Channel steel is a long strip of steel with a groove-shaped cross-section. Sectional steel with a channel shape. Channel steel is divided into ordinary channel steel and light channel steel. The specifications of hot-rolled ordinary channel steel are 5-40#. The specifications of hot-rolled modified channel steel supplied by agreement between the supplier and the buyer are 6.5-30#. Channel steel is mainly used in building structures, vehicle manufacturing, other industrial structures and fixed panels. Channel steel is often used in conjunction with I-beams.

In the channel steel specification table, the specifications of channel steel are mainly expressed by height (h), leg width (b), waist thickness (d) and other dimensions. For example, 100*48*5.3 means that the waist height is 100 mm and the leg width is 48 mm, the waist thickness is 5.3 mm, or 10# channel steel. For channel steel with the same waist height, if there are several different leg widths and waist thicknesses, abc must be added to the right of the model number to distinguish, such as 25#a25#b25#c, etc. At present, the specifications of domestic channel steel range from 5 to 40, that is, the corresponding height is 5 to 40cm.

At the same height, light channel steel has narrower legs, thinner waist, and lighter weight than ordinary channel steel. No. 18-40 are large channel steels, and No. 5-16 channel steels are medium-sized channel steels. Imported channel steel is marked with actual specifications, dimensions and related standards. The import and export orders of channel steel are generally based on the specifications required for use after determining the corresponding carbon steel (or low alloy steel) steel grade. Apart from specification numbers, channel steel does not have a specific composition and performance series.

Channel steel is a carbon structural steel used in construction and machinery. It is a profiled steel material with a complex cross-section, and its cross-section shape is channel-shaped. Channel steel is mainly used in building structures, curtain wall engineering, mechanical equipment and vehicle manufacturing, etc. In use, it is required to have good welding, riveting performance and comprehensive mechanical properties. The raw material billets for producing channel steel are carbon steel or low alloy steel billets with a carbon content of no more than 0.25%.

The finished channel steel is delivered in a hot-formed, normalized or hot-rolled state. The delivery length of channel steel is divided into fixed length and double length, and the tolerance value is specified in the corresponding standard. The length selection range of domestic channel steel is divided into three types according to different specifications: 5-12m, 5-19m, and 6-19m. The length selection range of imported channel steel is generally 6-15m.