EN AW-6061
3.3211THE US structural aluminum alloy — AlMg1SiCu. Good strength (UTS 290 T6), excellent corrosion resistance, and good weldability. THE default choice in North America for structural and machined parts. Cu addition gives slightly better strength than 6082 in some tempers but slightly worse corrosion. Used for structural frames, bicycle frames, aircraft fittings, marine hardware, and general machined components.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AA | USA | AA 6061 / UNS A96061 | A96061 | REF |
| 🇪🇺 | EN | Europe | EN AW-6061 (AlMg1SiCu) | 3.3211 | 100% |
| 🇯🇵 | JIS | Japan | A6061 | — | 95% |
Sources: ASTM B209, EN 755-2, JIS H4000
Chemical composition comparison (wt%)
Side-by-side: EN AW-6061 (AA) (EN 573-3) vs A6061 (JIS)
| Element | EN AW-6061 (AA) | A6061 (JIS) | Overlap |
|---|---|---|---|
| Si | 0.4–0.8% | — | — |
| Mn | 0–0.15% | — | — |
| Cr | 0.04–0.35% | — | — |
| Cu | 0.15–0.4% | — | — |
| Al | — | — | — |
| Ti | 0–0.15% | — | — |
| Mg | 0.8–1.2% | — | — |
| Fe | 0–0.7% | — | — |
| Zn | 0–0.25% | — | — |
Mechanical properties
T6 (solution treated + artificially aged)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 260–310 | MPa |
| Yield Strength | 240–275 | MPa |
| Elongation | 8–12 | % |
| Hardness HB | 85–100 | HB |
| Elastic Modulus | ≥ 69 | GPa |
| Density | ≥ 2.7 | g/cm3 |
| Tensile Strength | 290–310 | MPa |
| Yield Strength Rp0.2 | 240–270 | MPa |
| Elongation A | 8–12 | % |
| Hardness HB | 90–105 | HB |
O (annealed)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 110–150 | MPa |
General
| Property | Value | Unit |
|---|---|---|
| Density | 2.7 | g/cm³ |
Compatibility verdict
EN AW-6061 and A6061: 95% 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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