In 1825, German chemists extracted low-purity gray metallic aluminum.
In 1854, French chemists used sodium as a reducing agent to successfully produce metallic aluminum ingots. After a period of time, aluminum became an expensive material, and products made of aluminum could only be enjoyed by emperors and nobles.
In 1884, other metals were added to aluminum to make aluminum alloy materials, which were used in construction.
In 1908, an American company invented electrical aluminum alloy, which is characterized by high hardness and high copper content and is used in high-voltage transmission lines.
Later, cast aluminum alloys and high-strength aluminum alloys were invented one after another, and their application scope is also constantly expanding.