Straight scoop on scandium.(CROSSFIRE: LETTERS TO GUNS)(Letter to the editor)

Guns Magazine | August 1, 2007| | Copyright

As a professional metallurgist who's developed strong aluminum alloys for 40 years, I'd like to clarify the term "scandium" as applied to certain strong, light, gun frames. Such "scandium" frames are not made from this expensive rare earth element with mediocre mechanical properties. Rather, the frames are made from strong aluminum alloys whose major strengthening elements include zinc, magnesium and copper, which may total more than 10 percent of the alloy.

Scandium is added only in small amount, perhaps about 0.2 percent, to prevent recrystallization of the ...

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