Why is aluminum used for aircrafts?

Answer 1

Aluminum alloys are used to make aircraft because they are much stronger than steel pound for pound. Another advantage is that aluminum is corrosion resistant.

Aluminum is very lightweight for its strength. This makes it an ideal material for airplanes where every extra pound of weight means one less pound of payload.

Many modern aircraft are now being made of composite materials which are even lighter (and stronger) than aluminum.

Not exactly aluminum,an alloy of Al "MAGNALIUM".Magnalium is expensive than aluminum and having high strength and low density.
Aluminium is light,yet strong enough to withstand abuses to an airplane

Answer 2

Aluminum Alloy is light weight and can be made into thin sheets that are very strong. Most airplanes are made with think aluminum skin that are riveted on so the "skin" carries the loads on the outside of the wing and fuselage. This is called monocoque. The properties of aluminum makes it a good metal to use for this type design. Steel is a stronger metal but it is too strong for this application. The stresses in the thin "skin" are just right for the strength of the Aluminum Alloy. Steel is stronger and would not be carrying stresses near it maximum strength. The skin could be made thinner but then it would be difficult to work with and rivet together. Titanium is a metal that fits between the strength of Aluminum Alloy and Steel. However, it is very difficult to machine---it resists heat and this causes the maching tool to heat up. However, Titanium Alloys are used in many applications and it is used for the frame and skin around the engines and engine pylons as it does a great job of resisting heat transfer. Titanium is also used as bolts and heavy structures & forgings such as landing gears.

Answer 3

Aluminium is very light but strong material. Planes must be in minimum weight for disposal of fuel and engine power.