What we can say is that even though the 7075 aluminum extrusion belongs to the top tier of high-strength alloys, it is affordable. The price of the material is a result of several factors. Copper and zinc are added to enhance the strength of the material. Also part of the cost factor is the intricate indirect extrusion for seamless tube the product has to undergo before it becomes ready for sale. There are various closely controlled processes, including heat treatment. All in all, the 7075 seamless tube is highly reliable, and therefore justifiable to be a bit pricier than many other alternative materials.