The steel plate with pattern is supplied according to the specifications of GB/T700 (Carbon Structural Steel), GB/T712 (Structural Steel for Ship Hulls), and GB/T4171 (High Corrosion-Resistant Structural Steel). It is rolled from Grade B carbon structural steel, and its chemical composition conforms to the requirements of GB700 "Technical Conditions for Common Carbon Structural Steel". Due to the continuous expansion of domestic construction demand, the production of the three types of structural steel specified above is increasing at a rate of 10%-15% annually.