Stainless Steel Alloys
Stainless steels owe their ability to resist corrosion primarily to the presence of a passive film on their surface. Chromium is chiefly responsible for formation of the passive film. Iron ceases to rust at approximately 12% chromium content and resistance to oxidizing corrosives increases rapidly with chromium content up to approximately 20%. Beyond that level, resistance is increased at a more gradual and declining rate. Consequently, few stainless alloys contain more than 27% chromium.
Want to know common applications for stainless steel alloys? Download our Where Used Guide.