About Smiths Advanced

We are a leading stockholder and global supplier of metals and plastics into Aerospace & Space, Chemical, Defence, Medical, MRO, Naval, Nuclear, Oil & Gas and Power industries.

We make high quality materials available in a fast, cost-effective and convenient package and provide a consistent supply path for all our customers.

UKAS Laboratory

Ferrinox 255LT™ Stainless Steel Bar

Excellent resistance to corrosion in acids.

Smiths Advanced Metals stocks Ferrinox 255TM LT stainless steel bars in a solution-treated condition.

Ferrinox 255 LT™ is Smiths own designated stainless steel bar product.

Ferrinox 255 LT™ (UNS S32550) is a stainless steel containing 25.5% chromium, 6% nickel with significant molybdenum, copper and nitrogen additions and a PREN (pitting resistance equivalent) of=40.0. The copper content of 1.6% is particularly beneficial in promoting optimum resistance to corrosion in acidic environments. The chemical composition and mechanical properties conform to the requirements of UNS S32550, 1.4507 and several oil and gas industry specifications. The microstructure is controlled with a phase balance close to 50:50 austenite and ferrite with complete freedom from grain boundary carbides, sigma phase and other deleterious precipitates.

Own Designation

The alloy is Smiths own designation and is classed as a super duplex (austenitic/ferritic) stainless steel. The material offers a viable alternative when compared to 300 series stainless steels due to the attractive performance characteristics of the alloy. The material finds use in the production of valves, pumps, shafts, control gears and wellhead equipment.

Ferrinox 255LT Stainless Steel Bar Datasheet

Stock Availability

Smiths Advanced Metals stocks Ferrinox 255 LT™ stainless steel bars in a solution-treated condition. We supply bars for this alloy in closer incremental sizes.

Product Features:

    ASTM A276
    ASTM A479
    Ferrinox 255
    NACE MR0103
    NACE MR0175
    Norsok M-630
    Norsok M-650
    UNS S32550

    Control gears

    Excellent resistance to corrosion in acids
    High resistance to stress corrosion cracking
    Good ductility
    Conformity with many oil & gas specifications

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