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Kovar Companies and Suppliers

糖心Vlog is a top industrial directory listing of leading industrial kovar compaines and suppliers. Access our comprehensive index to review and source kovar suppliers with preview ads and detailed product descriptions. These kovar companies can design, engineer and supply kovars to your specifications and application need. A quick and easy to use request for quote form is provided for you to contact these kovar companies and suppliers. Each company has detailed profile information, locations, phone number, website links, product videos and product information defined. Read customer reviews and product specific news articles. We are the right resource for your information requirement whether its for a supplier of kovar steel plates, kovar welding, kovar tubings.

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  • Bolingbrook, IL

    At Corrosion Materials, we specialize in supplying corrosion-resistant alloy products that meet the rigorous demands of critical applications across a wide range of industries. With a deep-rooted focus on nickel-based alloys, we offer an extensive inventory of sheet, plate, pipe, tubing, bar, and fittings, all meticulously sourced and maintained to ensure top-tier quality and traceability.

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  • Hamilton, OH

    At United Performance Metals, we specialize in providing high-performance metal solutions with a strong emphasis on nickel alloys and specialty stainless steels. Our team is deeply committed to meeting the complex needs of customers across aerospace, power generation, medical, and other advanced manufacturing sectors. We offer a wide inventory of nickel-based products, including sheet, plate, bar, and coil, in grades engineered to perform in extreme environments.

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  • Fife, WA

    At Service Steel Aerospace, we specialize in providing premium-quality nickel products tailored to the needs of the aerospace industry. Our extensive range of nickel alloys and materials is designed to meet the rigorous demands of aerospace applications, offering superior strength, durability, and corrosion resistance.

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  • Irwindale, CA

    Sierra Alloys is a manufacturing service center specializing in titanium, PH grades of stainless, VAR aircraft alloy steels and nickel based alloys. Sierra's in-house forging and hot rolling equipment serves to meet and exceed the most stringent customer requirements. We have over 30 years experience.

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  • Bristol, RI

    Need nickel, nickel alloys (200, 201, 205, 211, 233), nickel bar, sheet, strip, wire or welding wire? Call us. Our other nickel alloys include nickel-copper, nickel-chromium, copper-nickel, iron-nickel, copper nickel manganese and low OHM resistance alloys. Small or large quantities honored. Not only do we specialize in nickel and nickel based alloys we also specialize in customer satisfaction. Give us a call or visit our website today!

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Kovar Industry Information

Kovar

Also known as Rodar, Kovar is a registered trademark that refers to a low expansion alloy that is composed of iron, nickel, cobalt, and trace amounts of the elements manganese, silicone, and carbon. Kovar was specifically formulated as a sealing alloy for glass and ceramic materials (specifically for compatibility with the thermal expansion characteristics of borosilicate glass).

Quick links to Kovar Information

Applications of Kovar

The material is used by many industries, including electronics, medical, semiconductor and industrial manufacturing, to provide exceptional hermetic seals for applications such as power tubes, vacuum tubes, transistors, microwave tubes, diodes, integrated circuits, and x-ray tubes.

Characteristics of Kovar

Most often used in applications requiring a glass to metal seal, Kovar is vacuum melted, meaning that it has undergone melting, refining, and casting under a vacuum. An additional property of Kovar is that, at any temperature under that of the Curie point (435掳C or 815潞F), it is magnetic. Kovar is similar to another nickel alloy, referred to as Invar. Invar is a nickel steel alloy with specific thermal expansion properties; however, Invar is unique for its low thermal expansion qualities, while Kovar is unique for its low thermal expansion in terms of its compatibility to heat-resistant glass.

Material Properties of Kovar

Kovar is specifically composed of 54% iron, 29% nickel, 17% cobalt, .2% silicon, .3% manganese, and less than .01% carbon. This chemical composition has narrow limits that are controlled to ensure optimal thermal expansion compatibility.

Kovar Design and Customization

Kovar can be fabricated into shapes and parts such as sheets, rods, plates, bars, and tubing through a variety of heat treating processes, including annealing and forging. Although high temperatures are not critical when annealing Kovar, temperatures greater than 900潞C (1652潞F) are not recommended because the high heat will promote grain growth. When it comes to forging Kovar, the biggest concern is that the Kovar must be heated quickly to avoid soaking within the furnace, which can affect the surface appearance of the alloy.

In addition to manufacturing processes, there are many types of secondary services that are commonly used on Kovar including turning, drilling, tapping, and reaming. When it comes to turning Kovar, it is necessary to pay attention to the angle of the cutting tools. For drilling Kovar, it is the speed of the drill and the resulting feed that must be taken into consideration. It is the same for reaming but with different required proportions. Lastly, when it comes to tapping Kovar, the speed should be around 20 feet per minute (FPM), and it is recommended to use either nitrided or electrolyzed tools.



Kovar Informational Video


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