1, according to the thickness of the classification: (1) sheet (2) in the plate (3) slabs (4) special plate 2, according to the production method of classification: (1) hot-rolled steel (2) cold-rolled steel sheet 3, according to the surface characteristics Category: (1) galvanized sheet (galvanized plate, galvanized sheet) (2) tin plate (3) composite plate (4) color coated steel 3. By Application: (1) steel bridge (2) boiler plate (3) shipbuilding steel plate (4) armor plate (5) automotive steel (6) Roof plate (7) Structural Steel (8) electrical steel (silicon) (9) of the spring plate (10) Other