At the same height, light channel steel has narrower legs, thinner waist and lighter weight than ordinary channel steel. No. 18-40 is a large channel steel, and No. 5-16 is a medium channel steel. 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. Apart from the specification number, there is no specific composition and performance series for channel steel.

Wire ropes are used in all walks of life. Mining, metallurgy, railway construction, fishery production and ships, aerial ropeway, forestry mining, aviation, hoisting, storage and transportation, construction, oil exploration, etc.

Angle steel, commonly known as angle steel, is a long strip of steel with two sides perpendicular to each other. Angle steel is divided into equilateral angle steel and unequal angle steel. Equilateral angle steel has the same width on both sides, and its specifications are expressed in millimeters of side width × side width × side thickness. The model does not indicate the size of different edge thicknesses in the same model, so the edge width and edge thickness of the angle steel should be filled in the contract and other documents to avoid using the model alone.