Kovar Bar and Rod

Based in the industrial heart of Safat, Kuwait, Nimish Metal has built a reputation as a trusted manufacturer and supplier of specialized alloys, with a particular focus on Kovar. We understand that certain applications demand materials with exceptional reliability, which is precisely why our Kovar bars and rods are produced to the highest standards. Our commitment ensures that industries requiring precise thermal management receive a component they can count on for consistency and performance, backed by our local expertise and dependable service.

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Kovar Round Bars

Kovar Rectangular Bars

Kovar Square Rods

What is Kovar Bar and Rod?

Kovar possesses a unique and carefully controlled composition of iron, nickel, and cobalt, which is the secret to its remarkable behavior. This specific formulation gives it a thermal expansion rate that closely matches that of hard glass and certain ceramics over a wide temperature range. As a result, our bars and rods are not only dimensionally stable under thermal stress but also offer excellent mechanical strength and malleability, making them suitable for demanding fabrication processes where a perfect seal is non-negotiable.

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Kovar Bar and Rod Specification

Standards :	UNS K94610 \| Werkstoff Nr 1.3981 \| DIN 17745 \| ASTM F15 \| AMS 7726 \| AFNOR NF A54-301 \| S.E.W 385
Size Range :	0.015″ Thk up to 2″ Thk
Thickness :	Range from .008″ to .0125″
Length :	2m, 2.44m, 3m, or as required
Width :	10-2500mm

Chemical Compositions of Kovar Bar

Weight %	Ni	Fe	Co	C	Mn	Si	Al	Cr	Mg	Zr	Ti	Cu	Mo
Alloy K Kovar	29.0	53.0	17.0	0.04 max	0.50 max	0.20	0.10 max	0.20 max	0.10 max	0.10 max	0.10 max	0.20 max	0.20 max

Kovar Bar Mechanical Properties

Material	Condition	Yield Strength (0.1% Offset)		Tensile Strength		Elongation %
Material	Condition	psi	MPa	psi	MPa	Elongation %
Alloy K Kovar	Annealed	49,000	340	75,000	520	42

Kovar Bar Equivalent Grades

ASTM	UNS	Workstoff	AMS	DIN	AFNOR	S.E.W
F15	K94610	1.3981	7726	17745	NF A54-301	385

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Why Nimish Metals?

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Kovar Bar and Rod Types

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Frequently Asked Questions (FAQ)

Are Kovar Rod Susceptible To Galvanic Corrosion?

Kovar rods, primarily composed of iron, cobalt, and nickel, are resistant to galvanic corrosion due to their similar electrochemical properties with most alloys, reducing the risk when paired with compatible materials.

Can Kovar Bar Be Welded?

Yes, Kovar bar can be welded, but it requires special techniques and precautions due to its unique composition and thermal expansion properties. Proper heat control and filler metals are essential.

What Sizes and Finishes Are Available for Kovar Rod?

Kovar rods typically come in diameters ranging from 1/8" to 4" and lengths of up to 12 feet. Finishes include mill, polished, and brushed surfaces for various applications.

Kovar Bar and Rod Uses

You will typically find Kovar from Nimish Metal at the core of sophisticated electronic and telecommunications equipment. It is essential for creating hermetic seals in components like power transistors, microwave tubes, and laser housings, where it joins seamlessly with glass or ceramic to protect sensitive internal parts. Its use also extends to critical aerospace and scientific instruments, ensuring that devices perform flawlessly despite experiencing extreme temperature fluctuations, making it an unsung hero in modern technology.

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