431 Stainless Steel

431 stainless steel is a martensitic stainless steel that is AOD melted.  This alloy has excellent corrosion resistance for a 400 series stainless and can be heat treated to high strength levels.  This grade is often used in the aerospace industry as fittings and boltings requiring high yield strength.  The excellent corrosion resistance also lends itself well to the marine industry.

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Specs USAP Produces to:
  • AMS 5628
  • AMS-S-18732
  • ASTM A276
  • Federal QQ-S-763
  • Hi Shear #115
  • McDonnell Douglas DMS-1565
  • Mil-S-18732

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.


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

Industry / Trade Names
  • UNS S43100
  • DIN 1.4057
  • X17CrNi16-2
  • S80
  • Aerospace
  • Other Industrial Markets
Melt Types
  • AOD
Grade Families
  • Martensitic
  • Stainless Steel

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