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Kovar Companies and Suppliers

IQS Directory 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.

Leading Companies:

  • Long Island City, NY 800-767-9494

    We supply Nickel and its alloys for a broad range of applications. metalmen provides supply solutions – we respond with quick quotes and on-time deliveries. With our own inventory, our national network of mills, suppliers and processors, metalmen is able to respond to your most challenging requests. Small quantity and custom requests are welcomed.

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  • Torrance, CA 877-455-5362

    For knowledgeable, immediate response to your metal sourcing requests, contact Leading Edge Metals & Alloys, LLC today. This full service, high performance metal supplier is your complete source for aircraft grade materials. We have alloy steels, aluminum, copper and brass alloys, nickel alloys, magnesium, stainless steel, titanium, tool steels, and more, as well as a wide range of specialty plastics.

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  • Pompton Plains, NJ 800-838-1978

    Our company may have started small, but we quickly grew to handle the largest aluminum orders. Our metals are made from the highest quality materials, and we pledge to offer superior service to all our customers. We don’t want customers who use us one time, we want to establish lifelong relationships with customers that last generations. Contact us for more info!

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  • Pittsburgh, PA 800-289-7454

    Serving over 30 nations, ATI produces and markets high-quality stainless steel, tool steel, stainless steel alloys and much more. As a world wide leader, our metallurgists come to you so that we can thoroughly understand and meet your specific requirements.

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  • Cleveland, OH 440-250-1900

    For over 30 years, we have provided metal forged products for a wide variety of industries, including the aerospace, military, food service, medical, and automotive industries. Our customers know they can trust our forgings for quality and affordability. We will never try to make you pay more than you should for our products. Contact us by phone or email to find out more!

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  • Richardson, TX 800-442-4914

    The Trident Company, with almost 40 years of metals sales and service experience, makes on-time shipments throughout the world. Nickel sheet, plate, rod, bar, tubing, pipe, standard structural shapes and wire. Also, Stainless, Carbon, Red metals, Aluminum and many exotic alloys. 11 US locations.

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  • More Kovar Companies

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°C or 815ºF), 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 900ºC (1652ºF) 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


ARTICLES AND PRESS RELEASES

All Metals & Forge Group Pushes for a Break in the Brazil Market

Several North American regions are seeing a surge in oil and gas production. The United States has seen growth from east to west in the Marcellus Shale in Pennsylvania, Ohio’s Utica Shale and the Eagle Ford Shale in Texas. Canada’s oil sands in Alberta have caught the eyes of energy producers, and the Bakken Shale – which spans North Dakota, Montana and Saskatchewan – has brought growth to both countries. Not to be outshined however, South America – and particularly Brazil – is gaining energy in the oil and gas... Read More About This