Product Description
The general strength hull structure steel is divided into four grades A, B, D and e. the yield strength (not less than 235n / mm ^ 2) of these four grades is the same as the tensile strength (400-520n / mm ^ 2), but the impact energy at different temperatures is different;
According to the minimum yield strength of high-strength hull structure steel, each strength grade is divided into a, D, e and F4 according to its impact toughness.
The yield strength of A32, D32, E32 and F32 is not less than 315n / mm ^ 2, and the tensile strength is 440-570n / mm ^ 2. A, D, e and f respectively represent the impact toughness that can be achieved under 0 °, - 20 °, - 40 °, - 60 ° respectively;
The yield strength of A36, D36, E36 and f36 is not less than 355N / mm ^ 2, and the tensile strength is 490-620n / mm ^ 2. A, D, e and f respectively represent the impact toughness that can be achieved under the conditions of 0 °, - 20 °, - 40 °, - 60 ° respectively;
The yield strength of a40, D40, E40 and F40 is not less than 390n / mm ^ 2, and the tensile strength is 510-660n / mm ^ 2. A, D, e and f respectively represent the impact toughness that can be achieved under the conditions of 0 °, - 20 °, - 40 °, - 60 ° respectively.
Also,
High Strength Quenched and tempered steel for welding structure: A420, d420, E420, F420; a460, d460, E460, f460; A500, D500, E500, f500; a550, D550, e550, F550; A620, D620, E620, f620; a690, d690, e690, f690;
Steel for boiler and pressure vessel: 360a, 360b; 410a, 410b; 460A, 460B; 490A, 490B; 1cr0.5mo, 2.25Cr1Mo
Steel for mechanical structure: generally, the above steel can be selected;
Low temperature ductile steel: 0.5nia, 0.5nib, 1.5Ni, 3.5Ni, 5Ni, 9Ni;
Austenitic stainless steel: 00Cr18Ni10, 00cr18ni10n, 00Cr17Ni14Mo2, 00cr17ni13mo2n, 00cr19ni13mo3, 00cr19ni13mo3n, 0cr18ni11nb;
Duplex stainless steel: 00Cr22Ni5Mo3N, 00cr25ni6mo3cu, 00cr25ni7mo4n3.
Composite steel plate: it is suitable for container and cargo tank of chemical products transport ship;
Z-direction steel: Based on a certain grade of structural steel (called parent steel), the steel is specially treated (such as calcium treatment, vacuum degassing, argon stirring, etc.) and properly heat treated