Cu-ETP (CW004A)
2.0060Electrolytic tough pitch copper — 99.90% Cu minimum with 0.02-0.04% oxygen from electrolytic refining. The standard electrical-grade copper worldwide (IACS 101% conductivity). Highest electrical and thermal conductivity of any commercial copper grade. Easy to cold form, hot form, and solder/braze. Cannot be welded in oxidizing atmosphere (embrittlement from oxygen). Used for electrical busbars, wire, cable, transformer windings, circuit boards, heat exchangers, roofing, and plumbing. ASTM: C11000, UNS C11000.
Mechanical properties
Related materials
CuZn39Pb3
2.0401The most widely used free-cutting brass (machinability index 100%). Excellent for high-speed automatic lathe work. Used for turned parts, faucets, valves, fittings, screws, nuts, electrical connectors, and watch components. Also known as MS58.
CuSn8
2.1030Phosphor bronze with 8% tin. High mechanical strength, excellent wear resistance, good corrosion resistance (especially seawater). Self-lubricating sliding properties. Used for heavy-duty bearings, gears, worm wheels, springs, sliding elements, and connectors.
CuZn37
2.0321Lead-free alpha/alpha+beta brass (63% Cu, 37% Zn). Compromise between cold formability (CuZn35) and hot formability (CuZn40). The most widely used unleaded brass. Used for cartridge cases, radiator cores, lamp components, plumbing fixtures, and decorative hardware.
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