Aluminum density is low, but the intensity is relatively high, close to or exceed the high quality steel, aluminum, plastic, can be processed into a variety of profiles, with excellent electrical conductivity, thermal conductivity and corrosion resistance, widely used in industry, usage only inferior steel. Some aluminum alloys can be used to heat treatment to obtain good mechanical properties, aluminum manufacturers, physical properties and corrosion resistance. Duralumin case of AI-Cu-Mg system, generally contain small amounts of Mn, can be heat strengthened. Its characteristics are hardness, aluminum ball, but poor ductility. Super-hard aluminum case of Al-Cu-Mg-Zn-based, can be heat strengthened, the highest strength aluminum alloy at room temperature. But poor corrosion resistance, high temperature softening quickly. Wrought aluminum alloys mainly Al-Zn-Mg-Si based alloy, although many kinds of added elements, but less content, which has excellent thermoplastic, suitable forging, so called forged aluminum. 1) Weld tendency of large deformation and crack formation. Coefficient of linear expansion and shrinkage of a crystalline aluminum than steel is about twice as large, easy to produce high welding stress deformation of the rigid structure will cause heat cracks. Thermal conductivity 2) large aluminum (aluminum 0.538 card /Cm.s.℃). About four times stronger than steel, and therefore, when welding aluminum and aluminum alloys, welding steel than to consume more calories. 3) evaporation of the burning of alloying elements. Aluminum containing low boiling point elements (such as magnesium, zinc, manganese, etc.), at a high temperature arcing, burning easily evaporate, thereby changing the chemical composition of the weld metal, weld performance. 4) low temperature strength and ductility. High temperature strength and ductility of aluminum is very low, undermining the weld metal forming, aluminum prices, sometimes also likely to cause collapse of the weld metal and weld wear phenomenon. 5) no color change. Aluminum and aluminum alloy from the solid state into liquid, no obvious color change, so that the operator is difficult to grasp the heating temperature. Aluminum manufacturers, aluminum, Shengxin recycling scrap metal recycling scrap metal from the Linyi City Shengxin Limited. Linyi City Shengxin scrap metal recycling Ltd. (shengxin.tz1288.com) strong, credible, in Linyi, Shandong scrap metal industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shengxin scrap metal recycling into the brilliant and you work for a better future!