This is the most common type of aluminum ingot, which is mainly used for remelting and processing into various aluminum alloy materials or products. According to national standards, remelted aluminum ingots are classified into grades of Al99.85, Al99.70, Al99.60, Al99.50 and Al99.00 according to their chemical composition. The numbers represent the minimum aluminum content. For example, Al99.85 means that the aluminum content is not less than 99.85% and the total content of other impurities does not exceed 0.15%. This type of aluminum ingot is of high purity and has good electrical and thermal conductivity, corrosion resistance and processing properties. It is widely used in construction, automotive, electronics and packaging industries.