Angle Steel Bar , commonly known as Angle iron, is a long strip of steel that is perpendicular to each other and angular. There are equal angles and unequal angles. The two sides of an equilateral Angle are equal in width. Its specifications are expressed in millimeters of side width × side width × side thickness. For example, ∟30 x 30 x 3 indicates an equal Angle steel with a width of 30 mm and a thickness of 3 mm. It can also be represented by the model number, which is the number of centimeters of the side width, such as ∟3#. The model does not indicate the dimensions of different side thicknesses in the same model, so the side width and side thickness dimensions of the Angle steel are complete in the contract and other documents, so as to avoid being represented by the model alone. Hot rolled equal-edge Angle steel specifications are 2#-20#. Angle steel can be composed of different stress components according to the different needs of the structure, and can also be used as a connection between the components. It is widely used in various building structures and engineering structures, such as beams, Bridges, power transmission towers, lifting and transportation machinery, ships, industrial furnaces, reaction towers, container racks and warehouses.