Stainless steel (inox steel) is a chromium containing steel alloy with a wide range of applications. Chromium in stainless steel ranges from 10.5% to 11%. Chromium oxide film protects the surface of the steel against oxygen in air and water. It has excellent stain and corrosion properties and easily reflects light.
Corrosion resistance generally increases with increasing content of chromium. There are about 150 grades of stainless steel among them 15 are most commonly used. Low maintenance, relative inexpensive and familiar luster make it an ideal choice for many commercial applications.
The proper selection of grade and type is critical to meet the particular corrosion resistance requirements. Nickel, molybdenum, titanium, and copper are added to enhance formability, strength, and cryogenic toughness.