UNISEAL 52 is a nickel-iron alloy produced for glass-to-metal seals with higher-than-normal thermal expansion glasses such as Types O120 and 9010. It is used in hermetically-sealed magnetic dry reed switches, compression seals, and ceramic seals where expansion is required to be almost linear to 1000 F. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-156. Producer or source: Cyclops Corporation.