7A04 aluminum alloy sheet / Changsha 5052-H32 aluminum / southwest of aluminum, the preferred construction the United States copper and aluminum. 


 General Characteristics of aluminum 
 The excellent characteristics of aluminum and its alloys, good appearance, light weight, can machining, physical and mechanical properties, corrosion resistance in many applications in the most economical and practical. The density of aluminum is only 2.7 × 103 kg / m3, and around the density of steel, copper or brass 1/3. The light weight aluminum, commonly used in the manufacture of cars, trains, subways, ships, aircraft, rockets, spacecraft and other land, sea and air transport in order to reduce the weight to increase the loading capacity. Aluminum is also widely used in military. 
 In most environmental conditions, including air, water (or brine), petrochemical and many chemical systems, aluminum shows excellent corrosion resistance. 
 The aluminum surface with a high degree of reflection, radiation, visible light, radiant heat and radio waves can be effectively aluminum reflector, by anodic oxidation and dark anodized surface is reflective, can also be absorbent, polished aluminum in a wide wavelength range, good reflection, thus the use of a variety of decorative purposes and reflection function. 
 The aluminum is usually demonstrated excellent electrical conductivity, the conductivity rate of about two-thirds of the copper, but its density is only one-third of the copper, therefore, the quality and length of aluminum wire and copper than the conductivity of aluminum is about twice that of copper, and the price is lower than copper, low-cost applications, so the selection of often electric power industry and electronics industry. At present, certain aluminum alloys with high resistivity have also been successfully developed, these alloys can be used such as high turn Ju motor. Thermal conductivity of aluminum is high, second only to the thermal conductivity of copper, aluminum is three times larger than iron, about 50% to 60% of the copper. Although the thermal conductivity of copper, but manufacturing the same size of the workpiece weight than aluminum is much larger, the price is also much more expensive than aluminum. Therefore, manufacturing radiator aluminum is preferred. The cost of aluminum manufacture of heat exchangers, evaporators, heating appliances, cooking utensils, as well as automotive cylinder head and radiator are very favorable. 
 Aluminum non-ferromagnetic, which is an extremely important feature in terms of electrical and electronic industries. 
 Aluminum is not spontaneous combustion, this very important industry involving the handling or contact with flammable materials. The toxicity of aluminum is very small, typically used for manufacturing Sheng food and beverage containers. In recent years, aluminum foil, pharmaceuticals, food packaging applications more widely, has become an important material of the packaging industry. 
 Aluminum natural surface state has a pleasant appearance. It is soft, shiny, and beautiful, but also coloring or infected with the texture pattern. In modern life, aluminum has been widely used in the construction industry and daily use. Aluminum also has good acoustic performance, this feature - some radio room, the ceiling of modern building and some use of aluminum.