440FSE Stainless Steel

440FSE is a high carbon martensitic stainless steel that is AOD melted.  This alloy is considered a free machining grade because of the added Selenium creating a better machinability version of  similar grades 440A stainless and 440C stainless. This grade is suitable for non-galling and non-seizing applications.   This alloy is often considered for general machined parts requiring higher hardness values than other free machining grades such as 420F.

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Specs USAP Produces to:
  • AMS 5632
  • ASTM A582
  • Federal QQ-S-764

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Product Forms Sold:

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

Approvals
  • GE S-400, S-1000

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Industry / Trade Names
  • UNS S44023
Markets
  • Aerospace
  • Other Industrial Markets
Melt Types
  • AOD
Grade Families
  • Martensitic
  • Stainless Steel

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