Stainless Steels

Stainless Steel

The generic name commonly used for that entire group of iron-base alloys which exhibit phenomenal resistance to rusting and corrosion because of chromium (Cr) content. Contents of Cr exceeding 10%, with carbon (C) held suitably low, make iron effectively rustproof.

Other alloy elements, notably nickel (Ni) and molybdenum (Mo), can also be added to the basic stainless composition to produce both variety and improvement of properties. Over 100 different stainless steels are produced commercially, about half as standardized grades. Some are more properly classed as stainless irons since they do not harden as steel; others are true steels to which corrosion resistance becomes an added feature. Still others that are neither properly steels nor irons introduce totally new classes of materials, from both mechanical and chemical standpoints.