Most likely. I'm not sure if stainless is allowed, but assuming it isn't there are often all sorts of other factors that aren't immediately obvious. Take aluminum (ALU): ALU wiring was used in electrical wiring work between the breaker panel and receptacles for many years before they stopped allowing it due to the expansion/contraction that could happen over time, causing poor connectivity in some cases, causing excess heat, causing fire concerns. There's nothing inherently unsafe with ALU wiring as long as you go and open up all your outlets once every ~5 years to recheck/retighten. But of course you can't ask or expect a homeowner to do that. ALU is still allowed for service entrance wire (the usually short piece between the meter and the panel because of how it's fastened - I watched an electrician do our ~3 years ago when we upgraded from a 100A to 200A service).
Sorry - that was somewhat off topic!
Kal