A7 aluminum ingot is a high-purity aluminum ingot, generally with an aluminum purity of more than 99.7%, which is relatively high in purity and is often used in the production of aluminum alloy materials, aluminum plates, aluminum profiles, etc.

A8 aluminum ingot is an aluminum alloy ingot, with an aluminum purity of more than 99.8% and a small amount of copper, manganese and other alloy elements. It has high strength and corrosion resistance and is often used in automotive parts, aerospace, construction, etc.

A9 aluminum ingot is an aluminum alloy ingot, with an aluminum purity of more than 99.9% and a certain proportion of copper, manganese, magnesium and other alloy elements. It has high strength and corrosion resistance and is often used in aerospace, automotive parts, construction, electronics and other industries.