Angle iron can be assembled into various load-bearing components with different structures and also serves as connecting elements between components. It is widely used in various architectural and engineering structures, such as beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container frames, cable trough supports, power piping, busbar supports, and warehouse shelving. Angle iron is a carbon structural steel used for construction, which is a simple-section profiled steel. It is mainly used for metal components and the frames of buildings. It requires good weldability, plastic deformation properties, and certain mechanical strength during use. The raw material for producing angle iron is low-carbon square billets, and the finished angle iron is delivered in hot-rolled, normalized, or hot-rolled condition.