Brief-introduction-of-series-1-7-series-aluminum-alloy

Brief-introduction-of-series-1-7-series-aluminum-alloy

2021-01-29
Brief-introduction-of-1-7-series-aluminum-alloy

Nowadays, aluminum alloys are widely used in mobile phones, such as aluminum for die-casting, aluminum for stamping, aluminum for CNC, and even for aerospace products. What is the difference between these aluminum alloys? I will give a brief introduction today;
 
Series 1 Features: Aluminum content is more than 99.00%, good electrical conductivity, good corrosion resistance, good welding performance, low strength, and cannot be strengthened by heat treatment. Application range: High purity aluminum (aluminum content above 99.9%) is mainly used in scientific experiments, chemical industry and special purposes.
 
2 Series Features: Aluminum alloy containing copper as the main element. Manganese, magnesium, lead and bismuth are also added for machinability. Such as: 2011 alloy, pay attention to safety protection during the smelting process (hazardous gas will be generated). 2014 alloy used in aviation industry, high strength. The 2017 alloy has a lower strength than the 2014 alloy, but it is easier to process. 2014 can be strengthened by heat treatment. Disadvantages: The tendency of intergranular corrosion is serious. Applications: Aviation industry (2014 alloy), screws (2011 alloy) and industries with higher service temperatures (2017 alloy).
 
Series 3 Features: Aluminum alloy with manganese as the main alloy element, cannot be strengthened by heat treatment, has good corrosion resistance and good welding performance. Good plasticity (close to super aluminum alloy). Disadvantages: low strength, but it can be strengthened by cold work hardening, and coarse grains are easily produced during annealing. Application scope: seamless oil pipe (3003 alloy) and cans (3004 alloy) used on aircraft.
 
The 4 series is mainly silicon, not commonly used. Some 4 series alloys can be strengthened by heat treatment, but some 4 series alloys cannot be heat treated.
 
5 Series Features: Mainly magnesium. Good endurance, good welding performance, good fatigue strength, no heat treatment strengthening, only cold working to increase strength. Applications: Lawn mower handles, aircraft fuel tank ducts, body armor.
 
Generally, the middle-end and above shoe racks are basically 6 series or 7 series
 
Series 6 Features: Mainly magnesium and silicon. Mg2Si is the main strengthening phase and is currently the most widely used alloy. 6063, 6061 are most used, other 6082, 6160, 6125, 6262, 6060, 6005, 6463. 6063, 6060, 6463 are relatively low in strength in the 6 series. 6262, 6005, 6082, 6061 have higher strength in the 6 series. The frame in the middle of Cyclone II is 6061. Features: medium strength, good corrosion resistance, good welding performance, good process performance (easy to be extruded), good oxidation and coloring performance. Application range: energy transfer tools (such as: car luggage rack, door, window, body, heat sink, box shell)
 
7 Series Features: Mainly zinc, but sometimes a small amount of magnesium and copper are added. Among them, super-hard aluminum alloys contain zinc, lead, magnesium and copper alloys close to the hardness of steel. The extrusion speed is slower than the 6 series alloy, and the welding performance is good. 7005 and 7075 are the highest grades in the 7 series and can be strengthened by heat treatment. Application scope: aviation (aircraft load-bearing components, landing gear), rockets, propellers, aviation ships.


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