Any wire can be used for making repairs etc. but brass or stainless steel wire is easier to use for a snare, and wont corrode as fast as steel wire.
BTW I was looking for getting more stainless steel utility wire as the one in Doug's PSP. I found 22 GA S/S wire at Canadian Tire in the hunting department. Just a little detail: the wire in Doug's PSP is 0.020" that is 24 GA. 22 GA is 0.025" which means it's thicker. Is 22 GA still appropriate for snare wire or does it become too heavy to cut without a multi-tool?
Thanks