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Kovar is a controlled expansion alloy made up of Iron, Nickel and Cobalt and can be fabricated into a variety of parts such as: plates, round bars, sheets, coils, wires and tubes. Its chemical composition is closely controlled within narrow limits in order to ensure accurate and precise uniform thermal expansion characteristics.
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Kovar, also known as ASTM F 15 Alloy, is a controlled expansion alloy that is typically applied to high integrity glass and ceramic to metal seals, lids, lead frames and electronic package base. Kovar is made of nickel, cobalt and iron. This alloy is designed to adapt to computer, microwave, hydrid, semiconductor and space age technology demands, thus, making this an essential resource to the.
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Kovar is a nickel-cobalt ferrous alloy, and its coefficient of thermal expansion is similar to that of hard (borosilicate) glass. It is a suitable choice for sealing between metal and glass or ceramic parts. Another metal used in hermetic packaging is Alloy 42. The properties of Kovar and Alloy 42 are listed in Table 1.2.
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Easy-to-Machine Thermally Stable Kovar Nickel Alloy Rods. Yield Strength: 55, 000 psi. Hardness: Rockwell B105 (Hard) Temper: Condition B (1/4 Hard) Specifications Met: ASTM F15. This nickel-iron-cobalt alloy expands at the same rate as glass when heated. It offers better machinability than Invar 36 and is often used anywhere a dependable glass.
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Easy-to-Machine Thermally Stable Kovar Nickel Alloy Sheets. This nickel-iron-cobalt alloy expands at the same rate as glass when heated. It offers better machinability than Invar 36 and is often used anywhere a dependable glass-to metal seal is required, such as in diodes and microwave tubes. For technical drawings and 3-D models, click on a.
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Eagle Alloys Corporation is a global supplier of nickel iron controlled expansion alloys including Kovar® in various forms and sizes. Kovar® is a low expansion, controlled expansion, or glass-to-metal sealing alloy with high corrosion resistance and high temperature performance.
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Kovar not only has thermal expansion similar to glass, but its nonlinear thermal expansion curve can often be made to match a glass, thus allowing the joint to tolerate a wide temperature range. Chemically, it bonds to glass via the intermediate oxide layer of nickel(II) oxide and cobalt(II) oxide.
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Kovar® is an iron-nickel-cobalt alloy with a coefficient of thermal expansion similar to that of hard (borosilicate) glass. Learn about its typical analysis, physical and mechanical properties, heat treatment methods and applications in the electronics industry.
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Kovar is an iron nickel cobalt alloy with a coefficient of thermal expansion similar to that of hard glass or ceramic, making it ideal for applications where glass or ceramic materials are joined with metal. Learn about its main benefits, common uses and examples of Kovar in products such as x-ray tubes, power tubes and integrated circuits.
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Kovar is an iron-nickel-cobalt alloy with a coefficient of thermal expansion similar to that of hard (borosilicate) glass. This makes it especially suitable for uses which require a matched-expansion seal between metal and glass parts. Thus kovar finds wide usage in the electronics industry for metal parts bonded to hard glass envelopes for.
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Kovar is a nickel-iron-cobalt alloy with controlled expansion for hermetic sealing applications. City Special Metals is a leading UK supplier of Kovar plates, bars, sheets and other forms, with technical specifications and insights.
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Kovar alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Extensive quality controls are employed in the manufacture of this alloy to ensure uniform physical and mechanical properties for ease in deep drawing.
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Alloy K (Kovar®) is an iron-nickel-cobalt alloy for high integrity seals and electronic components. Learn about its chemical composition, mechanical properties, applications and related specifications from Columbia Metals, a leading supplier of Alloy K (Kovar®).
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The need for a reliable glass to metal seal arose in the design and manufacture of early electrical and electronic devices such as lightbulbs, vacuum tubes, and cathode tubes. Today, Kovar is also used to create hermetic glass to metal sealed microelectronic packages. These packages are used to protectively house the sensitive electronics used.
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Kovar is a nickel-iron-cobalt alloy used for hermetic sealing applications in electronics and other industries. It has a unique controlled expansion property that matches borosilicate and alumina ceramics. Ed Fagan is a leading supplier of Kovar and other controlled expansion alloys with various sizes, tempers, and conditions.
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Kovar is a specialty alloy with CTE characteristics similar to multiple glass and ceramic components, that can be tailored to have specific non-linear thermal expansion curve to match the material it is mating with. It is used in temperature-sensitive glass and metal applications, such as satellite propulsion systems, Mars rovers, and light bulbs, and is less expensive and easier to machine than Molybdenum.