An aluminum flat bar is a solid rectangular section of aluminum, produced by extrusion or cutting, that offers a combination of light weight, corrosion resistance, and ease of machining. It is available in various alloys—such as 6061 for high strength, 6063 for superior surface finish, and 1100 or 3003 for excellent formability—making it suitable for structural, decorative, and fabrication uses. Common sizes range from thin strips to heavy-duty sections, with typical thicknesses from about 0.08″ (2 mm) to 9.8″ (250 mm) and widths from 0.2″ (5 mm) to 12″ (300 mm). Standard finishes include mill finish, with options like brushed or anodized for enhanced appearance and durability. Produced to standards such as ASTM B221, aluminum flat bars are widely used in construction, machinery, transportation, and DIY projects.
