Type and specification of angle steel

       It is mainly divided into two types: equal leg angle steel and unequal leg angle steel. Unequal leg angle steel can be divided into two types: unequal leg equal thickness and unequal leg unequal thickness.

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

　　The order of inlet and outlet angle steel is generally based on the specifications required in use, and its steel grade is the corresponding carbon-bonded steel grade. Besides the specification number, the angle steel has no specific composition and performance series. The delivery length of angle steel is divided into fixed length and double length. The selection range of fixed length of domestic angle steel is 3-9m, 4-12m, 4-19m and 6-19m according to the specification number. 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. 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: φ 150 * 32 -- φ 200 * 125 with a thickness of 4-18mm.

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