AA 2198 Aluminum Alloy
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Family: Aluminum Alloy
Copper Alloy (Al-Cu). AA designation 2198.
Performance Ratings
Performance Radar
Composition
Mechanical Properties
| Tensile Strength | 157.0 MPa |
| Yield Strength | 452.0 MPa |
| Hardness (Rockwell) |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Ag | 0.285 |
| Al | 94.75 |
| Cr | 0.05 |
| Cu | 3.31 |
| Fe | 0.053 |
| Li | 0.98 |
| Mg | 0.32 |
| Mn | 0.04 |
| Ni | 0.01 |
| Pb | 0.01 |
| Si | 0.03 |
| Ti | 0.028 |
| Zn | 0.02 |
| Zr | 0.14 |
Where to Buy AA 2198 Aluminum Alloy
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Description
AA 2198 is a modern aluminum-copper-lithium alloy (2.9–3.5% Cu, 0.8–1.1% Li) designed to replace 2024 in fuselage skin applications. It offers a density reduction of approximately 3–4%, improved fatigue crack growth resistance, and good corrosion resistance compared to older Al-Cu alloys. The alloy is used in commercial aircraft fuselage skins, floor panels, and lower wing skin panels.