Flat steel refers to steel with a width of 12-300mm, a thickness of 3-60mm, a rectangular cross-section with slightly rounded edges. Flat steel can be either finished steel or used as the billet for welding pipes and thin sheet plates. Main applications: Flat steel, as finished products, can be used to make hoops, tools and mechanical parts. In construction, it is used as structural components for buildings and staircases. There are both non-galvanized flat steel and galvanized flat steel.