440C Stainless Steel
Chemical Composition
Carbon:               0.95%-1.20%
Manganese:          0.00%-1.00%
Silicon:                 0.00%-1.00%
Phosphorous:         0.00%-0.04%
Sulfur:                  0.00%-0.03%
Chromium:             16.0%-18.0%
Molybdenum:          0.00%-0.75%
Properties
440C's physical properties greatly depend on the amount of heat treating done to it. Please check with your Alro Sales Representative if you require physical properties for your application.
Typical Uses
Typical applications for 440C include:
  • Rolling Element Bearings
  • Valve Seats
  • High Quality Knife Blades
  • Surgical Instruments
  • Chisels

440C Stainless Steel

440C is a high-carbon chromium steel designed to provide stainless properties with maximum hardness. It has been used primarily as a bearing steel, and is used in the hardened plus tempered condition. When heat-treated, it attains the highest hardness of any stainless steel (about Rockwell C 60). 440C is not usually recommended for elevated temperature applications since corrosion resistance is reduced when used in the annealed condition or hardened and tempered above about 800 degrees F (427 degrees C). 440C resists corrosion in normal domestic environments and very mild industrial environments, including many petroleum products and organic materials.

Alro stock 440C in Round Rods.