Kovar Bar and Rod

Nestled in the heart of Amman, Jordan, Sabra Metals has built a reputation as a trusted manufacturer and supplier of specialized alloys, with a particular expertise in Kovar. We understand that certain advanced engineering challenges demand materials with unique characteristics, and our consistent production of high-quality Kovar bar and rod is a direct response to those precise needs. Our commitment is to provide reliable solutions that form the backbone of innovative technologies across the globe.

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Kovar Round Bars

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What is Kovar Bar and Rod?

Our Kovar bar and rod are defined by a specific composition of iron, nickel, and cobalt, a formula scientifically designed to have a thermal expansion rate that closely matches common types of hard glass and ceramic. This controlled expansion is its key feature, ensuring a stable and reliable seal. Mechanically, it offers good tensile strength and is readily machinable, allowing engineers to shape it into the exact components required for highly specialized assemblies.

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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 Sabra Metals?

Packaging

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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

The primary use for Sabra Metals’ Kovar bar and rod is in creating these crucial hermetic seals, where a metal component must be permanently bonded to glass or ceramic without cracking under temperature fluctuations. You’ll find these essential parts in the assembly of power tubes, x-ray equipment, and laser housings. Furthermore, its properties make it invaluable in the aerospace and telecommunications industries for components in satellites and other sensitive electronic systems where long-term integrity is absolutely non-negotiable.

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