Ferralium® SD-50 Fasteners (ASTM A276/A479/UNS S32550/1.4507/ASME A182 F61)
As a 25% Cr alloy, with significant additions of copper, Ferralium® 255 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 01 75 for sour service and having gained ASME Approval for Pressure Vessel applications, Ferralium® 255-SD50 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.
Ferralium has a wide range of applications where high levels of corrosion resistance are required, such as chemical and seawater environments. Fasteners are often supplied for swimming pool construction, the marine industry, sewage treatment, subsea equipment in the oil and gas industry, chemical processing and paper industries.
Ferralium Fasteners including Bolts, Nuts, Socket Capscrews, Washers, Studs, Studbolts, Socket Setscrews, Socket Countersunk Screws & machined components to all recognised standards drawings as well as customer drawings can be produced at Beacon Corporation Limited.
*Information is given as guidance only