GB 24510 9Ni590B Introduce
GB 24510 is an important standard for the shipbuilding industry in China. By specifying the technical requirements for hot-rolled steel sheets and strips for hull structures, this standard helps ensure that ships are built with high-quality materials that meet the necessary safety standards. It also provides clarity and consistency across the industry, which can benefit both manufacturers and customers. GB 24510 plays an important role in ensuring the safety and reliability of ships and other marine structures.
Smelting temperature:1129°C - 1794°C
Application:9% Nickel steel plates for pressure vessels with specified low temperature properties
GB 24510 9Ni590B Material Chemical Composition
The chemical composition of the GB 24510 9Ni590B steel are as follows:
| Element | Min | Max |
|---|---|---|
| Molybdenum (Mo) | - | 0.1000 |
| Vanadium (V) | - | 0.0100 |
| Copper (Cu) | - | 0.3500 |
| Chromium (Cr) | - | 0.2500 |
| Nickel (Ni) | 8.5000 | 10.0000 |
| Sulfur (S) | - | 0.0050 |
| PhOsphorus (P) | - | 0.0100 |
| Manganese (Mn) | 0.3000 | 0.8000 |
| Silicon (Si) | - | 0.3500 |
| Carbon (C) | - | 0.1000 |
GB 24510 9Ni590B Material Mechanical Properties
The mechanical properties of GB 24510 9Ni590B steel are specified in the standard and include the following:
Yield Strength: The minimum yield strength for GB 24510 9Ni590B steel should be no less than 235 MPa. Yield strength is the stress at which a material begins to deform plastically, or permanently, under load.
Tensile Strength: The minimum tensile strength for GB 24510 9Ni590B steel should be between 400 - 520 MPa. Tensile strength is the maximum stress that a material can withstand before breaking or fracturing under tension.
Elongation: The minimum elongation of GB 24510 9Ni590B steel should be no less than 22%. Elongation measures the amount of deformation a material undergoes before breaking under tension and is expressed as a percentage.
Impact Toughness: The minimum impact toughness of GB 24510 9Ni590B steel should be no less than 34 Joules at room temperature. Impact toughness is a measure of a material's ability to absorb energy under impact loading and resist brittle fracture.
Other Properties: GB 24510 9Ni590B also specifies other mechanical properties such as bendability, flattening, and surface quality.
The mechanical properties of the GB 24510 9Ni590B steel are as follows:
| YieldRp0.2 | ≤ 575 (MPa) |
| TeileRm | ≤ 437 (MPa) |
| ImpactKV/Ku | 11(J) |
| ElongationA | 31% |
| Reduction in cross section on fractureZ | 41% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 414 |
GB 24510 9Ni590B Material Thermal Properties
The thermal performance parameters of the GB 24510 9Ni590B steel are as follows:
| Temperature (°C) | 41 | 225 | 194 |
| Modulus of elasticity (GPa) | - | 242 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 13 |
| Thermal conductivity (W/m·°C) | - | 43.3 | 34.2 |
| Specific thermal capacity (J/kg·°C) | - | 341 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 134 |
| Poisson’s coefficient, ν | - | - | 134 |
GB 24510 9Ni590B Material Machining Technology
Machinability: Machinability refers to the ease with which a material can be cut, drilled, or shaped using machine tools. The machinability of GB 24510 9Ni590B steel is not specified by the standard, but it is generally considered to have good machinability due to its low carbon content.