Material Specification SUS 304, 304L, 316, 316L Characteristics Stainless steels are iron alloys with other alloying elements added to enhance its structure and properties such as formability strength and toughness. Stainless steels can compete with higher cost engineering metals and alloys whilst offering a range of corrosion resisting properties suitable for a wide range of applications. Profiles Available Round Bar Hexagon Bar Square Bar Flat Bar Angle Bar Hollow Bar Pipe / Tube Plate / Sheet