Alloy is an unincorporated community in Fayette County, West Virginia, United States. Alloy is located along the Kanawha River and U.S. Route 60, 5 mi southwest of Gauley Bridge. Alloy was originally known as Boncar (anagram of carbon) until the mid-1930s. Both the original placename and the current placename refer to the ferroalloy plant that still operates here (producing about 30% of all the silicon metal in North America). The metals plant was originally the Electro Metallurgical Co.; a unit of Union Carbide and Carbon Corporation. Alloy has a post office with ZIP code 25002.

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