This standard specifies the order content, dimensions, shape, weight and allowable deviations, technical requirements, test methods, inspection rules, packaging, markings and quality certificates of carbon structural steel and low-alloy structural steel hot-rolled thick steel plates and steel strips. . This standard is applicable to carbon structural steel and low-alloy structural steel hot-rolled thick steel plates with a thickness of 3 mm～400 mm, and hot-rolled steel strips with a thickness of 3 mm～25.4 mm.
