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duralumin

[doo-ral-yuh-min, dyoo-] /dʊˈræl yə mɪn, dyʊ-/
noun
1.
an alloy of aluminum that is 4 percent copper and contains small amounts of magnesium, manganese, iron, and silicon: used for applications requiring lightness and strength, as in airplane construction.
Origin
1905-1910
1905-10; < Latin dūr(us) hard + alumin(um)
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for duralumin

Duralumin

/djʊˈræljʊmɪn/
noun
1.
trademark a light strong aluminium alloy containing 3.5–4.5 per cent of copper with small quantities of silicon, magnesium, and manganese; used in aircraft manufacture
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for duralumin

strong, hard, lightweight alloy of aluminum, widely used in aircraft construction, discovered and patented in 1910 by Alfred Wilm, a German metallurgist; it was originally made only at Duren in Germany. The original composition has been varied for particular applications; it may contain about 3 or 4 percent copper, 12 to 1 percent manganese, 12 to 1 12 percent magnesium, and, in some formulations, some silicon. After heat treatment and aging, these alloys are comparable to soft steel in strength

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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