Cold-formed steel refers to a finished steel product of various cross-sectional shapes bent by a steel plate or a strip steel in a cold state. Cold-formed steel is an economical thin-section thin-walled steel, also known as steel-refrigerated curved or cold-formed profiles. Cold-formed steel is the main material for making lightweight steel structures. It has a variety of extremely thin, well-shaped and complex sections that cannot be produced by hot rolling.c profile steel suppliers
Cold-formed steel is widely used in foreign construction industry and is used as urban rail transit, subway, three-dimensional garage, roof truss, purlins, trusses, rigid frames, wall frames, keels, roof slabs, wall panels, slabs, doors and windows, and even containers. Pipes, cofferdams, steel sheet piles, breakwaters, etc.
Compared with hot-rolled steel, the radius of gyration can be increased by 50-60% and the moment of inertia of the section can be increased by 0.5-3.0 times in the same cross-sectional area, so that the material strength can be used reasonably; That is to say, the steel structure made of the traditional I-beam, channel steel, angle steel and steel plate can save about 30 to 50% of the steel. The important feature of cold-formed steel is that it is an economical section steel, which can produce various complicated sections. It mainly improves the section strength by changing the section shape of the section steel.
In recent years, reticulated shells, shelves, single-story and multi-storey houses with cold-formed steels have also developed rapidly. In developed countries, the construction industry is a large user of cold-formed steel, cold-formed steel accounts for 5% of total steel, cold-formed steel for construction industry accounts for more than 70% of cold-formed steel, and cold-formed steel products are used in construction. Mainly used for cold-formed rectangular tubes for structural use and cold-formed steel for construction. From the perspective of structural mechanics and economy, cold-formed steel and H-shaped steel are combined in the construction industry to be a combination, which can realize the industrialization of industrial plants and residential buildings.