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Kovar Manufacturers 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.

  • 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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  • 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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  • Commerce, CA 800-800-1150

    Since 1952, the Welding Warehouse has been manufacturing and distributing a variety of stainless steel products as well as titanium, aluminum, nickel, low alloy steel, magnesium, silver alloy and copper base alloy products. We also offer precision wire processing. In addition, we meet aerospace material specifications.

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  • Ronkonkoma, NY 800-900-9209

    Alloys International specializes in performance metal solutions within the Aerospace, Petro-chemical, Nuclear, Electrical Power, Medical industries. Alloys International sources the best high-tech specialty metal mills throughout the world for your needs in nickel and other exotic & high temperature alloys. We provide the difficult alloys, sizes and specifications that others can’t in nickel, cobalt, titanium and most other specialty alloys.

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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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  • Anaheim, CA 877-932-7832

    Count on Weartech's more than 150 years of combined experience for superior nickel & cobalt based hardfacing & wear resistant alloys. Weartech supplies the most versatile cobalt & nickel alloys for the harsh environments of automobile to aerospace. Rods, electrodes, wires, powders and engineered components. Weartech produces its products to the ISO 9001 system and is a certified ISO 9001 company.

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  • Hamilton, OH 888-282-3292

    The diversity of our selection of high-performance metal items is unsurpassed. Our team works hard to make our products suitable for various industries, and save you money in the long run. We are determined to supply the best stainless steel products around. Your satisfaction is guaranteed when you select United Performance Metals as your supplier. Please give us a call today to learn more information!

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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

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IQS Newsroom Articles on Kovar

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).

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. 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 very 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 for its low thermal expansion in terms of its compatibility to heat-resistant glass.

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 very controlled in order to ensure optimal thermal expansion compatibility. 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 in order 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, and 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 Manufacturers
Kovar Manufacturers - Metalmen

Kovar Informational Video