This Square Bar is available as 6082 T6 grade, the highest strength of all our aluminium square bars & known in the metal industry as a 'structural alloy' The material is good for machining & welding, & uses are usually outdoors, taking advantage of the excellent corrosion resistance properties.6082 T6 is suited to many rigid & structural fabrications, including: Balustrades, posts & railings Road signs Trucks & trailers Frame building