Common grades of Shipbuilding steel plates are generally divided into general strength grades and high-strength grades. The following are the specific ones:
General Strength Grades
Grade A: It is the most basic general strength shipbuilding steel plate, with a yield strength of not less than 235N/mm² and a tensile strength of 400-520N/mm². It has good comprehensive performance and is suitable for general ship structures.
Grade B: Slightly better than Grade A in terms of impact resistance and other aspects. It also has a yield strength of not less than 235N/mm² and a tensile strength of 400-520N/mm², and is often used in the construction of ship hulls and decks.
Grade D: With better low-temperature impact performance, it can maintain good toughness at 0°C. The yield and tensile strengths are the same as those of Grades A and B, and it is suitable for ships sailing in colder sea areas or those with higher requirements for low-temperature performance.
Grade E: Exhibits excellent low-temperature toughness and can reach the required impact toughness at -40°C. The mechanical properties are similar to those of the previous grades, and it is mainly used in ships operating in extremely cold regions.
High-Strength Grades
AH32, DH32, EH32, FH32: The yield strength of these grades is not less than 315N/mm², and the tensile strength is 440-570N/mm². The "A", "D", "E", "F" in their names represent the impact toughness that can be achieved at 0°C, -20°C, -40°C, and -60°C respectively. They are widely used in the construction of large ships, container ships and other key parts that require high strength and good toughness.
AH36, DH36, EH36, FH36: The yield strength is not less than 355N/mm², and the tensile strength is 490-620N/mm². They have higher strength and better comprehensive performance than the 32-grade steel plates and are suitable for the manufacture of large and complex ship structures.
AH40, DH40, EH40, FH40: The yield strength is not less than 390N/mm², and the tensile strength is 510-660N/mm². These are high-strength shipbuilding steel plates with better strength and toughness, which are used in some high-performance ships and special marine engineering structures.
In addition, there are also some other grades such as A420, D420, E420, F420 which belong to high-strength quenched and tempered steels for welded structures.
Just like you, 70% customers choose long-term cooperation with BBN steel not only for our good product and service quality, good reputation in the international market, but also for our experienced one-stop raw material supply and further steel processing!
