The
7050 seamless aluminum pipe tube increases the zinc and copper content, increases the proportion of zinc to magnesium, and replaces chromium as a grain refiner with zirconium, and greatly reduces the content of iron and silicon impurities. These improvements and over-aging treatments make the 7050 excellent overall properties such as good toughness, high fatigue strength and good resistance to stress corrosion while maintaining a high strength level. Another outstanding advantage of the
7050 seamless aluminum pipe tube is its good hardenability.
The development of the 7050 type alloy is that the purity is getting higher and higher. For example, the Si+Fe of the 7250 alloy is only equivalent to 67% of the 7050 alloy, especially the Si content. The 7050 alloy itself is a clean alloy with a much lower content of Si and Fe than the traditional 7075 alloy. Therefore, their impurity content is less than that of the 7075 alloy.
The
7050 seamless aluminum pipe tube has a melting temperature of 710--750 degrees Celsius and a casting temperature of 700--730 degrees Celsius. The alloy forming process, heating temperature and time are comparable to those of the 7075 alloy. It is not suitable for welding, and can be used for resistance welding. The surface treatment process of the alloy is the same as that of the general aluminum alloy, and the alloy has good machinability.
