This specification covers an aluminum alloy in the form of extruded bars, rods, wire, profiles 5.000 inches (127.00 mm) and under in nominal diameter or thickness and 32 square inches (206 cm²) and under in cross-sectional area, and tubing 3.000 inches (76.20 mm) and under in wall thickness and 20 square inches (129 cm²) and under in cross-sectional area (see 8.5).