Ferrous Metals
Ferrous metals include ordinary carbon structural steel, high-quality carbon steel, alloy structural steel, carbon tool steel, stainless steel, electrical silicon steel, and others.
For rolled steel plates with a thickness of less than 4 mm, relevant national standards classify thickness precision into three grades: A (high precision), B (higher precision), and C (ordinary precision).
For high-quality carbon structural cold-rolled thin steel sheets, relevant national standards classify surface quality into four groups: I (extra-high-grade finish), II (high-grade finish), III (higher-grade finish), and IV (ordinary-grade finish). Each group is further subdivided into three grades based on drawing capability: Z (extra-deep drawing), S (deep drawing), and P (ordinary drawing).
Non-ferrous Metals
Non-ferrous metals include copper and copper alloys, aluminum and aluminum alloys, magnesium alloys, titanium alloys, and others.