Classifications of stainless steel according to type:

Solid stainless and chip: 304, 316, 410, 430, ferritic, Duplex, Superduplex ...

Stainless steel is a metallurgical product resulting from adding a fairly high proportion of nickel and chrome to steel. Stainless steel does not come from any surface protective layer of the same steel, but refers to the alloy and the mixture of metals.