GB 24510 9Ni490 Introduce
GB 24510 provides several benefits to the shipbuilding industry in China. By providing clear technical requirements for hot-rolled steel sheets and strips, this standard helps ensure that the steel used in ships is of high quality and meets the necessary safety standards. This can help reduce the risk of accidents and improve the safety of ships and their crews.
Smelting temperature:1881°C - 1936°C
Application:9% Nickel steel plates for pressure vessels with specified low temperature properties
GB 24510 9Ni490 Material Chemical Composition
The chemical composition of the GB 24510 9Ni490 steel are as follows:
| Element | Min | Max |
|---|---|---|
| Vanadium (V) | - | 0.0500 |
| Silicon (Si) | - | 0.3500 |
| Sulfur (S) | - | 0.0100 |
| PhOsphorus (P) | - | 0.0150 |
| Nickel (Ni) | 8.5000 | 10.0000 |
| Molybdenum (Mo) | - | 0.1000 |
| Manganese (Mn) | 0.3000 | 0.8000 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | - | 0.2500 |
| Carbon (C) | - | 0.1000 |
GB 24510 9Ni490 Material Mechanical Properties
The chemical composition of GB 24510 9Ni490 steel ensures that it has the necessary strength, toughness, and ductility to withstand the harsh conditions encountered in marine environments. By specifying the allowable ranges for various elements, this standard helps ensure that the steel used in shipbuilding is of high quality and meets the necessary safety standards. In addition, the limits on sulfur and phosphorus content help prevent these harmful impurities from weakening the material, while the limits on other elements such as chromium and nickel can improve the steel's corrosion resistance.
The mechanical properties of the GB 24510 9Ni490 steel are as follows:
| YieldRp0.2 | ≤ 379 (MPa) |
| TeileRm | ≤ 684 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 11% |
| Reduction in cross section on fractureZ | 43% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 324 |
GB 24510 9Ni490 Material Thermal Properties
The thermal performance parameters of the GB 24510 9Ni490 steel are as follows:
| Temperature (°C) | 24 | 152 | 222 |
| Modulus of elasticity (GPa) | - | 733 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 11 |
| Thermal conductivity (W/m·°C) | - | 33.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 413 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.34 | - | - |
| Deity (kg/dm³) | - | - | 132 |
| Poisson’s coefficient, ν | - | - | 343 |
GB 24510 9Ni490 Material Machining Technology
The mechanical processing properties specified in GB 24510 9Ni490 are important because they affect how the steel can be fabricated and assembled into complex structures. Good machinability and formability make the steel easier to work with, while good weldability ensures that it can be joined without defects or failures.