EN AW-2011
3.1655The original free-cutting aluminum alloy. Al-Cu with Pb+Bi additions for chip-breaking — the highest machinability rating of any Al alloy. Being phased out in EU for RoHS compliance (Pb content). Replaced by 6026 (Bi only) or 6082 in new designs. Still widely used in US/Asia. Used for high-volume screw machine products, precision bushings, fittings, and instruments.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AA | USA | AA 2011 / UNS A92011 | A92011 | REF |
| 🇪🇺 | EN | Europe | EN AW-2011 (AlCu6BiPb) | 3.1655 | 100% |
Sources: AA, EN 573-3
Chemical composition comparison (wt%)
Side-by-side: EN AW-2011 (AA) (EN 573-3) vs EN AW-2011 (AlCu6BiPb) (EN)
| Element | EN AW-2011 (AA) | EN AW-2011 (AlCu6BiPb) (EN) | Overlap |
|---|---|---|---|
| Si | 0–0.4% | — | — |
| Cu | 5–6% | — | — |
| Al | — | — | — |
| Fe | 0–0.7% | — | — |
| Pb | 0.2–0.6% | — | — |
| Bi | 0.2–0.6% | — | — |
| Zn | 0–0.3% | — | — |
Mechanical properties
T6 (solution treated + artificially aged)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 365–395 | MPa |
| Yield Strength | 290–310 | MPa |
| Elongation | 8–12 | % |
| Elastic Modulus | ≥ 70 | GPa |
| Density | ≥ 2.83 | g/cm3 |
T3
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 310–370 | MPa |
| Yield Strength | 260–290 | MPa |
| Elongation | 10–15 | % |
Compatibility verdict
EN AW-2011 and EN AW-2011 (AlCu6BiPb): 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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