Hardness
Many customers are very concerned about the hardness when purchase of aluminum. Hardness is directly related to the chemical composition of the alloy. Secondly, different states also have a great influence. The hardness decrease from the 7 series, 2 series, 4 series, 6 series, 5 series, 3 series to 1 series.
Strength
Strength is an important factor that must be considered in product design. When aluminum alloy are used as components, appropriate alloys should be selected according to the pressure they bear. The strength of pure aluminum is the lowest, while 2 series and 7 series is the highest.
Corrosion resistance
Corrosion resistance of industrial aluminum profiles includes chemical corrosion resistance, stress corrosion resistance and other properties. Generally speaking, the corrosion resistance of 1 series of pure aluminum is the best, while that of 5 series is good, followed by that of 3 series and 6 series, and that of 2 series and 7 series is poor. Corrosion resistance should be selected according to the occasion.Under high - strength alloy corrosion environment, must use a variety of corrosion - resistant composite materials.
Processability
Processability includes forming performance and cutting performance. Because formability and state are concerned, after choose of aluminum alloy brand, also need to consider the strength of various states of the range. Usually, high strength material is not easy to form. If you want to bend the aluminum, drawing and other forming processing. After annealing, the material has the best formability, and the worst formability during heat treatment.
weldability
Most aluminum alloys have good weldability, especially some of the 5 series aluminum alloys, which are designed for welding. On the other hand, some of the 2 series and 7 series aluminum alloys are difficult to weld.
Decorative performance
Industrial aluminum used in decoration, or some specific situations, needs for its surface anodized, coating, such as processing, in order to obtain the corresponding color and surface structure. In general, if the aluminum materials with good corrosion resistance, are the anodize processing performance, surface treatment performance, coating performance also good.