440C Stainless Steel

440C is a high carbon martensitic stainless steel that is AOD or AOD + ESR melted.  It has slightly more carbon than 440A and 440B giving it the highest hardness of any martensitic stainless alloy.  This grade has excellent wear resistance making it perfect as a bearing steel used as ball bearings and bearing races.  It also is readily used as cutlery. 

Please inquire today about your steel needs.

Specs USAP Produces to:
  • AMS 5618
  • AMS 5630
  • AMS 5880
  • AMS-QQ-S763
  • ASTM A276
  • ASTM F899
  • Barden SA 1254
  • Federal QQ-S-763
  • NHBB PES 1.102
  • NHBB SM3
  • Woodward SP-1197

Don't see the spec you're looking for? Not all specs are listed so please submit an inquiry!

Product Forms Sold:

Size ranges vary by specification and specific order requirements; inquire for your specific needs.

Approvals

Don't see the approval you're looking for? Not all approvals are listed so please submit an inquiry!

Industry / Trade Names
  • UNS S44004
  • UNS S44000
  • DIN 1.4125
Markets
  • Aerospace
  • Heavy Equipment
  • Other Industrial Markets
Melt Types
  • AOD
  • AOD+ESR
Grade Families
  • Martensitic
  • Stainless Steel

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