Channel steel is divided into ordinary channel steel and lightweight channel steel. Hot-rolled ordinary channel steel has specifications ranging from 5# to 40#. Hot-rolled variable channel steel, supplied by mutual agreement between the supplier and the buyer, has specifications ranging from 6.5# to 30#. Channel steel is primarily used in building structures, vehicle manufacturing, other industrial structures, and fixed cabinets. Channel steel is often used in conjunction with I-beams.

Channel steel can be divided into four types based on shape: cold-formed equal-leg channels, cold-formed unequal-leg channels, cold-formed inner-flange channels, and cold-formed outer-flange channels. According to steel structure theory, the channel flanges should bear the load, meaning the channel should stand upright, not flat.

Channel Steel Specifications

Channel steel specifications are primarily expressed in terms of height (h), leg width (b), and waist thickness (d). Currently, domestic channel steel specifications range from 5# to 40#, corresponding to heights of 5 to 40cm.
At the same height, lightweight channels have narrower legs, thinner waists, and are lighter than standard channels. Channels ranging from 18 to 40 are considered large, while channels ranging from 5 to 16 are considered medium. Imported channels are marked with the actual dimensions and relevant standards. Import and export orders for channels are generally based on the required specifications after determining the corresponding carbon steel (or low-alloy steel) grade. Aside from the specification number, channels do not have specific composition or performance series.

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