Pure aluminum vs aluminum alloy

What is the difference between pure aluminum and aluminum alloy

What is the difference between pure aluminum and aluminum alloy? The difference between pure aluminum and aluminum alloy is mainly the difference in aluminum content and performance.

First. The aluminum content of pure aluminum and aluminum alloy is different

Industrial pure aluminum is generally defined as aluminum with a purity of 99.0% to 99.9%, and in China it is defined as aluminum with a purity of 98.8% to 99.7%. Among them, the main impurities in pure aluminum include iron and silicon. Pure aluminum is divided into two categories: smelted products and pressure processed products. The former is represented by the chemical composition Al, and the latter is represented by the Chinese pinyin LV (aluminum, industrial).

Pure aluminum vs aluminum alloy

Second. The properties of pure aluminum and aluminum alloy are different

• 1, they have similar densities. They are all so-called lightweight materials with a density of aluminum around 2.7g/cm3.
• 2, aluminum alloys usually use alloying elements such as copper, zinc, manganese, silicon, and magnesium. It was invented by German Alfred Wilm in the early 20th century, which greatly helped the development of aircraft. After World War I, the composition of German aluminum alloys was listed as a state secret. Compared with ordinary carbon steel, it is lighter and has corrosion resistance, but its corrosion resistance is not as good as that of pure aluminum. A protective oxide layer forms on the surface of aluminum alloys in a clean, dry environment.
• 3, silver-white light metal. malleable. Commodities are often made into rods, flakes, foils, powders, ribbons and filaments. In humid air, an oxide film can be formed to prevent metal corrosion. Aluminum powder and aluminum foil can burn violently when heated in the air, and emit a blinding white flame. Soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solution, insoluble in water. The relative density is 2.70. The melting point of aluminum is 660°C. The boiling point is 2327°C. The content of aluminum in the earth’s crust is second only to oxygen and silicon, ranking third, and is the most abundant metal element in the earth’s crust. The development of the three important industries of aviation, construction, and automobile requires that the material properties have the unique properties of aluminum and its alloys, which greatly facilitates the production and application of this new metal aluminum. The application is extremely extensive.
• 4, but pure aluminum, its toughness is relatively poor, relatively soft, and easy to deform. Aluminum alloy, although the density is similar, is tough and not easily deformed, so it can be used as a flying material.

Pure aluminum and aluminum alloys are very different in chemical composition and performance, and there are also great differences between different alloys;

Which alloy model to choose depends on the specific use environment and application. If you have any other questions, please contact us.