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 in2 (206 cm2) and under in cross-sectional area, and tubing 3.000 inches (76.20 mm) and under in wall thickness and 20 in2 (129 cm2) and under in cross-sectional area (see 8.5).