EN AW-5059
EN AW-5059Highest-strength non-heat-treatable marine aluminum — Mg 5.0-6.0% + Mn 0.6-1.2%. ~15% stronger than 5083 in equivalent temper. Developed by Corus (now Tata Steel) specifically for fast ferry and naval vessel hulls. Trade name: Alustar. Excellent seawater resistance and weldability. Used for high-speed craft hulls, naval vessels, LNG containment, and offshore structures where 5083 strength is insufficient.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AA | USA | AA 5059 / UNS A95059 | A95059 | REF |
| 🇪🇺 | EN | Europe | EN AW-5059 / AlMg5.5Mn | EN AW-5059 | 100% |
Sources: AA, EN 573-3
Chemical composition comparison (wt%)
Side-by-side: EN AW-5059 (EN) (EN 573-3) vs EN AW-5059 / AlMg5.5Mn (EN) (EN 573-3)
| Element | EN AW-5059 (EN) | EN AW-5059 / AlMg5.5Mn (EN) | Overlap |
|---|---|---|---|
| Mn | 0.6–1.2% | 0.6–1.2% | OK |
| Al | — | — | — |
| Mg | 5–6% | 5–6% | OK |
| Zn | 0.2–0.7% | 0.2–0.7% | OK |
| Zr | 0.05–0.25% | 0.05–0.25% | OK |
Mechanical properties
H321
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 330–390 | MPa |
| Yield Strength | 200–270 | MPa |
| Elongation | 10–16 | % |
| Elastic Modulus | ≥ 72 | GPa |
| Density | ≥ 2.66 | g/cm3 |
Compatibility verdict
EN AW-5059 and EN AW-5059 / AlMg5.5Mn: 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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