Specification of angle steel

　　It is mainly divided into two categories: equal angle steel and unequal angle steel, among which unequal angle steel can be divided into unequal edge equal thickness and unequal edge unequal thickness.

　　The specification of angle steel is expressed by the dimension of side length and side thickness. At present, the specification of domestic angle steel is 2-20, and the number of centimeters of side length is taken as the number. The same angle steel often has 2-7 different edge thicknesses. The imported angle steel shall be marked with the actual size and thickness of both sides and relevant standards. Generally, large angle steel is more than 12.5cm long, medium angle steel is between 12.5cm and 5cm long, and small angle steel is less than 5cm long.

　　The order of inlet and outlet angle steel is generally based on the specifications required in use, and the steel grade is the corresponding carbon steel grade. Besides the specification number, angle steel has no specific composition and performance series. The delivery length of angle steel can be divided into fixed length and multiple length. The selection range of fixed length of domestic angle steel includes 3-9m, 4-12m, 4-19m and 6-19m according to different specifications. The length selection range of angle steel made in Japan is 6-15m.

　　The section height of unequal angle steel is calculated according to the length and width of unequal angle steel. It refers to steel with angular section and unequal length on both sides. It is a kind of angle steel. Its side length is 25mm × 16mm～200mm × l25mm。 It is rolled by hot rolling mill.

　　The general specification of unequal angle steel is: N50 * 32 -- N200 * 125, and the thickness is 4-18mm.

　　Unequal angle steel is widely used in various metal structures, bridges, machinery manufacturing and shipbuilding, various building structures and engineering structures, such as house beams, bridges, transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouses.