ABS Rules Part 2 — ABS Marine Structural Steel Specifications
Grades
普通强度: A, B, D, E, CS; 高强度: AH32, DH32, EH32, FH32, AH36, DH36, EH36, FH36, AH40, DH40, EH40, FH40
Chemical composition and mechanical properties
| Grade | Chemical composition | Mechanical properties |
|---|---|---|
| D | C≤0.21, Mn≥0.60(>25mm), P≤0.035, S≤0.035 | Rm 400-520 MPa, Rp0.2 ≥235 MPa, A≥22%, quenching and tempering |
| E | C≤0.18, Mn≥0.70, P≤0.035, S≤0.035, Al≥0.015 | Rm 400-520 MPa, Rp0.2 ≥235 MPa, A≥22%, Akv≥27J at -40℃, quenching and tempering |
| CS | C≤0.18, Mn≥0.60, P≤0.035, S≤0.035 | Rm 400-520 MPa, Rp0.2 ≥235 MPa, A≥22% |
Application scope
ABS Rules Part 2 is the American Bureau of Shipping's shipbuilding specifications, which stipulate the requirements for structural steel plates used in ships. The grades include ordinary strength A, B, D, E, CS, and high strength AH to FH. The specifications specify requirements for composition, tensile strength, and low-temperature impact resistance, emphasizing good weldability and low-temperature toughness. Delivery must be approved by the relevant classification society or system, and the rules apply to the load-bearing structures of hulls.
Typical applications
Widely used in the hull structure, deck, bottom, and sides of ABS-classed vessels, as well as in marine engineering structures and ship frames. Standard strength grades are used for conventional hulls, high-strength grades for high-stress and weight-reduction areas, and CS grades for areas requiring crack arrest. With good weldability and low-temperature toughness, it is suitable for welded ship and marine engineering structures.
