S355 marine steel plate refers to the hot-rolled steel plate used to manufacture the hull structure produced in accordance with the requirements of the classification society.
S355 marine steel plate refers to the steel used to manufacture the hull structure of sea-going ships and inland ships, usually high-quality carbon steel and high-quality low-alloy steel. S355 marine steel plates require certain strength, toughness, low temperature resistance and corrosion resistance, and require better welding performance.
General strength hull structure steel is divided into 4 grades: A, B, D, E. The yield strength (not less than 235N/mm^2) and tensile strength (400～520N/mm^2) of these 4 grades of steel The same, but the impact energy is different at different temperatures.
S355 marine steel plate is required to have higher strength, good corrosion resistance, welding performance, processing and forming performance and surface quality. In order to ensure quality and ensure sufficient toughness, the Mn/C of the chemical composition of the S355 marine steel plate is required to be above 2.5, and the carbon equivalent is also strictly required, and it is produced by a steel plant approved by the ship inspection department.
