UNS S31254 (F44)

UNS S31254 (F44, 1.4547) is a super austenitic stainless steel alloy containing 6% molybdenum (Mo).

The stainless steel offers an attractive combination of good malleability with moderate strength. UNS S31254 provides excellent corrosion resistance, particularly in saltwater, although it performs well in other industrial environments. Resistance to pitting corrosion is also high. The alloy should be considered a viable alternative to standard austenitic stainless steels because the material offers greater mechanical strength and enhanced pitting resistance.


Typical commercial applications include:

  • High ductility
  • Highly resistant to pitting corrosion
  • Excellent corrosion resistance
  • Greater mechanical strength compared to other grades
Machinability & Welding

Machinability and welding of the alloy present no difficulties. Though not as machinable as austenitic stainless steels, the alloy machines better than those which are nickel-based. Welding methods are similar to standard austenitic stainless steels (plasma, shielded metal arc, TIG). UNS S31254 is often referred to as high molybdenum stainless steel.


UNS S31254 finds use in engineering applications, including oil & gas industry components, pumps & valves, flanges & manifolds, chokes and marine parts.


Our fully traceable stocked products are processed in-house utilising our bar sawing and plate-cutting equipment. We cut your round bars and plates to tight tolerances and keep a stock of pre-cut plates available for immediate supply.


We stock UNS S31254 in solid round bars and plates.

UNS S31254
UNS S31254 Stainless Steel
UNS S31254 pdf
UNS S31254 Stock

Product Summary

Product UNS S31254
Type Super Austenitic Stainless Steel
Availability Round bar and plate
Benefits High ductility, highly resistant to pitting corrosion, excellent corrosion resistance, greater mechanical strength compared to other grades
Applications Oil & Gas industry components, pumps & valves, flanges & manifolds, chokes
Datasheet UNS S31254 - Technical Datasheet
Reference Home/ Products/ Stainless Steels/ UNS S31254

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