The ship plate is the structural steel for the hull. According to its minimum yield point, the strength level is divided into: general strength structural steel and high strength structural steel.
Ship plate refers to the hot-rolled steel plate produced in accordance with the requirements of the construction rules of the classification society for the manufacture of ship hull structures. The general-strength structural steel of the China Classification Society standard is divided into four quality grades: A, B, D, and E (ie CCSA, CCSB, CCSD, CCSE); the high-strength structural steel of the China Classification Society standard is three Strength levels, four quality levels.
The main classification society rules are:
China CCS
American ABS
Germany GL
French BV
Norway DNV
Japan NK
UK LR
Korea KR
Italian RINA
The general strength steel for hull structure is divided into four grades: A, B, D, and E. The yield strength (not less than 235N/mm^2) of these four grades of steel is the same as the tensile strength (400～520N/mm^2). , but the impact power at different temperatures is different.
High-strength hull structural steel is divided into strength grades according to its minimum yield strength, and each strength grade is divided into A, D, E, F4 grades 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. Impact toughness that can be achieved at -40°, -60°;
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. Impact toughness that can be achieved at -40°, -60°;
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. The impact toughness that can be achieved at -40° and -60°.
