HSLA (High Strength Low Alloy) steel is a kind of steel material that increases the strength and toughness of steel by adding a small amount of alloying elements. HSLA steel is widely used in the world, especially in construction, bridges, automobiles, ships and other engineering fields. The production process of HSLA steel mainly includes hot rolling, cold rolling, heat treatment and welding. Hot rolling and cold rolling are the main ways to produce Docol 500LA HSLA steel. By rolling, the shape and size of the steel can be changed. The heat treatment process plays a crucial role in the properties of HSLA steel.