In use requires its better welding, riveting performance and overall mechanical properties. The raw material billet for channel steel is a carbon steel or low alloy steel billet with a carbon content of not more than 0.25%. Finished channel formed by hot working, normalized or hot rolled state delivery. Its specifications are expressed in millimeters of waist height (h) * leg width (b) * waist thickness (d), such as 100 * 48 * 5.3, waist height 100 mm, leg width 48 mm and waist thickness 5.3 mm Steel, or 10 # channel. Waist height of the same channel, if there are several different leg width and waist thickness also need to add a b c to the right of the model to be distinguished, such as 25 # a 25 # b 25 # c and so on.

Channel specifications mainly by the height (h), leg width (b), the thickness of the waist (d) and other dimensions to represent the current specifications of domestic channel from 5 -40, that is, the corresponding height of 5 -40cm.

At the same height, the light channel is narrower, thinner and lighter than normal channels. 18-40 for the large channel, 5-16 channel for the medium channel. Imported channel indicates the actual size and related standards. Channel import and export orders are generally determined in the corresponding carbon steel (or low alloy steel) after the steel, the use of the required specifications based. In addition to the specification number, the channel has no specific composition and performance series.

The delivery length of the channel steel is divided into two sizes, which are specified in the corresponding standards. Domestic channel length selection range according to different specifications are divided into 5 -12m, 5 -19m, 6 -19m three. Import channel length of the general choice of 6 -15m.