Channel steel is a long stripe of steel with a fluted  section , construction and mechanical use of carbon structural steel, is a profile steel with  complex section , its section shape is groove shape. Channel steel is mainly used in building structure, curtain wall engineering, mechanical equipment and vehicle manufacturing., Channel steel is often used together with I steel.

Channel steel is divided into ordinary u-steel and light Channel steel. The specification of hot rolled ordinary Channel steel is 5-40#. The specification of hot rolled flexible Channel steel is 6.5-30# after agreement between the purchaser and the supplier.

Channel steel according to the shape can be divided into four kinds :

cold bending equilateral u-steel, cold bending unequal side Channel steel, cold bending inner edge coil Channel steel, cold bending outer edge coil u-steel.