Maybe I should restate that:
Nickel is an element, not an alloy.
Ni200 refers to nickel:
"Nickel 200 alloy is a
commercially pure nickel"
The designation Ni200 refers to a standard or purity or grade
Oh!.
Very good point.
Nickel Alloy Ni-200, Commercially Pure Nickel, Low Alloy Nickel - Continental Steel & Tube Company
So far as I can see Ni-200 refers to commercial grade pure nickel. Technically it can be described as an alloy because it has some measureable impurities, but it is not a deliberately fabricated alloy where you can say how much of what is in it besides the nickel.
Nichrome for example is a deliberate alloy of nickel and chromium.
Ni200 seems to be 99.6% nickel and 0.4% unknown impurities.
Alloy or Standard of Purity/Grade. I'm really Comfortable with either for the Contents of this Thread.
And either Description of the Wire on a Spool doesn't Detract from what the Wire Does.