Cupronickel Tubes

Sizes : 3mm O.D to 75mm O.D. with thickness of 0.5 mm to 20 mm wall


Sometimes called cupro-nickels, there exists a range of different copper nickel alloys that possess different properties and hence are suited to a range of different applications. Some of the better known copper nickel alloys include:

Copper with 10% nickel
> Copper with 30% nickel
All copper nickel alloys consist of only one phase as the copper nickel binary system exhibits complete solid solubility.

Key Properties

Properties vary with composition, however, some properties are outlined below.

> Copper 90/10 and Copper 70/30
> Outstanding resistance to corrosion, particularly sea water
> 70/30 is stronger and has superior resistance to impingement corrosion

Copper rich alloys are:

> Ductile
> Can be hardened only by cold working
> Good corrosion resistance
> Good strength
> Low temperature co-efficient of electrical resistance

The nickel content in these alloys also enables them to retain their strength at elevated temperatures compared to copper alloys without nickel.


Sea Water Condensor Systems And Desalination Plants Due to the good resistance to sea water corrosion, the 90/10 and 70/30 alloys are employed for sea water condenser systems and in desalination plants, as well as pipe work in chemical plants.

Automotive Applications

Due to the fact that the 90/10 alloy requires no surface protection and hence gives extra safety, this alloy is being increasingly employed for brake and hydraulic suspension systems and cooling systems in cars and commercial vehicles.

Marine Applications

The good resistance to biofouling and sea water corrosion resistance of the 90/10 and 70/30 alloys have lead to its use in applications such as cladding for ships’ hulls, legs of oil rig platforms and sea water intake screens.

Other Applications

Cooling circuits, ammunition, sea water corrosion-resistant assemblies, condenser tubes.
A Copper Nickel Alloy in the ratio of 90/10 that has very high erosion and corrosion resistance. It has very high weld ability, easy for installation and are used for Condensers, Ship building, Refineries etc.

70/30 Cupro Nickel Tubes (Size range: 3 mm OD to 50mm OD with thickness of 0.5 mm to 20 mm wall) For the mechnical properties add EN 1057 after ASTM B 280 Tensile strength 220 MPa, Elongation - min 40 and Hardness - annealed.