EN AW-7020
3.4335Weldable high-strength 7xxx aluminium — unique because most 7xxx alloys have poor weldability. Low Cu content gives better SCC resistance than 7075. Good mechanical property recovery after welding. Used for railway carriages, military bridges, mobile cranes, aircraft freight containers, and structural transport components.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AA | USA | AA 7020 | A97020 | REF |
| 🇪🇺 | EN | Europe | EN AW-7020 / AlZn4.5Mg1 | 3.4335 | 100% |
| 🇬🇧 | BS | United Kingdom | H17 | — | 95% |
| 🇫🇷 | AFNOR | France | A-Z5G | — | 93% |
Sources: ASTM B221, EN 573-3, BS 1474, AFNOR
Mechanical properties — Pro
T6 (solution treated + artificially aged)
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
| Elastic Modulus | ||
| Density |
T5
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | ||
| Yield Strength |
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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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