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Chemical Etching with Kovar

Kovar is well-known among engineers and is a crucial metal used in several industries, including medical, defense, and aerospace. Engineers appreciate this metal for its high corrosion resistance for applications in harsh environments

It is also unique for its thermal expansion properties, which ensure stability over a broad temperature range. 

We welcome your questions about how to use Kovar for your parts.

Types of Kovar used at E-Fab

Kovar is a nickel-cobalt-ferrous alloy known for its thermal expansion properties. Known as a soft material, Kovar is easy to machine and has several manufacturing benefits.


Call us to discuss which Kovar is right for your part.

Kovar Etching Capabilities

Panel SizeMin. 4"x6", max. 12"x18"
Panel ThicknessMin. 0.001”, max 0.040”
Hole SizeMin. 0.005” or 1.2x of material thickness
SpacingMin. same as material thickness
Inside & Outside RadiiMin. same as material thickness
Center-center hole distanceRefer to hole size and minimum spacing requirements
Etch Toleranceminimum of ± .0005”; increase minimum based on material thickness and feature type

Why Choose

Low Thermal Expansion Coefficient
High Corrosion Resistance
Ferromagnetic Properties
Low Thermal Conductivity
Kovar, a nickel-iron-cobalt alloy, stays intact during etching processes because it has excellent mechanical properties that help it withstand harsh chemical conditions. The metal’s thermal expansion properties are also excellent for aerospace and defense applications.

E-Fab manufacturers are experts at etching and forming kovar to precise standards and specifications.

Customers select Kovar for conductors, vacuum components, microwave tubes, and radio frequency electronics. E-Fab delivers precision Kovar parts for aerospace, defense, communications, and medical companies.

E-Fab is an industry leader in delivering innovative, accurate, and reliable parts thanks to decades of experience and expertise in a suite of processes.

We are known for our experience and expertise in:



Design Support

Photochemical Etching



High-frequency Substrate

CNC Machining





Supply Chain Acquisitions

We work with the world’s most important industries.

E-fab Aerospace
E-fab Industries Defense Army Tank
Eye Examination Test
E-fab Industries Technology
E-fab Telecom Ground Satelite
Containing Fuel in Auto Tank
Electr. Vehicles & Automotive

Contact us to discuss how we can deliver engineering and manufacturing solutions.