It is strong, with a strength comparable to many steels and has good fatigue strength and average machinability. It is produced in many tempers, some of which are 7075-0, 7075-T6, 7075-T651.7050 Aluminum
Aluminum 7050 has high mechanical properties, high fracture toughness, along with a high resistance and exfoliation and stress corrosion cracking.2000 Aluminum
The aluminum 2000 series are alloyed with copper and can be precipitation hardened to strengths comparable to steel. Formerly referred to duralumin.