Noun
a 60/40 alloy of copper and nickel
Source: WordNetIn 1968, the 2 kronor switched to cupronickel and the 1 krona switched to cupronickel-clad copper (it was replaced entirely by cupronickel in 1982). Source: Internet
Other wind instruments may be constructed of brass or other metals, and indeed most modern student-model flutes and piccolos are made of some variety of brass, usually a cupronickel alloy similar to Nickel Silver /German Silver. Source: Internet