AA 7055 Aluminum Alloy
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Family: Aluminum Alloy
Zinc Alloy (Al-Zn). AA designation 7055.
Performance Ratings
Performance Radar
Composition
Mechanical Properties
| Tensile Strength | 654.0 MPa |
| Yield Strength | 595.0 MPa |
| Elongation | 10.0% |
| Hardness (Rockwell) |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Al | 87.294 |
| Cr | 0.004 |
| Cu | 2.19 |
| Fe | 0.061 |
| Mg | 2.14 |
| Mn | 0.006 |
| Si | 0.055 |
| Ti | 0.024 |
| Zn | 8.11 |
| Zr | 0.12 |
Where to Buy AA 7055 Aluminum Alloy
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Description
AA 7055 is one of the highest-strength commercial aluminum alloys available (yield strength >600 MPa in T77 temper), containing elevated zinc (~8% Zn), magnesium, and copper with zirconium for grain control. The T77 retrogression and re-aging (RRA) treatment achieves near-T6 strength with T73-level corrosion resistance, resolving the traditional strength-corrosion trade-off. It is used in upper wing skins of long-range commercial aircraft where maximum compression buckling resistance is required.