Alloy 7021
(UNS A97021) W Nr.3.4345
| Chemical composition | Al | Zn | Mg | Cu | Cr | Fe | Si | Mn | Ti | Others |
|---|---|---|---|---|---|---|---|---|---|---|
| % Present (Max) | Balance | 5.0 – 6.0 | 1.2 – 1.8 | 0.10 | 0.05 – 0.20 | 0.50 | 0.40 | 0.30 | 0.20 | 0.05 each / 0.15 total |
Alloy 7021 is a high‑strength zinc-magnesium aluminium alloy providing good toughness and wear resistance. It is less common in aerospace but used in structural and precision components where strength is a priority.
Aluminium 7021 is typically specified to EN/BS standards rather than dedicated AMS aerospace specs (i.e., there’s no direct AMS aluminium standard for this grade in common aerospace usage).
Note: Values are in accordance with EN 10088 specifications. Actual mill certs available upon request.