One: steel. According to the section shape, it is divided into round steel, flat steel, square steel, hexagonal steel, octagonal steel, angle steel, I-beam, channel steel, T-beam, B- beam, etc.

Two: steel plate! According to the thickness, it is divided into thick steel plate (thickness) and thin steel plate (thickness) "according to the purpose, it is divided into general steel plate, boiler steel plate, shipbuilding steel plate, automobile thick steel plate, general steel plate, roof thin steel plate, pickling steel plate, Galvanized thin steel plate, tin-plated thin steel plate and other special steel plates, etc.

Three: steel strip according to the delivery status of hot-rolled steel strip and cold-rolled steel strip.

Four: steel pipe! According to the manufacturing method, seamless steel pipes (hot rolling and cold drawing) and welded steel pipes are divided into general steel pipes, water gas steel pipes, boiler steel pipes, petroleum steel pipes and other special copper pipes, etc.# according to the surface condition, galvanized steel pipes and non-galvanized steel pipes are divided into threaded steel pipes and non-threaded steel pipes according to the pipe end structure.

Five: steel wire! According to the processing method, it is divided into cold drawn steel wire and cold rolled steel wire, etc. "according to the purpose, it is divided into general steel wire, binding steel wire, overhead communication steel wire, welding steel wire, spring steel wire, piano steel wire and other special steel wire, etc.# according to the surface condition, it is divided into polished steel wire, polished steel wire, pickled steel wire, smooth steel wire, black steel wire, galvanized steel wire and other metal steel wire, etc.

Six: wire rope! According to the number of strands, it is divided into single strand steel rope, six strand steel rope and eighteen strand steel rope, etc. "according to the inner core material, it is divided into organic core steel rope and metal core steel rope, etc.# according to the surface condition, it is divided into non-galvanized steel rope and galvanized steel rope.