N475 and N485 are Fe-Ni-Cr sealing alloys used for bonding soft leads, lead-free glasses, and ceramics. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming. Filing Code: FE-146. Producer or source: Metalimphy Precision Alloys.

N426 is an Fe-Ni-Cr alloy for sealing both glass and ceramics. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming. Filing Code: FE-145. Producer or source: Metalimphy Precision Alloys.

These alloys are all in the nickel-iron alloy system and are designed with expansion rates closely matching those of certain ceramic materials, including glasses. This datasheet provides information on composition, physical properties, microstructure, hardness, elasticity, and tensile properties. Filing Code: FE-120. Producer or source: AMETEK Specialty Metal Products.

ALLOY 52 is a controlled-expansion alloy developed for glass-to-metal seals for some of the soft glasses and some ceramics. Its rate of expansion is almost constant up to approximately 1050 F (565 C). This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-226. Producer or source: Magnetics Specialty Metals Division.

UNISEAL 29-17 is a controlled expansion iron-base alloy containing nickel and cobalt. It is widely used for glass-to-metal seals with borosilicate glasses commonly employed in electronic power tube envelopes. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Fe-45. Producer or source: Cyclops Corporation.

Brush Alloy M220C is a betyllium-nickel casting alloy that responds to an age-hardening heat treatment and is characterized by high strength thermal conductivity combined with excellent corrosion, oxidation and wear resistance. It is recommended for mold tooling in the glass industries. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as casting, heat treating, machining, joining, and surface treatment. Filing Code: Ni-114. Producer or source: Brush Beryllium Company.

NILO K has been developed specifically for the production of matched glass-to-metal seals when using hard, borosilicate glass. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on forming, heat treating, machining, joining, and surface treatment. Filing Code: Fe-16. Producer or source: Henry Wiggin & Company Ltd. Originally published August 1959, revised January 1966.

KOVAR A is a cobalt, nickel, iron alloy recommended for sealing into hard glass. Has similar expansion curve as glass, makes firm bond between metal and glass, is easy to machine and form, and has high resistance to thermal shock. 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: Fe-3. Producer or source: Carborundum Company, Refractories Division.