High-strength 6061 aluminum rectangular tube stock is strong, easy to machine, and weld. These tubes are heat treatable and can be anodized or coated for added protection. Typical uses include aircraft components, cameras, couplings, marine fittings, and hardware. Additional applications include electrical components and connectors.

Architectural 6063 aluminum rectangular tubes are lightweight, resist corrosion, and are easy to form and machine. They have a smoother surface than 6061 aluminum tubes and are often used for interior and exterior building structures, marine items, and anodizing cylinder tubes. Type 6063 aluminum is also called an architectural alloy.