Photo and text from Material Base/Chinalco Association

Aluminum alloy is one of the most widely used non-ferrous structural materials in industry. It has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. With the rapid development of industrial economy, the demand for aluminum alloy welding structure is increasing day by day, which makes the research of aluminum alloy weldability also in-depth. At present, aluminum alloy is the most used alloy.

Pure aluminum smelting products and pressure processing products two categories, the former to chemical composition Al, the latter with Chinese pinyin LV (aluminum, industrial use). Aluminum alloy can be divided into deformation aluminum alloy and cast aluminum alloy according to the processing method:

The deformed aluminum alloy can withstand pressure processing. Can be processed into various forms, specifications of aluminum alloy. Mainly used for manufacturing aviation equipment, building doors and Windows, etc. The deformation aluminum alloy is divided into non-heat treatment and can be heat treatment and strengthening aluminum alloy. Non-heat treatment can not be strengthened by heat treatment to improve mechanical properties, can only be strengthened by cold processing deformation, it mainly includes high purity aluminum, industrial high purity aluminum, industrial pure aluminum and rust-proof aluminum. Heat treatable reinforced aluminum alloy can be improved by heat treatment means such as quenching and aging to improve the mechanical properties, it can be divided into hard aluminum, forged aluminum, super hard aluminum and special aluminum alloy.

According to the chemical composition of cast aluminum alloy can be divided into aluminum silicon alloy, aluminum copper alloy, aluminum magnesium alloy, aluminum zinc alloy and aluminum rare earth alloy, which aluminum silicon alloy and eutectic silicon aluminum alloy, eutectic silicon aluminum alloy, monoeutectic silicon aluminum alloy, cast aluminum alloy in the as-cast state. Deformable aluminium alloy

Series 1 :1000 series aluminum alloy represents 1050, 1060, 1100 series. In all series 1000 series belongs to a series with the most aluminum content. The purity can reach above 99.00%. Because it does not contain other technical elements, the production process is relatively simple and the price is relatively cheap. It is the most commonly used series in conventional industry at present. Most of the 1050 and 1060 series are in circulation. 1000 series aluminum plate according to the last two Arabic numbers to determine the minimum aluminum content of this series, such as 1050 series of the last two Arabic numbers for 50, according to the international brand naming principle, aluminum content must reach 99.5% or more for qualified products. China’s aluminum alloy technical standard (gB/T3880-2006) also clearly stipulates that the aluminum content of 1050 reaches 99.5%. In the same way, the aluminum content of 1060 series aluminum plate must reach 99.6% or more.

Two series :2000 series aluminum alloy represents 2024, 2A16 (LY16), 2A02 (LY6). 2000 series aluminum plate is characterized by high hardness, with the highest content of copper element, about 3-5%. 2000 series aluminum rod belongs to aviation aluminum material, which is seldom used in conventional industry.

Three series :3000 series aluminum alloy on behalf of 3003, 3A21 mainly. Our country 3000 series aluminum plate production technology is relatively excellent. 3000 series aluminum bars are made of manganese. Content between 1.0-1.5, is a good rust – proof series.

4A01 4000 series aluminum plate belongs to the series with high silicon content. Usually the silicon content is between 4.5-6.0%. It belongs to building materials, mechanical parts forging materials, welding materials; Low melting point, good corrosion resistance, with heat resistance, wear resistance characteristics.

Five series :5000 series aluminum alloy on behalf of 5052, 5005, 5083, 5A05 series. 5000 series aluminum rod belongs to the common series of alloy aluminum plate. The main element is magnesium, and the magnesium content is between 3-5%. It can also be called aluminum magnesium alloy. The main characteristics are low density, high tensile strength, high elongation, good fatigue strength, but can not be heat treatment. The weight of al-mg alloy in the same area is lower than other series. It is also widely used in conventional industry. In our country 5000 series aluminum plate belongs to one of the more mature aluminum plate series.

Six series :6000 series aluminum alloy on behalf of 6061 mainly contains magnesium and silicon two elements, so concentrated on the advantages of 4000 series and 5000 series 6061 is a cold treatment aluminum forging product, suitable for corrosion resistance, oxidation requirements of high applications. Good usability, easy coating, good processability.

Seven series :7000 series aluminum alloy on behalf of 7075 mainly contains zinc element. Also belongs to aviation series, is aluminum magnesium zinc copper alloy, is heat treatment alloy, belongs to super hard aluminum alloy, has good wear resistance. It also has good weldability, but poor corrosion resistance.

Eight series :8000 series of aluminum alloy is more commonly used for 8011 belongs to other series, most applications for aluminum foil, aluminum rod production is not commonly used.

Nine series :9000 series aluminum alloy is a spare alloy。