Ferrinox 255LT™ Stainless Steel Bar
Excellent resistance to corrosion in acids.
Ferrinox 255 LT™ is Smiths own designated stainless steel bar product.
Ferrinox 255 LT™ (UNS S32550) is a stainless steel containing 25.5% chromium, and 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. Due to its attractive performance characteristics, the material offers a viable alternative to 300 series stainless steels. It is used in the production of valves, pumps, shafts, control gears, and wellhead equipment.
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.
New Testing laboratory Testing laboratory
In 2024, our UKAS Materials Testing Laboratory relocated to a new, expanded, dedicated site in Biggleswade.
Discover
- 1.4507
- ASTM A276
- ASTM A479
- Ferrinox 255
- NACE MR0103
- NACE MR0175
- Norsok M-630. Norsok M-650
- UNS S32550
- X2CrNiMoCuN25-6-3
- Control gears
- Wellheads
- Valves
- Pumps
- Excellent resistance to corrosion in acids
- High resistance to stress corrosion cracking
- Good ductility
- Conformity with many oil & gas specifications
