Drew;
I Sure hope someone has a chunk of Win Stainless to send you. I have "EXTREME doubt it will prove to be a 300 series stainless, which of course includes 18-8. Here is a link to a good treatise on 18-8 SST.
https://www.fastenersolutions.com/materials-coatings/18-8-stainless-steel/


Miller/TN
I Didn't Say Everything I Said, Yogi Berra