MATERIALS-STUDBOLTS/HEX NUTS ASTM A182 F51
ASTM A182 specification covers forged or rolled alloy and stainless steel pipe flanges, forged fittings, and valves and parts for high-temperature service for use in pressure systems.
A182 F51 – UNS S31803
Excellent corrosion resistance in a wide variety of corrosive
Outstanding resistance to pitting and crevice corrosion in seawater and other chloride containing environments, with critical Pitting Temperature exceeding 50°C
High strength compared to austenitic and 22%Cr duplex stainless steels
Excellent ductility and impact strength at both ambient and sub-zero temperatures
High resistance to abrasion, erosion and cavitation erosion
Excellent resistance to stress corrosion cracking in chloride containing environments
Listed in NACE MR 01 75 for sour service
Stainless steel Duplex grade 2205, F51, UNS 31803, 1.4462 used for heat exchangers, chemical tanks, refineries, shafts, pressure vessel parts, flanges and pipes for the oil and gas industries, paper industry, compressor parts and seawaterdesalination plants.