EN AW-2024
EN AW-2024THE aerospace aluminum alloy — Al-Cu-Mg, introduced by Alcoa in 1931 as "Dural". Excellent fatigue resistance and damage tolerance. T3: UTS 400-470 MPa, good natural aging. Not weldable, poor corrosion resistance (often Alclad). Used for aircraft fuselage skins, wing skins, structural members under tension, ribs, and frames. Also: hydraulic valve bodies, gears, computer parts.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AA | USA | AA 2024 / UNS A92024 | A92024 | REF |
| 🇪🇺 | EN | Europe | EN AW-2024 / AlCu4Mg1 | EN AW-2024 | 100% |
Sources: AA, EN 573-3
Chemical composition comparison (wt%)
Side-by-side: EN AW-2024 (EN) (EN 573-3) vs EN AW-2024 / AlCu4Mg1 (EN) (EN 573-3)
| Element | EN AW-2024 (EN) | EN AW-2024 / AlCu4Mg1 (EN) | Overlap |
|---|---|---|---|
| Si | 0–0.5% | 0–0.5% | OK |
| Mn | 0.3–0.9% | 0.3–0.9% | OK |
| Cu | 3.8–4.9% | 3.8–4.9% | OK |
| Al | — | — | — |
| Mg | 1.2–1.8% | 1.2–1.8% | OK |
| Fe | 0–0.5% | 0–0.5% | OK |
Mechanical properties
T3
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 400–470 | MPa |
| Yield Strength | 270–320 | MPa |
| Elongation | 10–18 | % |
| Elastic Modulus | ≥ 73 | GPa |
| Density | ≥ 2.78 | g/cm3 |
Compatibility verdict
EN AW-2024 and EN AW-2024 / AlCu4Mg1: 100% composition match
Close equivalents but NOT identical.
Related materials
EN AW-6082
3.2315High-strength structural aluminium alloy in the Al-Mg-Si family. One of the strongest 6xxx series alloys due to manganese addition. Replaced 6061 in many European applications. Used for trusses, bridges, cranes, transport, scaffolding, and marine applications. Heat treatable (T6/T651).
EN AW-5083
3.3547The highest-strength non-heat-treatable aluminium alloy. Excellent corrosion resistance (especially seawater), good weldability. Standard alloy for shipbuilding, offshore, pressure vessels, cryogenic applications, and armour plate. Not for continuous service above 65°C under stress (SCC risk).
EN AW-2024
3.1355Classic high-strength aerospace aluminium alloy (Al-Cu-Mg). Excellent fatigue resistance — the standard choice for aircraft fuselage skins and wing tension members. Poor corrosion resistance and weldability. Often supplied with Alclad cladding for corrosion protection. In use since 1931.
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