1100 is industrial pure aluminum with an aluminum content (mass fraction) of 99.00% and cannot be strengthened by heat treatment. It has high corrosion resistance, conductivity and thermal conductivity, low density, good plasticity, and can produce various aluminum materials through pressure processing, but its strength is low. The other process performance is basically the same as 1050A. 1100 is commonly used for products that require good formability, high corrosion resistance, and no need for high strength, such as food and chemical handling and storage equipment, sheet metal products, hollow hardware processed by drawing or spinning, welded combination keys, reflectors, nameplates, etc.