Hardness: Many customers are very concerned about buying aluminum. The hardness is directly related to the chemical composition of the alloy. Secondly, different states also have a large influence. From the perspective of the highest hardness that can be achieved, 7 series, 2 series, 4 series, 6 series, 5 series, 3 series, and 1 series are successively lowered.
Strength: Strength is an important factor that must be considered when designing a product. When an aluminum alloy component is used as a component, the appropriate alloy should be selected according to the pressure it is subjected to. Pure aluminum has the lowest strength, while the 2 and 7 series heat treatment alloys have the highest degree, and the hardness and strength have a certain lower phase relationship.
Corrosion resistance: Corrosion resistance includes chemical corrosion and stress corrosion resistance. In general, 1 series of pure aluminum has the best corrosion resistance, 5 lines perform well, followed by 3 series and 6 series, and 2 series and 7 series are inferior. The principle of corrosion resistance selection should be based on the application. In the corrosive environment of high-strength alloys, various anti-corrosion composite materials must be used.
Processability: Processing properties, insert forming properties and cutting performance. Since the formability is related to the state, after selecting the aluminum alloy grade, it is necessary to consider the strength range of various states, and usually the material having high strength is not easily formed. It is necessary to bend, stretch, deep-draw, etc. the aluminum material, and the formability of the material in the annealed state is the best. On the contrary, the formability of the material in the heat treatment state is the worst. The machinability of aluminum alloys is poor, and the machinability of molds and mechanical parts is better. Conversely, the low-strength machinability is poor. For products requiring cutting, such as molds and machine parts, the machinability of aluminum alloys is important. Considerations.
Weldability: Most aluminum alloys have no problem in weldability. In particular, some 5 series aluminum alloys are designed for welding considerations. Relatively speaking, some 2 series and 7 series aluminum alloys are difficult to weld.
Decorative performance: When aluminum is applied to decoration or some specific occasions, it needs to be anodized, painted and processed to obtain the corresponding color and surface structure. At this time, its decoration should be considered, generally In other words, the material with good corrosion resistance has excellent anode treatment performance, surface treatment performance and coating performance.