Kovar Bar and Rod

Nestled in the heart of Kinshasa, Congo, Sadiki Metals stands as a dedicated manufacturer and supplier, deeply rooted in the local industrial landscape. We take pride in producing high-quality Kovar bar and rod, materials engineered for precision and reliability. Our commitment extends beyond mere supply; we are a partner to industries where exacting standards are non-negotiable, providing essential materials that form the backbone of advanced technological applications right from the heart of Africa.

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Kovar Round Bars

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Kovar Square Rods

What is Kovar Bar and Rod?

This specialized alloy is precisely composed of iron, nickel, and cobalt, a formulation celebrated for its unique thermal expansion characteristics. The key strength of Kovar bar and rod lies in its ability to expand and contract at a rate nearly identical to borosilicate glass and certain ceramics. This, combined with its excellent mechanical properties like good ductility and strength, makes it exceptionally reliable when a permanent, hermetic seal between metal and glass is absolutely essential.

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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

The primary use for Kovar bar and rod is in creating these crucial seals, which is why you’ll find them at the core of countless electronic and scientific devices. They are indispensable in the production of transistors, integrated circuits, and vacuum tubes, ensuring the sensitive components inside are perfectly protected. Beyond electronics, this material is vital in aerospace instrumentation, laser systems, and any application where a metal component must be permanently bonded to glass without the risk of fracture from temperature changes.

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