Stainless Steel 430 Product Guide Stainless Steel Tolerance Table. Stainless Steel Sheet/Plate 430 is normally used for architectural, machine, automotive, natural gas/petroluem/oil, thermal, and furniture applications. 430 stainless is notable for having a corrosion resistance similar to nickel stainless steels when exposed to atmospheric and mildly corrosive environments.430 Stainless Steel Sheet #4 Finish Stainless Supply430 stainless steel sheet #4 finish is the brushed finish commonly seen on kitchen appliances and backsplashes. 430 Stainless Steel Sheet #4 finish has a PVC film on one side to help protect against scratching during fabrication and installation. Our 430 stainless steel sheet metal meets the criteria for both the #3 and #4 finish.