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