Uchannel（U-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. U-Steel is mainly used in building structure, curtain wall engineering, mechanical equipment and vehicle manufacturing., u-steel is often used together with I steel.
U-steel is divided into ordinary u-steel and light u-steel. The specification of hot rolled ordinary u-steel is 5-40#. The specification of hot rolled flexible u-steel is 6.5-30# after  agreement between the purchaser and the supplier. 
U-steel according to the shape can be divided into four kinds :
 cold bending equilateral u-steel, cold bending unequal side u-steel, cold bending inner edge coil u-steel, cold bending outer edge coil u-steel.

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