Aluminum low density, but the strength is relatively high, close to or more than high quality steel, plastic, can be processed into a variety of profiles, with excellent electrical conductivity, thermal conductivity and corrosion resistance, widely used in industry, usage after the steel . Aluminum two broad categories: cast aluminum alloy, the use of the cast; deformation of aluminum alloy, can withstand the pressure processing. Processed into various forms, specifications of aluminum material. Mainly for the manufacture of aviation equipment, building doors and windows. Aluminum alloy by deformation processing methods can be divided into aluminum and cast aluminum. Deformation is divided into non-alloy aluminum alloy and heat treatment to strengthen aluminum alloy can be heat strengthened. Enhanced heat treatment can not be to improve the mechanical properties by heat treatment, can only be achieved through the cold deformation strengthening, which includes high purity aluminum, industrial high purity aluminum, industrial aluminum and rust-proof aluminum. Heat treatable aluminum alloy can be enhanced by means of quenching and aging heat treatment to improve mechanical properties, which can be divided into hard aluminum, wrought aluminum, super-hard aluminum and special alloy and so on.