There are many classification methods for deformed aluminum alloys. At present, most countries in the world usually classify them according to the following three methods.
⑴ According to the alloy state diagram and heat treatment characteristics, it is divided into two categories: heat-treatable strengthened aluminum alloys and non-heat-treatable strengthened aluminum alloys. Non-heat-treatable strengthened aluminum alloys (such as pure aluminum, Al-Mn, Al-Mg, Al-Si series alloys) and heat-treatable strengthened aluminum alloys (such as: Al-Mg-Si, Al-Cu, Al-Zn-Mg series alloy).
⑵ According to alloy properties and uses, it can be divided into: industrial pure aluminum, brilliant aluminum alloy, cutting aluminum alloy, heat-resistant aluminum alloy, low-strength aluminum alloy, medium-strength aluminum alloy, high-strength aluminum alloy (duralumin), ultra-high-strength aluminum Alloys (superhard aluminum), forged aluminum alloys and special aluminum alloys, etc.
⑶ According to the main elements contained in the alloy, it can be divided into: industrial pure aluminum (1××× series), Al-Cu alloy (2××× series), Al-Mn alloy (3××× series), Al- Si alloy (4××× series), AL-Mg alloy (5××× series), Al-Mg-Si alloy (6××× series), Al-Zn-Mg alloy (7××× series), Al-other element alloys (8××× series) and spare alloy groups (9××× series).
These three classification methods have their own characteristics, and sometimes overlap and complement each other. In industrial production, most countries classify according to the third method, that is, according to the 4-digit numerical method of the main element composition contained in the alloy. This classification method can more essentially reflect the basic properties of the alloy, and is also convenient for coding, memory and computer management.
