N-S 25 is a cobalt-base high temperature spring alloy. It has exceptional properties at temperatures up to 1800 F in the fully annealed condition. It is recommended to be used at temperatures from 400 to 1400 F. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as heat treating and joining. Filing Code: Co-27. Producer or source: National-Standard Company.