Also known as: GM+, GM-, GM.
GM has various meanings in the Military category. Discover the full forms, definitions, and usage contexts of GM in Military.
A copper-zinc alloy containing 95% copper and 5% zinc. While similar to deoxidized copper in physical properties, it is somewhat stronger and very ductile. It has thermal and electrical conductivity slightly better than half that of electrolytic copper and corrosion-resistance comparable to copper.
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