5083H112 aluminum tubes can be divided into the following categories according to shape divided: the tube, pipe, tube pattern, shaped by extrusion points: seamless tubes and ordinary extruded tubes by Accuracy Score: ordinary aluminum tubes and precision tubes, precision tubes which generally require reprocessing after extrusion, such as cold-drawn precision smoke rolling press thicknesses: ordinary aluminum and thin-walled tubes Performance: corrosion resistance, light weight. Characteristic of a high-strength aluminum hard, can be heat strengthened, in the annealed, hardened and thermal state just plasticity medium, spot welding is good, gas welding and aluminum welding time has a tendency to crack formed between crystal; aluminum tube after quenching and work hardening can be cutting is still good, bad in the annealed state. Corrosion resistance is not high, often with anodized and painted or surface plus clad layer method to improve corrosion resistance. It can also be used as a mold material. Aluminum advantages: First, welding technology advantages: suitable for industrial production of thin-walled copper and aluminum pipe welding technique, known as the world-class problems, is the key technology to connect the air conditioner aluminum and copper pipe. Second, the life of advantages: from the inner wall of tubes, due to the refrigerant without water, copper-aluminum connecting tube wall corrosion does not occur. Third, energy-saving advantage: air conditioner indoor unit and outdoor unit connecting pipe, the lower the energy efficiency of heat transfer efficiency, or that the more power the better the insulation. Fourth, bending performance, easy installation, relocation is a high magnesium aluminum alloy 5083, in non-heat treatable alloys good strength, corrosion resistance, good machinability. Surface appearance after anodization. Good arc performance. 5083 alloy as the main alloying elements of magnesium, has good corrosion resistance and weldability, and moderate intensity. Excellent corrosion resistance makes 5083 alloy is widely used in marine uses such as ships, as well as automobiles, aircraft welding parts, metro and light rail, should be strictly fireproof pressure vessel (such as liquid tankers, refrigerated trucks, refrigerated containers), refrigeration equipment, tower, drilling equipment, transportation equipment.