COPPER ALLOY No. 774 is a nickel silver press-forging alloy that has a forgeability rating of 85% of that of Forging Brass. This datasheet provides information on composition, physical properties, hardness, tensile properties, and shear strength. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Cu-245. Producer or source: Chicago Extruded Metals Company.