What are the types of shipbuilding steel plates?

Shipbuilding steel plates refer to thin steel plates and thick steel plates produced with special structural steel for shipbuilding and used to manufacture the hull structure of ocean-going, coastal and inland watercraft. Structural steel for shipbuilding includes carbon steel and low alloy steel, and the end of the steel number is marked with C (ship). Carbon steels include 2C, 3C, 4C and 5C, and low-alloy steels include 12MnC, 16MnC, 15MnTiC, 14MnVTiReC and other steel grades. The thickness is 2.5-50 mm.

The general strength hull structure steel for ships is divided into 4 grades: A, B, D, E. The yield strength (not less than 235MPa) of these 4 grades of steel is the same as the tensile strength (400～520MPa), but the impact energy at different temperatures It's not the same.

Grade A, D, E, and F respectively represent the impact toughness that can be achieved at 0°, -20°, -40°, -60°.

High-strength hull structure steel for ships 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 Grade A32, D32, E32, F32 is not less than 315MPa, and the tensile strength is 440～570MPa.

The yield strength of Grade A36, D36, E36, and F36 is not less than 355MPa, and the tensile strength is 490～620MPa.

The yield strength of Grade A40, D40, E40, F40 is not less than 390MPa, and the tensile strength is 510～660MPa.