EN AW-7049
EN AW-7049Ultra-high-strength Al-Zn-Mg-Cu alloy — Zn 7.2-8.4%, higher than 7075 (5.1-6.1%). T73 temper: UTS 510-570 MPa with improved stress corrosion resistance over T6. Used for aircraft structural forgings (landing gear, wing spars), missile components, and high-strength fasteners. Developed for thick-section forgings where 7075-T6 SCC resistance is insufficient.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AA | USA | AA 7049 / UNS A97049 | A97049 | REF |
| 🇪🇺 | EN | Europe | EN AW-7049 / AlZn8MgCu | EN AW-7049 | 100% |
Sources: AA, EN 573-3
Chemical composition comparison (wt%)
Side-by-side: EN AW-7049 (EN) (EN 573-3) vs EN AW-7049 / AlZn8MgCu (EN) (EN 573-3)
| Element | EN AW-7049 (EN) | EN AW-7049 / AlZn8MgCu (EN) | Overlap |
|---|---|---|---|
| Mn | 0–0.5% | 0–0.5% | OK |
| Cr | 0.1–0.22% | 0.1–0.22% | OK |
| Cu | 1.2–1.9% | 1.2–1.9% | OK |
| Al | — | — | — |
| Zn | 7.2–8.4% | 7.2–8.4% | OK |
| Mg | 2–3% | 2–3% | OK |
Mechanical properties
T73
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 510–570 | MPa |
| Yield Strength | 430–500 | MPa |
| Elongation | 7–10 | % |
| Elastic Modulus | ≥ 72 | GPa |
| Density | ≥ 2.84 | g/cm3 |
Compatibility verdict
EN AW-7049 and EN AW-7049 / AlZn8MgCu: 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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