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

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.

The checkered plate has many advantages such as beautiful appearance, anti-skid, enhanced performance, and steel saving.

Cold-rolled steel is made from hot-rolled coils, which are rolled at room temperature below the recrystallisation temperature. The thickness of cold rolled steel sheet is generally between 0.1 and 8.0mm, with most factories producing cold rolled steel up to 4.5mm.

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.

Checkered steel plate is steel plate with a raised (or recessed) pattern on the surface.

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.

Spiral pipes are mainly used for oil and natural gas transmission pipelines, and their specifications are expressed by outer diameter * wall thickness.