Aluminum-based alloy general.The main alloying elements are copper, silicon, magnesium, zinc, manganese, minor alloying elements such as nickel, iron, titanium, chromium, lithium.Aluminum density is low, but the intensity 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, second only to the use of steel.