Series 1 contains more than 99.00% aluminum, and has good electrical conductivity, corrosion resistance, and welding performance; but its strength is low, and it cannot be strengthened by heat treatment. High-purity aluminum (more than 99.9% aluminum content) is mainly used in scientific experiments, chemical industry and special purposes. 

Aluminum alloys containing copper as the main alloying element also add elements such as manganese, magnesium, lead, and bismuth to enhance machinability. 2011 alloy, pay attention to safety protection during the melting process (hazardous gas will be produced). The 2014 alloy is used in the aviation industry and has high strength. The 2017 alloy has a lower strength than the 2014 alloy, but it is easier to process, and the 2014 alloy can be strengthened by heat treatment. It is often used in aviation industry (2014 alloy), screws (2011 alloy) and industries with high service temperature (2017 alloy).

Aluminum alloys with manganese as the main alloying element cannot be strengthened by heat treatment. Good corrosion resistance and welding performance. The plasticity is close to super aluminum alloy. It is used in the oil guide seamless pipe (alloy 3003) and cans (alloy 3004) used in aircraft.

The 4 series of aluminum profiles are mainly made of silicon, and some of the 4 series can be strengthened by heat treatment. 4032 has good heat resistance and friction resistance, and has a small thermal expansion coefficient. Commonly used in pistons and cylinder heads. 4043 has less solidification shrinkage, and naturally develops color after sulfuric acid anodizing treatment turns gray. Commonly used in welding lines and building panels.

It is mainly magnesium. Good heat resistance, welding performance, and fatigue strength, but it cannot be strengthened by heat treatment, and can only be improved by cold working. It is often used in handles of lawn mowers, ducts of aircraft fuel tanks, and body armor.

The strength of 5005 is the same as that of 3003. It has good processability, weldability and corrosion resistance. It has good finishing and processing after anodizing. It is commensurate with the color of 6063 profiles. 5052 is the most representative alloy with medium strength. It has good corrosion resistance, weldability and formability, especially high fatigue strength and good seawater resistance. It is generally suitable for sheet metal, ships, vehicles, construction, bottle caps, honeycomb plate.

Generally, the aluminum materials at the mid-range and above are basically 6 series. Aluminum-magnesium-silicon alloy is a composite material composed of three metals, aluminum, magnesium and silicon, and is currently the most widely used alloy. 6063 and 6061 are the most used, followed by 6082, 6160, 6125, 6262, 6060, 6005, 6463; 6063, 6060, 6463 are relatively low in strength in 6 series; 6061 with medium strength, good corrosion resistance, good welding performance, good process performance (easy to extrude), and good oxidation coloring performance.

7072 electrode potential is low, mainly used for anti-corrosion covering leather, also suitable for heat exchanger fins; 7075 is one of the alloys with the highest strength in aluminum alloys, but poor corrosion resistance; 7075 hardenable alloy , Good resistance to stress corrosion cracking, suitable for thick plates, forgings, aircraft, high-speed rotating bodies.