English http://en.wikipedia.org/wiki/List_of_copper_alloys https://en.wikipedia.org/wiki/List_of_copper_alloys base metal alloys http://en.wikipedia.org/wiki/List_of_copper_alloys http://en.wikipedia.org/wiki/List_of_copper_alloys Wikipedia article Wikipedia knows English copper alloys base metal alloys copper alloy copper alloys copper alloy its alloys