CWI Nickel Prime Series 20 (20Cb3) is an iron-based, austenitic alloy with outstanding corrosion resistance in a number of different environments. It also offers an excellent resistance to hot sulfuric acid.
UNS N08020 - Cr: 19.0-21.0%, Cu: 3.0-4.0%, Mo: 2.0-3.0%, Ni: 32.0-38.0% and Cb: 8xC - 1.0% with full chemistry to ASTM B471, B473 and B475