Stainless steels are iron-base alloys containing chromium. Stainless steel strip usually contain less than 30% Cr and more than 50% Fe. They attain their stainless characteristics because of the formation of an invisible and adherent chromium-rich oxide surface film. This oxide establishes on the surface and heals itself in the presence of oxygen.
Applications: elastic parts, knives, computer shrapnel, textile needles.