The structural steels used in the hull are classified as general strength structural steels and high strength structural steels according to their minimum yield points.The general strength structural steel according to the standards of China classification society is divided into four quality grades: A, B, C and D (namely CCSA, CCSB, CCSC and CCSD);The high strength structural steel of China classification society is three strength grades and four quality grades.
The production technology of shipbuilding steel sheet from high carbon single element, low carbon multi-element, to micro-alloying and composite micro-alloying.The development from low strength grade to high strength grade and ultra high strength grade requires good low temperature impact toughness and low brittle transition temperature of shipbuilding steel sheet, therefore, there are requirements for aluminum content and micro-alloying of high strength ship plate.
Marine Steel Plate are used in the cabin structures of cruise ships. The especially thin but wide plates are used for such applications to offer the best processing properties such as flatness and weldability. In contrast, high-strength, thermomechanically rolled shipbuilding plates are used in offshore applications. They are used for platform superstructures or for special ships in the oil and gas industry.
