Alloy 20 was designed specifically to withstand sulfuric acid. Its nickel, chromium, molybdenum and copper levels all provide excellent general corrosion resistance. Restricted carbon plus columbium stabilization permits welded fabrications to be used in corrosive environments, normally without post-weld heat treatment. At 33% nickel, Alloy 20 has practical immunity to chloride stress corrosion cracking. This alloy is often chosen to solve SCC problems, which may occur with 316L stainless.
Alloy 20 Plate, Alloy 20 Sheet, Alloy 20 Weld Wire
Carpenter® 20, 20CB-3®
ASME SA 240, ASME SB 366, ASME SB 463, ASTM A 240, ASTM B 366, ASTM B 463, ASTM B 473, EN 2.4660, UNS N08020, Werkstoff 2.4660