Characteristics and Application Scope of Series 1-9 Aluminum Alloy

Aluminum alloyis divided into 1 series to 9 series. Now the small series introduces the characteristics and main application scope of each series of aluminum alloy one by one. Manufacturers producing aluminum alloy profiles can make a simple understanding.

Series 1: Features: Aluminum content above 99.00%, good conductivity, good corrosion resistance, good welding performance, low strength, and cannot be strengthened by heat treatment. Scope of application: High purity aluminum (containing more than 99.9% aluminum) is mainly used for scientific experiments, chemical industry and special purposes.

Series 2: Features:Aluminum alloywith copper as the main alloying element. Manganese, magnesium, lead and bismuth are also added for machinability. For example: 2011 alloy, pay attention to safety protection (harmful gas will be generated) during melting. The 2014 alloy used in aerospace industry has high strength. The strength of 2017 alloy is lower than that of 2014 alloy, but it is easier to process. 2014 heat treatable strengthening. Disadvantages: Intergranular corrosion tends to be serious. Application scope: aviation industry (2014 alloy), screw (2011 alloy) and industry with higher service temperature (2017 alloy).

Series 3: Features: Aluminum alloy with manganese as the main alloying element, which cannot be heat treated for strengthening, has good corrosion resistance and welding performance. Good plasticity. (Close to Super Aluminum Alloy). Disadvantages: Low strength, but strength can be strengthened by cold work hardening. Coarse grains are easily produced during annealing. Scope of application: seamless oil guide pipes (3003 alloy) and pop cans (3004 alloy) used on airplanes.

Series 4: mainly silicon, not commonly used. Part 4 can be strengthened by heat treatment, but part 4 alloy cannot be heat treated.

Series 5: Features: Magnesium is the main component. Good resistance, good welding performance, good fatigue strength, not heat treatment strengthening, only cold working to improve strength. Scope of application: mower handle, aircraft fuel tank duct, body armor. Generally, the shoe racks at the middle end and above are basically 6-series or 7-series.

Series 6: Features: Magnesium and silicon are the main components. Mg2Si is the main strengthening phase and widely used alloy at present. 6063, 6061, 6082, 6160, 6125, 6262, 6060, 6005, 6463. The strength of 6063, 6060 and 6463 is relatively low in the 6 series. The strength of 6262, 6005, 6082, 6061 is relatively high in the 6 series. The shelf at the middle end of cyclone 2 is 6061: medium strength, good corrosion resistance, good welding performance, good process performance (easy extrusion forming) and good oxidation coloring performance. Scope of application: AC tools (e.g. luggage rack, door, window, body, heat sink, compartment shell).

Series 7: Features: Zinc is the main component, but sometimes magnesium and copper are added in small amounts. Among them, superhardaluminum alloycontains zinc, lead, magnesium and copper alloy which are close to the hardness of steel. The extrusion speed is slower than that of 6 series alloy and the welding performance is good. 7005 and 7075 are the middle and high grades of the 7 series and can be strengthened by heat treatment. Scope of application: aviation (aircraft bearing components, landing gear), rockets, propellers, spacecraft.

Series 8: Other Alloys

Series 9: Spare Alloy