ASTM A182 Duplex Stainless Steel Flanges uesed in uniform corrosion and chlorine stress corrosion cracking
S31803 has been supplemented by S32205 (F60) which has a higher minimum Ni Cr and Mo.
ASTM A182 F51 is a duplex stainless steel with a 50:50 austenite, ferrite microstructure. The material combines good mechanical strength and ductility with moderate to good corrosion resistance in a variety of environments. ASTM A182 Duplex Steel F51 Flanges, which was formed for and is used in extremely hostile atmospheres. Duplex 2205 Stainless Steel Has A Two-Phase Microstructure I.E., Ferritic And Austenitic. Chemically, The Duplex 2205 Flanges Stock Contains About 22% Chromium, 3% Molybdenum, 5 To 6% Nickel As An Alloyed Stainless Steel.