Sintavia’s new technology for 3D printing the copper alloy GRCop-42 combines a proprietary parameter set and post-processing heat treatment. (Photo: Business Wire)

HOLLYWOOD, Fla.—Sintavia, LLC has developed proprietary 3D printing technology for GRCop-42, the preferred copper alloy used by NASA and private space flight companies for rocket thrust chamber assemblies, the company said in a release. Sintavia is a designer and 3D printer of what it calls “a new generation of flight and launch components.”

The new technology, described as a combination of a proprietary parameter set and post-processing heat treatment, was developed on an EOS GmbH M400-4 printer. It is reported to yield GRCop-42 components with minimum density of 99.94 percent, minimum tensile strength of 28.3 ksi, minimum ultimate yield strength of 52.7 ksi, and minimum elongation of 32.4 percent.

The technology avoids the use of a hot isostatic press in post-processing steps, thereby reducing the time, complexity, and cost of production, Sintavia said in the release.

“Today’s announcement marks the first time we have publicly disclosed Sintavia’s ongoing material development efforts,” said Sintavia Vice President of Engineering Pavlo Earle, in the release. “As a company, we are uniquely positioned to unlock the potential of printing difficult materials cost-effectively and with excellent mechanical properties. The fact that we were able to achieve these levels of performance on GRCop-42—by all indications a very difficult metal for additive manufacturing—further cements Sintavia’s role as the global leader in the application of AM within the aerospace, defense, and space industry.”

Earle added that Sintavia is currently developing proprietary standards for other materials, including refractory alloys, for use across the aerospace, defense, and space industry. The company (www.sintavia.com) holds multiple Nadcap and other aerospace accreditations.

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