How about 7075 aluminum machinability?

Alloy 7050 aluminum sheet are now more commonly used for aerospace applications than 7075, especially in the 3-6 inch thickness range, due to its retention of strength in thicker sections. At Howard Precision Metals, we stock 7050 T7451 (AMS 4050) which provides better SCC resistance and excellent exfoliation resistance at slightly lower levels than that of 7050 T7651(AMS 4342). In addition, 7050 T7451 exhibits better toughness, corrosion resistance, and stress corrosion cracking resistance than alloy 7075. Since it is less quench sensitive than most other aerospace alloys, 7050 maintains its strength properties better than other high strength alloys in the thicker sections and also machines more consistently throughout the thickness of the heavier gauges. With these characteristics, it is no wonder why 7075 T7451 is the premium choice for applications in the aerospace and aircraft industries such as: bulkheads, fuselage frames, and wing skins.

7075 Aluminum is near the top of the list among aluminum alloys manufactured for the needs of consumer and industrial markets. Among other 7XXX alloys, alloy 7075 exists as a standard with a solid mix of properties suitable for aircraft and aerospace applications. In particular, this alloy utilized in various forms, including as 7075 aluminum bar, is well-suited for use in parts that endure high stress levels. The strength properties of alloy 7075 are beneficial for the manufacture of items such as aircraft structures, military grade rifles, bicycle parts and equipment, and plastic industry molds.

7075 is an aluminum alloy with zinc as the primary alloying element. It is strong, with a strength comparable to many steels, and has good fatigue strength and average machinability, but has less resistance to corrosion than many other Al alloys. Due to its high strength, low density, thermal properties and its ability to be highly polished, 7075 is widely used in mold tool manufacture.