By definition stainless steel contains a minimum of 10.5% chromium, but it can also include a number of other alloying elements – for example nickel, or molybdenum – for enhanced properties in specific applications. Thus some stainless steels perform better in corrosive marine environments, some are better suited to high temperatures, while yet others offer much greater strength.
Today high-strength stainless steels are becoming increasingly popular because they reduce material use – and thus also minimize environmental impact. See how Outokumpu categorises the different stainless steels: