3003-H14 Aluminum Plate - (ASTM B209, QQ-A-250/2) Excellent weldability and formability, with good corrosion resistance makes 3003 Aluminum Plate a popular and economical choice. 3003 Aluminum Plate has a smooth, shiny finish and is popular for many cosmetic and industrial applications, including: decorative trim, fuel tanks, food & chemical handling, trailer siding & roofing, etc.