1. Aluminum profile hardness: First of all, the hardness of
aluminum profile is directly related to the chemical composition of the alloy. Secondly, different conditions also have a greater impact. In terms of the highest hardness that can be achieved, the 7 series, the 2 series, the 4 series, the 5 series, the 3 series, and the 1 series decrease in order. 2, the strength of aluminum profile The strength of aluminum profile is an important factor that must be considered in product design, especially when aluminum alloy components are used as components, appropriate alloys should be selected according to the pressure they bear. Pure aluminum has the lowest strength, while the 2 series and 7 series heat-treated alloys have the highest strength. There is a certain positive relationship between hardness and strength. 3, corrosion resistance corrosion resistance includes chemical corrosion resistance, electrochemical corrosion resistance, stress corrosion resistance and other properties. Generally speaking, pure aluminum of the 1 series has the best corrosion resistance, the 5 series performs well, followed by the non-curved straight series and the 6 series, and the 2 series and 7 series are inferior. The selection principle of corrosion resistance should be determined according to its use occasion. High-strength alloys are used in corrosive environments, and various anti-corrosion composite materials must be used. 4. Machining performance Machining performance includes forming performance and cutting performance. Because formability is related to state, after selecting aluminum alloy grades, the strength range of various states must be considered. Generally, high-strength materials are not easy to form. If the aluminum material is to be bent, stretched, and deep-drawn, the formability of the material in the fully annealed state is the best, on the contrary, the formability of the material in the heat-treated state is the worst. The cutting performance of aluminum alloy has a great relationship with the alloy composition. Generally, aluminum alloys with higher strength have better machinability, and on the contrary, lower strength ones have worse machinability. For products that require cutting, such as molds and parts, the machinability of aluminum alloy is an important consideration. 5. Welding performance There is no problem in welding most aluminum alloys, especially some 5 series aluminum alloys, which are specially designed for welding considerations. Relatively speaking, some 2 series and 7 series aluminum alloys are more difficult to weld.
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