Cupro Nickel Tubes

Commonly known as cupro-nickels, a range of copper nickel alloys exists that posseses varied properties and thus are used in different applications. 
Some popular copper nickel alloys are-

Copper with 30% nickel
Copper with 10% nickel
Copper with 5% nickel

All the copper nickel alloys for copper nickel alloy tubes have only one phase since the copper nickel binary system shows complete solid solubility.