G-E Alloy Rene 41 is a vacuum melted precipitation hardening nickel base alloy possessing high strength in the 1600-1800 F. temperature range. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as creep. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: Ni-47. Producer or source: General Electric Company. Originally published November 1958, revised January 1963.