The production of aluminum alloy scaffolding, in which aluminum profiles are the most important raw materials, has been engaged in the production of aluminum scaffolding for more than 18 years, and has unique insights and rich experience in the purchase of aluminum profiles. The production of aluminum scaffolding, the purchase of the right profile is the key first step, let's talk about how to choose aluminum profiles.
Hardness is first and foremost related to the chemical composition of the alloy. Second, different states also have a greater impact. From the point of view of the highest hardness that can be achieved, 7 series, 2 series, 4 series, 5 series, 3 series, and 1 series are successively lowered.
Strength is an important factor that must be considered when designing a product. Especially 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 treated alloys have the highest strength. Hardness and strength have a certain positive relationship.
Corrosion resistance includes chemical corrosion resistance, electrochemical corrosion resistance, and stress corrosion resistance. In general, the 1st pure aluminum has the best corrosion resistance, and the 5 series performs well, followed by the non-straight line and the 6 line, and the 2 series and 7 series. The principle of corrosion resistance selection should be based on the application. When high-strength alloys are used in corrosive environments, various anti-corrosion composites must be used.
Processing properties include formability 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. If the aluminum material is to be bent, stretched, deep-drawn or the like, the formability of the material in the fully annealed state is optimal, and conversely, 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, the aluminum alloy with higher strength has better machinability, and the lower strength has poor machinability. Machinability of aluminum alloys is an important consideration for molds, joints, and other products that require machining.
Most aluminum alloys are welded without problems, especially some 5-series aluminum alloys, which are designed for welding considerations. In contrast, some 2 series and 7 series aluminum alloys are more difficult to weld.