20Mo-4 stainless complements 20 Cb-3 (Alloy Digest SS-182, June 1966) in that it offers good reducing acid corrosion with better pitting and crevice corrosion resistance. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-484. Producer or source: Carpenter.