Austenitic SS Alloy 20
ALLOY 20 | N08020 | 2.4660 | NICR20CUMO | Z2NCUD31-20AZ
Alloy 20, also known as Carpenter 20 is an austenitic nickel-iron-chromium alloy and has an excellent resistance to acid attack, especially sulfuric acid. It also shows fine resistance in phosphorous acid, nitric acid and chloride environments.
Unlike other metals, alloy 20 has a pre-eminent resistance to chloride stress corrosion cracking, resistance to pitting and crevice corrosion.
The corrosion rate of the alloy in the presence of various concentrations of sulfuric acid is completely off the charts, varying from 4 to 30 mils per year. (thousands of an inch per year)