Aluminium Ingot is a kind of silver white metal, ranking the third in the earth’s crust after oxygen and silicon. Aluminium has a small density, only 34.61% of iron and 30.33% of copper, so it is also called light metal. Aluminium is a non-ferrous metal whose output and consumption are second only to steel in the world. The density of aluminium is only 2.7103g/cm ³， About 1 / 3 of the density of steel, copper or brass. Due to its light material, aluminum is often used to manufacture land, sea and air vehicles such as automobiles, trains, subways, ships, aircraft, rockets and spaceships to reduce the dead weight and increase the loading capacity.