Sheet metal alloy steel Ferralium® 255

high-strengthcorrosion resistantpickled

Ferralium® 255 is a super duplex stainless steel supplied in the hot worked, annealed and pickled condition. It achieves higher strengths than other alternative corrosion resistant alloys, offering the potential to reduce section size and therefore weight and cost. As a 25% Cr alloy, with significant additions of Cu, it offers excellent corrosion resistance in a wide variety of corrosive chemicals including sulphuric, nitric and phosphoric acid. In seawater and other chloride containing environments it also provides outstanding resistance to pitting and crevice corrosion, with Critical Pitting Temperature exceeding 50°C. Excellent ductility and impact strength at both ambient and sub-zero temperatures combine with a high resistance to abrasion, erosion and cavitation erosion. Listed in NACE MR 0175 for sour service and having gained ASME Approval for Pressure Vessel applications, Ferralium® 255 is tested to the highest degree using tests designed to guarantee that the trade-marked product possesses high integrity, a correct phase balance and the absence of sigma and other deleterious phases. Key Features: Originally developed in 1960’s, pioneering the addition of nitrogen, to create the first super duplex stainless steel Continuously developed through 1990’s to extend PREN > 40, and more recently to increase mechanical properties Higher copper content provides self-healing effect at sites of pitting to inhibit further growth Available as bars, plate, pipe and fittings with complementary weld wire Particularly suitable for larger components as the formation of sigma phase is much less likely than it is for other Super Duplex grades