Angle Steel is popularly applied by modern buildings, equipment, factory shops & warehouses and everyday life for its low cost and reliable performances. They tend to be used as supporting or structural components for construction. What is steel angle? Steel angle, also named angle iron, or steel angle bar, is basically manufactured by hot-rolled carbon steel or high strength low alloy steel. It has L-cross shaped section with two legs - equal or unequal and the angle would be 90 degree. Structural steel angles have lots of dimensions to comply with your uses. In addition, bespoke sizes are available. As popular structural material, angle steel is largely used in bridge building, construction and engineering. According to the steel content, angle steel can be divided into mild steel angle and HSLA steel angle.