Channel steel is a long strip of steel with a groove-shaped section, which is a carbon structural steel for construction and machinery. It is a section steel with a complex section, and its section shape is groove-shaped. Channel steel is mainly used for building structure, curtain wall engineering, mechanical equipment and vehicle manufacturing.

Angle steel, commonly known as angle iron, is a long strip of steel with two sides perpendicular to each other. Angle steel can be composed of different force components according to the different needs of the structure, and can also be used as a connector between components. Widely used in various building structures and engineering structures, such as beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks, cable trench supports, power piping, bus support installation, and warehouse shelves.