Aluminum is a kind of silver light metal with good ductility. Goods are often made into bars, sheets, foils, powders, ribbons, and filaments. A layer of oxide film that prevents metal corrosion is formed in moist air. Aluminum powder heated in the air can burn violently and give off a dazzling white flame. It is soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water. Its relative density is 2.70, melting point 660 ℃. Boiling point 2327 ℃. Aluminum is the third largest in the earth's crust, second only to oxygen and silicon, and is the most abundant metal element in the earth's crust. The development of the three important industries, aviation, architecture and automobile, requires that the material characteristics have the unique properties of aluminum and its alloys, which will greatly benefit the production and application of the new metal aluminum. Aluminum Materials Production are very extensive.