Why Is Aluminium Used For Aircraft Bodies

Why is aluminium used for aircraft bodies? Because aluminum alloys are relatively less dense, they can reduce the weight of the aircraft and thus carry more payload. At the same time, the mechanical strength and mechanical properties of aircraft grade aluminum alloy can meet the requirements of aircraft manufacturing and safety. Therefore, aluminum alloy is selected as the aircraft body materials.

Compared with ordinary aluminum alloys, aluminum alloys for aircraft have higher requirements on strength, hardness, toughness, fatigue resistance and plasticity. Due to its light weight and remarkable lightweight effect, aircraft grade aluminum alloy has replaced steel and occupies the dominant position of current aviation materials. That is another reason why is aluminium used for aircraft bodies. Aviation equipment has higher requirements for aluminum, and is an important high-end application market for aluminum.

The aluminum used in aircraft structures around the world are mainly high-strength 2000 series aluminum(2024, 2017, 2A12, etc.) and ultra-high-strength 7000 series aluminum (7075, 7475, 7050, 7A04, etc.), and some 5000 series aluminum (5A06, 5052, 5086, etc.) and 6000 series aluminum (6061, 6082, etc.) and a small amount of other series of aluminum alloy. Aircraft aluminum is mainly used in wing skin, wing truss, upper and lower edge strips of spar, web, fuselage truss, seat rail, keel beam, side frame, fuselage skin, lower fuselage siding, main floor stringers, etc.

Above are the explain why is aluminium used for aircraft bodies. Aircraft grade aluminum alloy is the backbone material for the manufacture of aircraft and aerospace vehicles. With the continuous improvement of the requirements for flight performance, payload, fuel consumption, service life and safety and reliability of contemporary aircraft design and manufacture, higher and higher requirements are also put forward for the comprehensive performance and reduction effect of aluminum alloy structures.