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. Angle steel is carbon structural steel for construction, is a simple section of steel, mainly used for metal components and the framework of the plant. In use, it is required to have good weldability, plastic deformation performance and mechanical strength.