EN AW-1100
3.0257Commercially pure aluminum (99.0% min Al). Excellent corrosion resistance, highest thermal and electrical conductivity among common alloys, and outstanding formability. Very low strength — not for structural applications. Used for chemical equipment, heat exchangers, fin stock, name plates, reflectors, and food/pharmaceutical packaging.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AA | USA | AA 1100 / UNS A91100 | A91100 | REF |
| 🇪🇺 | EN | Europe | EN AW-1100 | 3.0257 | 100% |
Sources: AA, EN 573-3
Chemical composition comparison (wt%)
Side-by-side: EN AW-1100 (AA) (EN 573-3) vs EN AW-1100 (EN)
| Element | EN AW-1100 (AA) | EN AW-1100 (EN) | Overlap |
|---|---|---|---|
| Mn | 0–0.05% | — | — |
| Cu | 0.05–0.2% | — | — |
| Al | ≥ 99% | — | — |
| Si+Fe | 0–0.95% | — | — |
| Zn | 0–0.1% | — | — |
Mechanical properties
O Temper
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 75–105 | MPa |
| Yield Strength | 25–35 | MPa |
| Elongation | 35–45 | % |
| Elastic Modulus | ≥ 69 | GPa |
| Density | ≥ 2.71 | g/cm3 |
H14 Temper
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 110–150 | MPa |
| Yield Strength | 95–130 | MPa |
| Elongation | 9–20 | % |
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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