Aluminum 7050: 7050 is a high strength heat treatable alloy with high strength and resistance to exfoliation corrosion and stress corrosion cracking performance. Commonly used in aircraft structures for plate extrusions, forged parts and forging parts. Manufacture of such parts of the alloy requirements are: exfoliation corrosion resistance and resistance to stress corrosion cracking, fracture toughness and fatigue resistance are stronger. Chemical composition of zinc (Zn) 5.7 ~ 6.7 silicon (Si) ≤0.12 iron (Fe) 0.000 ~ 0.150 Manganese (Mn) ≤0.10 magnesium 1.9 to 2.6 titanium (Ti) ≤0.06 copper (Cu) 2.0 ~ 2.6 Other properties (Mg) Density: 20 ℃ (68 ℉) when 2.83g / cm3 (0.102lb / in3). Annealing temperature 415 ℃ (775 ℉) solution temperature 475 ℃ (890 ℉) aging temperature 120-175 ℃ (250-350 ℉)