Carbon steel profiles are objects with a certain geometry made of carbon steel by rolling, extrusion, casting and other processes. These materials have the appearance of a certain size, section is a certain shape, with certain mechanical and physical properties. Profiles can be used alone or further processed into other manufactured products, and are often used in building structures and manufacturing installations. Mechanical engineers can select the specific shape, material, heat treatment state, mechanical properties and other parameters of the profile according to the design requirements, and then divide the profile according to the specific size and shape requirements, and then further process or heat treatment to achieve the precision requirements of the design. The material and size of the profile can refer to the corresponding national standards.