Alloy 20 is a austenitic nickel-iron-chromium alloy developed for maximum resistance against
acid attack, specially sulfuric acid. It offers excellent resistance to pitting, crevice
corrosion and general corrosion in chemicals containing chlorides and sulfuric, nitric ,
phosphoric and acids.For stabilization against sensitization and resultant intergranular
corrosion Alloy 20 contains niobium. With relatively easy fabrication and elevated
mechanical properties Alloy 20 also provides excellent corrosion resistance.