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https://www.azom.com/article.aspx?ArticleID=8849 Chemically Refined Tough Pitch Copper Alloy (UNS C11030) Jul 15, 2013 - Copper and its alloys exhibit excellent thermal and electrical conductivity and good corrosion resistance. The UNS numbers C10100 to C13000 denote pure copper.... tough pitch copperchemicallyrefinedalloyuns