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Chemical and mechanical properties of AB/A grade spiral steel pipes
1、 Chemical composition
The chemical composition of AB/A spiral steel pipes is based on classification society certification standards, as follows:
Carbon (C): ≤ 0.21%；
Manganese (Mn): ≥ 2.50% (strengthening strength);
Silicon (Si): ≤ 0.50%；
Phosphorus (P): ≤ 0.035% (low impurity control for cold brittleness);
Sulfur (S): ≤ 0.035% (reduces the risk of thermal brittleness).
2、 Mechanical performance
Intensity index:
Yield strength (σ s): ≥ 235 MPa；
Tensile strength (σ b): 400~520 MPa.
Plasticity index:
Elongation rate (δ): ≥ 22% (elongation at break).
3、 Application Fields
AB/A spiral steel pipe is suitable for the following scenarios due to its balanced strength and plasticity:
Ship and Ocean Engineering: Hull Structure, Marine Platform Welding Components;
Infrastructure and Industry: Medium and Low Pressure Fluid Transport Pipelines, Mechanical Component Connections.
4、 Production and Standards
Execution standard: Complies with the certification requirements of the American Bureau of Shipping (ABS);
Welding performance: Supports conventional welding processes (arc welding, submerged arc welding), and the weld strength needs to match the base metal.
(Note: Specific performance parameters need to be adjusted based on the thickness range and actual working conditions)
ADD：Chengnan Industrial Development Zone, Yanshan County, Hebei Province
Domestic phone number：0086-317-6689999
International call：0086-317-6165555
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