Hot rolled, that is, hot rolled coil, which is made of slab (mainly continuous casting billet) as raw material, and is made into strip steel by rough rolling mill and finishing mill after heating.

Cold coils are made from hot-rolled coils, which are rolled at room temperature below the recrystallization temperature, including plates and coils.

The advantage of hot-rolled sheet is that it is hot-rolled at high temperature, which can remodel the internal structure of the steel and make the grains of the steel finer.

Carbon steel tubes are made of steel ingot or solid round steel which are perforated into wool tubes and then rolled hot, cold or cold.

Seamless carbon steel pipe (Seamless carbonsteel pipe) is made of steel ingot or solid tube blank through perforation to make capillary, and then hot-rolled, cold-rolled or cold-drawn.

Patterned steel coils are steel plates with a raised (or depressed) pattern on their surface. Patterned steel plate, also known as reticulated steel plate, is a steel plate with diamond-shaped or raised edges on the surface.