Aerospace industry

Lightweight, low-temperature resistance, high strength, and low cost; 6000 series aluminum alloys (e.g., 6061 and 6063) have relatively low strengths but feature excellent ductility, and are commonly used for airframes and structural fuselage components, bolts, and door and window frames. 7000 series aluminum alloys, such as 7075, are the strongest of all aluminum alloys and are commonly used in locations requiring the strongest structural components. The windward side of an aircraft mainly comprises this alloy. Examples of this include the outer panels of the wings and reinforcement components for the longeron, empennage, ribs, and bulkhead. In addition, these alloys are commonly applied to gears, shafts, instrument shafts, and turbines.