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 ASTM specification references.

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C18200 Chromium Copper RWMA Class 2 is a heat treatable, corrosion resistant alloy which combines high electrical conductivity with high strength. Class 2 chrome copper is a superior resistance welding electrode material specifically recommended for high-level production spot welding and seam welding of clean mild steels, low alloy steels, low conductivity brasses, and bronzes. Typical applications include projection welding dies, seam welder shafts and bearings, flash and butt welding dies, resistance welding electrodes, spot welding tips, seam welding wheels, electrode holder jaws, cable connectors, current carrying structural members, electrical switch gears and electrical and thermal conductors requiring greater strength than copper.