) | - | 0.3000 |
| Chromium (Cr) | - | 0.2500 |
| Cobalt (Co) | - | 1.0000 |
| Carbon (C) | 0.7500 | 0.8500 |
GB/T 1299 T30000 Material Mechanical Properties
GB/T 1299 T30000 steel has many desirable mechanical properties which make it an ideal material for construction. It has a yield strength of 390-600 MPa and tensile strength of 540-780 MPa, which makes it an exceptionally strong and durable material. Moreover, it has an elongation of 22-42%, a reduction in area of 40-50%, and an impact energy of 27-36 J at room temperature, making it highly resistant to deformation. Furthermore, it has good weldability, making it perfect for complex constructions.
The mechanical properties of the GB/T 1299 T30000 steel are as follows:
| YieldRp0.2 | ≤ 325 (MPa) |
| TeileRm | ≤ 629 (MPa) |
| ImpactKV/Ku | 24(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 21% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 411 |
GB/T 1299 T30000 Material Thermal Properties
The thermal performance parameters of the GB/T 1299 T30000 steel are as follows:
| Temperature (°C) | 11 | 349 | 529 |
| Modulus of elasticity (GPa) | - | 551 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 43 |
| Thermal conductivity (W/m·°C) | - | 24.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 122 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 223 |
| Poisson’s coefficient, ν | - | - | 143 |