Aluminum is divided into raw aluminum and cooked aluminum. Aluminum with less than 98% raw aluminum is relatively brittle and hard, and can only be used as a cast product. Boiled aluminum is more than 98% aluminum, its nature is soft, and it can be rolled or stamped in many appliances. Our metal products is a professional manufacturer of aluminum castings and aluminum die castings, and has the ability to create high-quality products. Let me talk about the identification of the characteristics of inferior aluminum profiles. 1. The cost of aluminum profiles containing a large amount of miscellaneous aluminum and scrap aluminum in unqualified products has been greatly reduced, but it will lead to unqualified building aluminum profiles and seriously endanger the safety of construction projects. 2. Reduce the closing time. Inferior aluminum profiles greatly reduce the sealing time, reduce the loss of chemical reagents, and reduce costs, but the corrosion resistance of the profiles is also greatly reduced. 3. The national standard for thin oxide film thickness stipulates that the oxide film thickness of architectural aluminum profiles should not be less than 10um (micrometers). If the thickness is not enough, the surface of the aluminum profile is prone to rust and corrosion. In the random inspection, some aluminum profiles without production name, factory location, production license and qualification certificate only have an oxide film thickness of 2 to 4um, and some do not even have an oxide film. According to expert estimates, for every reduction in the thickness of the oxide film by 1um, the electricity cost per ton of profile can be reduced by more than 150 yuan. 4. Mixing a large amount of miscellaneous aluminum and scrap aluminum into aluminum profiles with unqualified chemical composition can greatly reduce the cost, but it will lead to unqualified chemical composition of building aluminum profiles and seriously endanger the safety of construction projects. During use, unqualified aluminum profiles will be deformed due to the influence of air, rain, etc. Inferior aluminum profiles are not only a tofu item, but also endanger our safety. Therefore, we must find a reliable factory.