Kovar® Metal Parts
Kovar is desired over other alloys due to its ability to form reliable, stress-free glass-to-metal and ceramic-to-metal hermetic seals. Mismatched thermal expansion in these seals causes cracking and seal failure — Kovar eliminates this problem.
Kovar Chemical Etching: Advanced Processing Solutions
Kovar chemical etching is essential for industries that require both dimensional accuracy and the unique material performance of Kovar, an iron-nickel-cobalt alloy designed for tight control over thermal expansion. At ChemTecUSA, the chemical etching process produces burr-free and stress-free components while maintaining the alloy’s original grain structure and mechanical properties. These characteristics are critical for sectors such as aerospace, defense, medical devices, and high-end electronics, where a single deviation in stability or performance can compromise the entire system.
Kovar Demands Chemical Etching
The value of Kovar lies in its ability to maintain dimensional stability across extreme temperature changes, making it a preferred choice for hermetic glass-to-metal seals, controlled environment housings, and other mission-critical components. While conventional methods such as stamping, CNC machining, or laser cutting can remove material, they also introduce heat-affected zones, micro-cracks, distortion, or residual stress. These byproducts reduce the very qualities that engineers specify Kovar for. Chemical etching avoids these issues entirely by using controlled chemical reactions to shape the material without mechanical force. This preserves Kovar’s metallurgical properties, ensuring that every etched component performs as intended under demanding operating conditions.
ChemTecUSA Process Advantages
ChemTecUSA’s photochemical machining (PCM) method offers precision that surpasses what traditional fabrication can achieve. Tolerances as tight as ±0.0005 inches are consistently attainable, and complex geometries—including undercuts, fine slots, and intricate perforation patterns—can be created without secondary finishing operations. The absence of recast layers, oxidation, or burr formation yields edge quality superior to that of laser cutting. Because no heat or force is applied, the material maintains its original microstructure, eliminating problems such as work hardening or grain growth. For engineers, this means parts that not only meet dimensional specifications but also retain the long-term reliability required in sensitive assemblies.
Engineering Partnership with ChemTecUSA
Beyond processing, ChemTecUSA provides design collaboration that helps customers realize the full potential of Kovar chemical etching. Early design reviews identify features that may be difficult or costly to produce, enabling modifications that enhance performance and reduce development time. Rapid prototyping is another strength—photographic tooling can be developed in just a few days, enabling quick iterations without the expense of complex dies or lengthy programming. Once designs are validated, ChemTecUSA scales seamlessly from prototype runs to full production, supported by ISO 9001:2015 certification, ITAR compliant, and a vertically integrated facility that includes plating, forming, and finishing.
Applications Across Industries
Kovar chemical etching supports a wide range of advanced applications. In electronics and telecommunications, etched Kovar is used for hermetic package lids, RF and microwave components, optical encoder disks, and intricate EMI/RFI shielding. Aerospace and defense programs rely on etched Kovar for sensor housings, avionics shielding, inertial measurement unit components, and high-reliability interconnects in spacecraft. Medical device manufacturers specify etched Kovar for implantable feedthroughs, surgical instruments, and precision housings for diagnostic equipment. The alloy also plays a vital role in energy and scientific instrumentation, from bipolar plates in fuel cells to cryogenic components and parts for spectrometers. In each case, chemical etching enables design complexity and repeatability that alternative manufacturing methods cannot match.
Technical Capabilities
ChemTecUSA’s facility in Rhode Island supports material thicknesses ranging from 0.0005 to 0.050”, with the capability to extend further for specific programs. Feature sizes as small as 0.004” are achievable, and surface finishes of Ra 32 microinches or better are standard. Prototype lead times and production runs are customized based on your project and will be provided at the time of quote. Each lot of Kovar is traceable, and certificates of conformance are provided to support compliance with aerospace, defense, and medical requirements.
CHEMTECUSA
Why Engineers Choose Kovar® with Etching
Kovar (ASTM F-15, UNS K94610) is uniquely positioned for applications requiring compatibility with borosilicate glass due to its coefficient of thermal expansion. The alloy remains stable at temperatures up to 450°C, exhibits magnetic properties valuable in controlled environments, and can be readily electroplated with gold, nickel, or tin for enhanced functionality. When these material advantages are combined with ChemTecUSA’s chemical etching process, engineers gain the ability to design parts that are both structurally sound and manufacturable at scale.
Partnering for Precision
ChemTecUSA streamlines the production path. CAD files or design sketches are reviewed for manufacturability, with photographic tooling created in a matter of days rather than weeks. First article inspections include full-dimensional reports and certifications. Once approved, production scales seamlessly from prototypes to high-volume runs, ensuring consistent quality and on-time delivery. Operating from a U.S.-based, ITAR-compliant, and ISO-certified facility, ChemTecUSA ensures domestic control, intellectual property protection, and decades of expertise in specialty alloys. When your program requires precise, stress-free Kovar components, our team is ready to deliver. Contact us today for a Kovar chemical etching quote.