Classification and characteristics of aluminum alloy

According to the composition ratio of each chemical element, aluminum alloy can be divided into: 1 series-9 series.

1 department:

Features: More than 99.00% aluminum, good electrical conductivity, good corrosion resistance, good welding performance, low strength, and cannot be strengthened by heat treatment.

Application: High-purity aluminum (more than 99.9% aluminum content) is mainly used for scientific experiments, chemical industry and special purposes.

2 Department:

Features :: Aluminum alloy with 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 smelting (will produce harmful gases). 2014 alloy for aviation industry, high strength. The 2017 alloy has a slightly lower strength than the 2014 alloy, but is easier to process. 2014 heat treatment strengthened.

Disadvantages: Intercrystalline corrosion tends to be serious.

Applications: aviation industry (2014 alloy), screws (2011 alloy) and industries with higher temperature (2017 alloy).

3 series:

Features: Aluminum alloys with manganese as the main alloy element cannot be strengthened by heat treatment, have good corrosion resistance and good welding performance. Good plasticity. (Close to super aluminum alloy).

Disadvantages: low strength, but can be strengthened by cold working hardening. It is easy to produce coarse grains during annealing.

Applications: oil-guiding seamless tubes (3003 alloy), cans (3004 alloy) used on aircraft.

4 series:

Silicon-based, not commonly used. Some 4 series can be strengthened by heat treatment, but some 4 series alloys cannot be heat treated.

5 series:

Features: Mainly magnesium. Good resistance, good welding performance, good fatigue strength, can not be strengthened by heat treatment, and can only be cold worked to increase strength.

Applications: Mower handles, aircraft fuel tank ducts, body armor.

6 series:

Features: Mainly magnesium and silicon. Mg2Si is the main strengthening phase and is currently the most widely used alloy.

6063, 6061 are used most, other 6082, 6160, 6125, 6262, 6060, 6005, 6463.

6063, 6060, 6463 have lower strength in the 6 series. 6262, 6005, 6082, 6061 have higher strength in the 6 series.

Features: medium strength, good corrosion resistance, good welding performance, good process performance (easy extrusion molding), good oxidation coloring performance.

Scope of application: Traffic tools (such as car luggage racks, doors, windows, bodywork, heat sinks, compartment shells) The aluminum alloy materials used in our trusses and stages are 6082-T6 and 6063-T6. It has the advantages of light weight, corrosion resistance and high pressure resistance.

7 series:

Features: Zinc-based, 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 6 series alloys, and the welding performance is good. 7005 and 7075 are the highest grades in the 7 series and can be heat treated to strengthen them.

Applications: aviation (bearing components of aircraft, landing gear), rockets, propellers, aviation spacecraft.

8 series:

Most applications are aluminum foil, which is less commonly used in the production of aluminum rods.

9 series (spare alloy)