NILO alloy 48 is a binary iron-nickel alloy used primarily for glass-to-metal seals. It is also used in thermostats up to 450 C (842 F). This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: Fe-80. Producer or source: Inco Alloys International Inc..