Aluminum alloy grades and industrial applications: 1 alloy: 1 series aluminum alloys as aluminum add a small amount of copper and which has excellent forming properties, high corrosion resistance, good weldability and conductivity, widely used in strength less demanding products, such as chemical equipment, sheet metal processing, deep drawing or press trip hollowware, welding parts, heat exchangers, bell surface and disk, plate, kitchenware accessories, caps, appliance housings and other fields. Commonly used are 1050, 1060, 1070 and other soft aluminum. 2 alloy: 2 series aluminum alloy aluminum - copper - magnesium lines of hard alloy, 2024-T351 which is a typical representative of 2 lines, its composition is more reasonable, better overall performance. Many countries are producing this alloy, it is the largest amount of hard aluminum. Characteristics of the alloy: high strength, a certain heat resistance, can be used as a working member 150 ℃ under. When the temperature is higher than 125 ℃, the alloy strength is higher than 7075 2024 alloy. Thermal state, annealing and forming a new state under sudden fire performance is better than the heat treatment significantly enhanced the effect, but the heat treatment process demanding. Poor corrosion resistance, but with aluminum coating can be effectively protected, easy to crack when welding, but can be welded using a special process to be riveting, widely used in aircraft structures, rivets, card wheel hub, propeller components and various other structure. Commonly used 2011,2014,2017,2024 and so on. Alloy 3: 3 series aluminum alloy elements are mainly manganese, a rust-proof aluminum, has excellent molding characteristics, high abrasion resistance, good solderability and electrical conductivity, strength higher than 1100, is widely used in kitchen utensils, various pressure vessels and piping food and chemical products processing and storage equipment, tank transport of liquid products, cans, and sheet metal processing, heat exchangers, rivets, wire, washing machine cylinder. Commonly used in 3003,3004 and so on. 5 alloy: 5 Series main alloying elements are magnesium aluminum alloy aluminum, aluminum - magnesium-based alloy good anti-corrosion effect, in which 5083 is an aluminum - magnesium-based alloy typical rust-proof aluminum. Its properties are: excellent weldability and good corrosion resistance, excellent processability and low-temperature reasonably combined. Its processing characteristics: non-heat strengthened, its tensile strength aluminum - magnesium alloy after 5056, which may be equal to the strength of welded joints fundamental strength annealed state, and reliable corrosion resistance, as the temperature decreases, the basic tensile strength of the metal box welded joints, with an increasing elongation, low temperature toughness is also very good, so 5083 became the most basic welding aluminum structural materials. For applications requiring high corrosion resistance, good weldability and moderate-intensity combined as ships, cars and airplanes plate welding parts, should be strictly fireproof pressure vessels, refrigeration equipment, tower, drilling equipment, transportation equipment, etc. . Commonly used 5083,5052,5086 and so on. 6 alloy: 6 series aluminum alloy main alloying elements magnesium and silicon, and the formation of Mg2si phase. If a certain amount of manganese and chromium, and iron can be side effects; sometimes add small amounts of copper and zinc, to improve the strength of the alloy, and not make it significantly reduces the corrosion resistance. Features 6061-T651 alloy: Heat-treated high-quality pre-stretching process alloy, its strength, although not with the 2 and 7 Series compared, but Mg, Si alloy characteristics more, with excellent price performance, excellent welding characteristics and plating resistance, good corrosion resistance, high toughness, not deformed after processing, material defect-free and easy to compact dry polishing, color film is easily oxidized excellent results and other advantages. For aerospace fixtures, electrical fixtures, communications, automated machinery parts, precision machining, mold manufacturing, electronics and precision instruments, SMT, PC board solder vehicles and so on. Commonly used 6061-T651,6063 like. 7 alloy: 7 series aluminum main element zinc is added to the alloy magnesium containing 3% to 75% zinc can be formed remarkably MgZn2 strengthening effect, so that the combined effect of heat treatment i gold far better than aluminum - zinc bis Yuan alloys. Increase in zinc alloy, magnesium content, tensile hardness will be further improved, but its resistance to stress corrosion and exfoliation corrosion will fall. By heat treatment, it can reach very high strength characteristics. The Department of Materials usually a small amount of copper, chromium and other alloys. The line for the top grade aluminum to 7075-7651, known as the best product in aluminum alloy, high strength, far better than mild steel. This alloy has good mechanical properties and the anode reaction. Mainly used in aerospace, tooling, machinery and equipment, fixture, particularly for high-aircraft structures and other requirements of strength, corrosion resistance and strong high-stress structure. Commonly used are 7075, 7050 and so on. Competitor: A. Hardness: from the point of view that can reach the highest hardness, followed by the 7 Series, 2 Series, 6 Series, 5 Series, 3 Series, 1 Series. B Strength: Minimum strength aluminum, 2 and 7 Series heat-type alloy the highest intensity. (Hardness and strength of certain proportional relationship) C corrosion resistance: 1 Series the best corrosion resistance of aluminum, 5 and performed well, followed by the 3 Series and 6 Series, 7 series 2 system is poor. D processing performance: formability and processability including cutting, etc., because forming with the state, the choice of alloy grades, but also need to consider the strength of the scope of the various states, usually forming high strength materials is not easy. If you want to be on the aluminum bending, stretching, deep drawing and other forming process, complete the forming of the annealed condition the best. Conversely, heat the material forming the longest. Cutting aluminum alloy composition and have a great relationship, usually high-strength aluminum alloy machinability better. Conversely, low intensity were poor machinability. For molds, machinery parts and other necessary cutting products, cutting of aluminum is important considerations. E welding performance: aluminum welding majority had no problems, especially some 5 series aluminum alloy is designed for welding into account and design, Part 2 and 7 Series aluminum welding more difficult. F decorative properties: G Other features: electrical conductivity, wear resistance and heat resistance.