In the aluminum alloy grade is representative of the meaning, the following according to 7075t651 aluminum plate grade as an example. The first 7 represents aluminum and aluminum alloy category-Al-Zn-Mg alloy. Aluminum and aluminum alloy groups are divided into nine categories.
Among them, 1, 3, 5, 6, 7 Series of aluminum, aluminum alloy-based, the others are used in the actual use of less chance.
Category I: 1 Series: Industrial Pure Aluminum
Type II: 2 Series: Aluminum Copper series Alloy
Category III: 3 Series: Aluminum Manganese alloy
Class Fourth: 4 series: Al-Si series alloy
Class Fifth: 5 Series: Al-Mg series alloy
Class Sixth: 6 Series: Al-Mg-Si series alloy
Class Seventh: 7 Series: Al-Zn-Mg-cu-Series alloy
Class Eighth: 8 Series: Other alloys Class Nineth: 9 Series: Spare alloy