Aluminum is a chemical element. Its chemical symbol is Al, and its atomic number is 13. The content of aluminum in the earth's crust ranks third after oxygen and silicon, and is the most abundant metallic element in the earth's crust. Among them, the metal variety is second only to steel, which is the second largest metal variety. By the end of the 19th century, aluminum had become a competitive metal for engineering applications and was popular. The development of the three important industries of aviation, construction and automobiles requires material properties with the unique properties of aluminum and its alloys, which is of great benefit to the production and application of this new type of aluminum metal. Aluminum is used in a wide range of applications.
Pure aluminum is very soft, has low strength, and has good ductility. It can be drawn into long filaments and rolled into foils, which are used in a large number of wires, cables, radio industry, and packaging industry. It has about two-thirds the conductivity of copper, but since its density is only one-third that of copper, aluminum has about the conductivity of copper compared to aluminum and copper wires of equal mass and length. Multiply, the price is lower than copper.
Aluminum products are a general term for daily necessities and industrial products that are made of aluminum alloy as the main raw material.
Aluminum alloy is a general term for aluminum-based alloys. The main alloying elements are copper, silicon, magnesium, zinc, and manganese. The secondary alloying elements are nickel, iron, titanium, chromium, lithium, etc. Aluminum alloy has low density, but relatively high strength, close to or exceeding high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is second only to steel.
