Cupronickel alloys provide excellent corrosion resistance, particularly in seawater.
In principle, a cupronickel can contain between 1% and 49% nickel, such that copper remains the main element.
Cupronickels have a very low magnetic permeability <1.01.
Copper is an excellent electrical conductor, only bettered by silver, explaining why it is used in domestic electrical wiring.
There is negligible difference in the composition of Alloy K500 versus Alloy 400, but Alloy K500 is appreciably stronger.
Copper has excellent thermal conductivity, explaining its widespread use in household implements such as pots and pans.
Brasses are copper-based alloys with additions of zinc. They are typically very formable and bright yellow in appearance.
Bronzes are copper-based alloys typically with additions of tin, aluminium and silicon.
There are perhaps 400 or more different copper-based alloys.
S32205 (F60) is produced to the upper end of the alloy specification of S31803 (F51), to give improved corrosion resistance.
With such a wide range of different alloys available, it is quite possible that several may all be suitable for a given application.
Nickel-Copper alloys are those where copper is the main alloying element to a base nickel composition.