<P> There is a secondary market that recycles usable scrap for many stainless steel markets . The product is mostly coil, sheet, and blanks . This material is purchased at a less - than - prime price and sold to commercial quality stampers and sheet metal houses . The material may have scratches, pits, and dents but is made to the current specifications . </P> <P> Stainless steel nanoparticles have been produced in the laboratory . This synthesis uses oxidative Kirkendall diffusion to build a thin protective barrier which prevent further oxidation . These may have applications as additives for high performance applications . For examples, sulfurization, phosphorization and nitridation treatments to produce nanoscale stainless steel based catalysts could enhance the electrocatalytic performance of stainless steel for water splitting . </P> <P> Stainless steel is generally considered to be biologically inert, but some sensitive individuals develop a skin irritation due to a nickel allergy caused by certain alloys . </P> <P> Stainless steel leaches small amounts of nickel and chromium during cooking . </P>

What is added to steel to make it stainless