EN AW-2219
EN AW-2219THE weldable aerospace Al-Cu alloy — Cu 5.8-6.8%, no Mg. Unique among 2xxx: fully weldable (unlike 2024/2014). Retains strength from -250°C to +315°C. Used for Space Shuttle external tank, Saturn V fuel tanks, and cryogenic vessels. T87: UTS 455 MPa. Also used for supersonic aircraft skins and high-temperature structural applications up to 315°C.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AA | USA | AA 2219 / UNS A92219 | A92219 | REF |
| 🇪🇺 | EN | Europe | EN AW-2219 / AlCu6Mn | EN AW-2219 | 100% |
Sources: AA, EN 573-3
Chemical composition comparison (wt%)
Side-by-side: EN AW-2219 (EN) (EN 573-3) vs EN AW-2219 / AlCu6Mn (EN) (EN 573-3)
| Element | EN AW-2219 (EN) | EN AW-2219 / AlCu6Mn (EN) | Overlap |
|---|---|---|---|
| Mn | 0.2–0.4% | 0.2–0.4% | OK |
| V | 0.05–0.15% | 0.05–0.15% | OK |
| Cu | 5.8–6.8% | 5.8–6.8% | OK |
| Al | — | — | — |
| Ti | 0.02–0.1% | 0.02–0.1% | OK |
| Zr | 0.1–0.25% | 0.1–0.25% | OK |
Mechanical properties
T87
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 440–475 | MPa |
| Yield Strength | 345–395 | MPa |
| Elongation | 6–10 | % |
| Elastic Modulus | ≥ 73 | GPa |
| Density | ≥ 2.84 | g/cm3 |
Compatibility verdict
EN AW-2219 and EN AW-2219 / AlCu6Mn: 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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