NIMONIC alloy 91 is a modification of NIMONIC alloy 90 (Alloy Digest Ni-6, December 1961) with better stability and improved hot corrosion resistance. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: Ni-503. Producer or source: Inco Alloys International Inc.