Cast Copper-Nickel Alloys (Copper-Nickels, Cupro-Nickels) are copper alloys, containing 9-31% of nickel (Ni) as the major alloying element. Cast Copper-Nickel alloys are designated with the numbers from C96000 through C96999.
Cast Copper-Nickel alloys may contain up to 8% of tin (Sn), up to 1.4% of iron (Fe) , up to 1% of manganese (Mn), up to 1% of niobium (Nb) and up to 1.1% of beryllium (Be)as additional alloying elements.
Cast Copper-nickel-zinc alloys form a separate group called nickel silvers.
Cast Copper-Nickel-Zinc Alloys (Nickel Silvers) are copper alloys containing 12.5-25.5% of nickel (Ni) and 2.5-21% of zinc (Zn) as the major alloying elements. Cast Copper-Nickel-Zinc alloys are designated with the numbers from C97000 through C97999.
Wrought Copper-Nickel-Zinc alloys may contain 2.5-5% of tin (Sn) and 2-9.5% of lead (Pb) as additional alloying elements.
Cast Copper-Nickel alloys and most of cast Copper-Nickel-Zinc alloys have mono-phase structure (α-phase).
Iron, manganese and niobium are added to the cast Copper-Nickel alloys for increasing their hardness and strength.
Cast Copper-Nickel alloys are used for manufacturing pump bodies, bearings, bushings, steam fittings, boat part, valves and fittings resistant to corrosion in sea water, plastic molds tooling.
Cast Copper-Nickel alloys (Nickel Silvers) are used in decorative applications and for manufacturing marine furniture, sanitary fittings, fittings for food processing, valves, pumps, window hardware, components of musical instruments.
|UNS Designation||Trade mark||Ni,%||Fe,%||Zn,%||Sn,%||Others,%||Cu,%|
|C97300||Nickel Silver (12% Ni)||11.0-14.0||1.5 max.||17.0-25.0||1.5-3.0||Pb8.0-11.0||balance|
|C97600||Nickel Silver (20% Ni)||19.0-21.5||1.5 max.||3.0-9.0||3.5-4.5||Pb3.0-5.0||balance|
|C97800||Nickel Silver (25% Ni)||24.0-27.0||1.5 max.||1.0-4.0||4.0-5.5||Pb1.0-2.5||balance|