Due to the increased dimensional accuracy, surface roughness and mechanical properties and other requirements, the use of cold-rolled cold-rolled sections and cold-drawn sections of the production of cold drawn profiles, than in the past have been greatly developed. Cold-drawn and cold-rolled profiles can be used not only for special-purpose components, but also to replace hot-rolled profiles for large metal savings.

Cold-formed plate is the strip at room temperature by bending the production of profiles. Due to the significant increase in metal strength due to cold-formed deformation and the use of cold-forming to produce thin-walled sections and complex section sections that can not be produced by hot-rolling methods, cold-formed sections instead of hot-rolled sections generally save metal 20 % ~ 50%. Since the 1980s, cold-formed sections in industrialized countries have been developing rapidly, accounting for about 2% to 4% of the total. With the civil construction, automobile manufacturing, tractor manufacturing and other industries, the production and application of cold-formed profiles will continue to expand.

The use of extrusion production profiles, in the production of extrusion has a more intense than the rolling three-way compressive stress state, the metal can play its greatest plasticity, can be difficult to process the metal deformation. In the same equipment as long as the extrusion die hole to change the shape, you can produce difficult to produce by rolling the cross-sectional shape is extremely complex and variable cross-section profile. Squeeze production flexibility, ideal for small quantities and more varieties of production; product size accuracy, the surface quality is higher, between the hot and cold rolled profiles. Extruded profiles of many varieties, mainly non-ferrous metal alloy profiles, especially aluminum profiles. The steel produced by extrusion is mostly tubes of profiled sections of small batch, low-plasticity and difficult-to-deformable high-alloy steels.

Welding profiles are straightened plate welding profiles. Production of profiles by welding not only saves metal, but it also produces oversized profiles, which are mostly used for the production of H-beams. With the development of sheet metal production, the proportion of welded profiles will also increase day by day. Jiangsu Shanghai cold-formed profiles in my company are fully reflected.