The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.

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C18000 Chromium Nickel Silicon Copper RWMA Class 3 is a very hard heat treatable copper with moderate electrical conductivity. This alloy is utilized when a combination of very good mechanical strength along with moderate electrical and thermal conductivity are required. C18000 offers excellent value for the properties it offers. C18000 is a viable substitute for C17500 and C17510 in many applications. high hardness makes them ideal for electrodes for spot and seam welding of high resistance materials such as stainless steels, nichrome, inconel, and monel metal. As a casting, they are used for flash, butt and projection welding electrodes and fixtures. Other uses are welding gun components, seam welding bearing and other current carrying structural parts.