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What is Stainless Steel?  

Stainless steel is a corrosion resistant alloy. Their remarkable resistance to corrosion is due to a chromium oxide film which forms on the surface. When ordinary carbon steel is exposed to air or water, it corrodes and forms a brown colored iron oxide-commonly called rust, on its surface. They will scale off and eventually the entire piece of steel will corrode and converted to rust. But when enough chromium (more than about 10%) is added to ordinary steel, the oxide on the surface formed will become a very thin, virtually invisible material and protective against wide ranges of corrosive medium. This is what we call stainless steel and there are several different types and grades.