Channel steel is divided into ordinary channel steel and light channel steel, both of which have the same appearance. The difference is that the lightweight waist and leg thickness is thinner than ordinary channel steel, and the unit weight is lighter. Channel steel can be divided into four types according to the shape: cold-formed equal-edge channel steel, cold-formed unequal-edge channel steel, cold-formed inner-curled channel steel, and cold-formed outer-curled channel steel.

Channel steel specification setting

The specifications of the channel steel are mainly expressed by the millimeters of waist height (h) * leg width (b) * waist thickness (d), such as 100*48*5.3, which means that the waist height is 100 mm, the leg width is 48 meters, and the waist thickness is 5.3mm channel steel or 10# channel steel. For channel steel with the same waist height, if there are several different leg widths and waist thicknesses, it is also necessary to add abc on the right side of the model to distinguish them, such as 25#a25#b25#c, etc.

At the same height, light channel steel has narrower legs, a thinner waist, and a lighter weight than ordinary channel steel. No. 18-40 is a large channel steel, and No. 5-16 channel steel is a medium-sized channel steel. The imported channel steel indicates the actual size and relevant standards. The import and export order of channel steel is generally based on the specifications required in use after determining the corresponding carbon steel (or low alloy steel) steel grade. In addition to the specification number, channel steel has no specific composition and performance series.

The delivery length of channel steel is divided into two types: 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 3 types: 5-12m, 5-19m, and 6-19m according to different specifications. The length selection range of imported channel steel is generally 6-15m.