chemical composition:
Aluminum Al: balance
Silicon Si: ≤0.50
Copper Cu: 1.2～2.0
Magnesium Mg: 2.0～3.0
Zinc Zn: 5.1～6.1
Manganese Mn: ≤0.15
Titanium Ti: ≤0.10
Chromium Cr: 0.16～0.30
Iron Fe: 0.000～0.500
Note: Individual: ≤0.05; Total ≤0.10[1] Remarks: LC9
Mechanical properties:
Tensile strength σb (MPa): ≥530
Conditional yield strength σ0.2 (MPa): ≥400
Elongation δ10 (%): ≥5
Characteristics and scope of application:
7A09 aluminum alloy is a high-strength alloy. The plasticity in the annealed and freshly quenched states is slightly lower than that of 2Y12 in the same state, and slightly better than 7A04. The plasticity of 7A09 aluminum alloy decreases significantly after quenching and artificial aging. The static fatigue, notch sensitivity, and stress corrosion properties of 7A09 aluminum alloy sheet are slightly better than 7A04.
