Wiktionary
magnalium
n. An alloy of 75% aluminium with about 25% magnesium.
Wikipedia
Magnalium
Magnalium is an aluminium alloy with magnesium and small amounts of nickel and tin. Some alloys, intended for particular uses at the cost of poor corrosion resistance, may consist of up to 50% magnesium. It finds use in engineering and pyrotechnics.
Usage examples of "magnalium".
It was a beautiful machine, made of thick magnalium, about thirtytwo feet long, shaped like a U.