Duralumin is a trade name for one of the earliest types of age-hardenable aluminium–copper alloys. The term is a combination of Dürener and aluminium. Its use as a trade name is obsolete. Today the term mainly refers to aluminium-copper alloys, designated as the 2000 series by the international alloy designation system (IADS), as with 2014 and 2024 alloys used in airframe fabrication.

ड्यूरालुमिन एक प्रमुख मिश्र धातु है। इसमें 95% एल्युमिनियम, 4% कापर, 0.5% मैंगनीज तथा 0.5% मैंग्नेसियम होता है। वायुयान तथा हल्के औजारों को बनाने में इसका उपयोग होता है।