Kovar Bar and Rod

For decades, Junaid Metals has stood as a trusted name in Manama, Bahrain, serving industries with precision and reliability. Our specialty lies in providing high-quality materials like Kovar Bar and Rod. We understand that your projects demand perfection, which is why we ensure our Kovar products meet the most stringent standards. From the heart of the Gulf, we are your dependable partner for materials that are as resilient as the region itself, committed to supporting innovation and excellence in every order we fulfill.

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Kovar Round Bars

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What is Kovar Bar and Rod?

The unique composition of Kovar, an iron-nickel-cobalt alloy, is precisely engineered for a specific purpose. Its thermal expansion characteristics are carefully matched to those of borosilicate glass and certain ceramics. This means that when subjected to heat, both the metal and the glass expand at nearly identical rates. This compatibility prevents stress fractures and ensures a perfect, hermetic seal, making it an indispensable material in applications where a tight bond between metal and glass is absolutely critical under varying temperatures.

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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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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’ll find Kovar Bar and Rod playing a vital role in countless advanced technologies. It is essential for creating the airtight seals in electronic components like transistors, diodes, and integrated circuits, protecting sensitive inner parts. The aerospace and defence industries rely on it for critical components in satellites and communications systems. It’s also fundamental in manufacturing vacuum tubes, X-ray tubes, and various laser and lighting systems, proving its worth wherever metal must be permanently and reliably fused to glass without the risk of failure.

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