Copper Nickel Gasket

Cupro Nickel Washer Gaskets suppliers

Cuni Exhaust Gaskets Manufacturer, Copper Nickel 90/10 Flange Gasket, Cupro Nickel 70/30 O-Ring Gasket exporter in India

Cupro Nickel Gasket


Cupro Nickel Gasket

90-10 Cuni Gasket


90-10 Cuni Gasket

70-30 Copper Nickel Gasket


70-30 Copper Nickel Gasket

Cupro Nickel Gasket chemical composition is that of Cu 71.25-76.5, Ni 23.5-26.5, Pb ≤0.050, Mn ≤ 1.0, Zn ≤ 1.0 and Fe ≤ 0.20. The Thermal Expansion Co-efficient of Copper Nickel Gasket (@20-300°C/68-572°F) is 9.00 µin/in °F (16.2 µm/m °C). Copper Nickel Gasket are used in many applications that deal with cylinder cores, cooling water systems, fresh water preparation, control and load resistors, medical equipment, hydraulic lines, etc. The Elongation at Break of Copper nickel (rolled-H04 for flat products/hard drawn-H80 for tubing), is 11.00% and its Elongation at Break (annealed), is 40%.

The Molecular Formula of Cupro Nickel Flange Gasket is ‎CuNi Gasket. Copper nickel has very good characteristics of welding, brazing and soldering. 90-10 Cuni Gasket shows very good cavitation resistance. The Cu-Ni 90 / 10 Gaskets properties displayed are resistance to biofouling, resistance to macrofouling and resistance to seawater corrosion. This is inclusive of resistance to chlorides by way of stress corrosion cracking, crevice corrosion and pitting, even in climates that have hot temperatures. Cupro Nickel UNS C70600 Gasket displays excellent resistance to all kinds of water and this includes seawater. Copper nickel is also highly resistant to ammoniacal condensates, as well as acidic condensates. 70-30 copper nickel Gasket has excellent ductility, superb thermal conductivity, very good expansion characteristics, tensile strength and it is ductile even at cryogenic temperatures. The Machinability of Copper nickel (based on free-cutting brass = 100) is 20. The Poisson’s Ratio of Cuni Washer Gasket (C71500 annealed) is 0.325. UNS C70600 Gasket has big demand in pipes carrying seawater to the fire mains, offshore platforms, boat hull risers, heat exchangers, pipelines in shipbuilding, electrical resistors, etc.

Cupro Nickel Gasket

  • Contains 69% Copper, 30% Nickel and small amounts of Manganese, Zinc and Iron.
  • It is mostly used in sea water applications, where lesser resistant alloys rapidly deteriorate.
  • Maximum recommended temperature limit 500º F.

ISO Standard ISO3669-2017, ASTM E2934-10
Standard DIN  ANSI  BS  GB  ISO  JIS
Size Custom Size
Type Copper O-Ring Gasket, Copper Nickel Washer Gaskets, Exhaust Gaskets, Cupro Nickel Flange Gasket
Grades Copper Nickel 90/10 (C70600 ), Cupro Nickel 70/30 (C71500), UNS C70620, C7060X, C71520, C71640, C70400, C71000, C72200, C72900, C71300
Application High vacuum and UHV applications