AA 2124 Aluminum Alloy
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Family: Aluminum Alloy
Copper Alloy (Al-Cu). AA designation 2124.
Overview
AA 2124 is a high-purity variant of 2024 in which iron and silicon impurities are tightly controlled to raise fracture toughness and fatigue performance in thick plate. It keeps the 3.8–4.9% copper base with magnesium and manganese and is normally used in the T851 temper. The cleaner microstructure suits it to aircraft bulkheads, fuselage frames, and other structural components where superior damage tolerance is the priority.
Performance Ratings
Performance Radar
Composition
Mechanical Properties
| Tensile Strength | 420.5 MPa |
| Yield Strength | 252.0 MPa |
| Elongation | 86.5% |
| Hardness (Rockwell) |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Al | 93.13 |
| Cr | 0.06 |
| Cu | 4.4 |
| Fe | 0.18 |
| Mg | 1.46 |
| Mn | 0.64 |
| Ni | 0.015 |
| Si | 0.2 |
| Ti | 0.01 |
| Zn | 0.25 |
Where to Buy AA 2124 Aluminum Alloy
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Description
AA 2124 is a high-purity variant of 2024 with tighter control of iron and silicon impurities, resulting in improved fracture toughness and fatigue performance in thick plate form. The alloy contains 3.8–4.9% copper with magnesium and manganese, and is typically used in the T851 temper. Applications include aircraft bulkheads, fuselage frames, and structural components requiring superior damage tolerance.