The grades in the aluminum alloy are representative. The following is an example of the grade of 7075T651 aluminum plate. The first 7 represents the group of aluminum and aluminum alloys – aluminum-zinc-magnesium alloys. Aluminum and aluminum alloy groups are divided into nine categories. Among them, aluminum and aluminum alloys of 1, 3, 5, 6, and 7 series are the main ones, and other series are rarely used in actual use.

The first category: 1 series: industrial pure aluminum

The second category: 2 series: aluminum copper alloy

The third category: 3 series: aluminum-manganese alloys

The fourth category: 4 series: aluminum silicon alloy

The fifth category: 5 series: aluminum-magnesium alloys

The sixth category: 6 series: aluminum magnesium silicon alloy

The seventh category: 7 series: aluminum-zinc-magnesium-copper alloys

The eighth category: 8 series: other alloys

Class 9: Series 9: Spare Alloys