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Copper-clad steel
Copper-clad steel (CCS), also known as copper-covered steel or the trademarked name Copperweld is a bi-metallic product, mainly used in the wire industry that combines the high mechanical resistance of steel with the conductivity and resistance to corrosion of copper.
It is mainly used for grounding purposes, drop wire of telephone cables,〔("The History of Copper Clad Wire" (April 29, 1911) ''Telephony'' Vol.60 No.17, Telephone Publishing Corporation, Chicago and New York )〕 and inner conductor of coaxial cables, including thin hookup cables like RG174, and CATV cable.
==History==
The first recorded attempt to make copper clad steel wire took place in the early 1860s, according to the ''Copper Clad Handbook'', issued by the Duplex Metals Co., Chester, PA at the turn of the 20th century. Although for over 100 years people had been suggesting various ways of uniting copper and steel, it was not until the period mentioned that Farmer and Milliken tried wrapping a strip of copper about a steel wire. American engineers in 1883 and again in the 1890s made attempts to produce a copper-steel wire, in one instance at least, by electro-plating copper on steel.〔
The Duplex Metals Co. traces its beginning to John Ferreol Monnot between 1900 and 1905. He had been very much interested in the work of Mr. Martin in Paris, and, as the ''Handbook says'': "After several years devoted to experimenting, organized the Duplex Metals Company. Prior to his discovery of the process under which this company operates in producing its copper clad, probably almost every other possible way of welding copper and steel together had been tried by Mr. Monnot, but found useless for the purpose."〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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