GRCop‑42 made a real splash in the industry when NASA introduced it. The copper‑chromium‑niobium alloy powder is developed for additive manufacturing of space components operating under extreme thermal and mechanical loads.
The material combines high thermal conductivity with high strength and the ability to retain its properties at elevated temperatures.
The development of this material underscores and reminds us of the importance of material readiness levels in aerospace applications enabled by AM. As a material producer, Sandvik understands the criticality of material development in aerospace production.
With that in mind, the company introduces Osprey® GRCop-42 copper alloy powder. The announcement is made a few weeks after Sandvik announces it is divesting its Additive Manufacturing business unit to Mimir.
The company says the material is engineered with unsurpassed cradle-to-gate traceability to reduce qualification risk in space manufacturing.
“Osprey® GRCop-42 is developed for advanced space propulsion applications, designed to withstand the harsh environments found in regeneratively cooled rocket engine components”, says Luke Harris, Sales Director Business unit AM, Powder Solutions, Sandvik. “To achieve stable, repeatable powder production, this alloy places exceptionally high requirements on melting practice, impurity control and process discipline.”
This alloy is intended for additive manufacturing of components such as fuel injector faces and combustion chamber linings, where efficient heat transfer, tight tolerances and predictable material behavior are critical throughout qualification and production, Sandvik says.
What changes in Sandvik’s version?
Through extensive metallurgical development and adaptations of its Vacuum Inert Gas Atomization (VIGA) process, Sandvik has established controlled and repeatable production of GRCop‑42.
The powder is atomized under inert gas using a highly automated production flow that protects the material from oxidation throughout the entire process, resulting in a metallurgically clean powder with consistent batch‑to‑batch characteristics.
Osprey® GRCop‑42 is already supporting customer qualification and production programs, where repeatable powder quality, predictable performance and complete documentation are essential. This experience provides valuable feedback into process control and supports reliable supply for ongoing and future space manufacturing applications.
Osprey® GRCop‑42 is produced within the company’s AS9100‑certified quality system and supported by full cradle‑to‑gate traceability. Every step – from raw materials and melting practice to atomization parameters and testing powder batches – is documented, helping customers reduce qualification risk, audit friction and schedule uncertainty.
Now fully integrated into the Sandvik product portfolio, Osprey® GRCop‑42 is available in volumes suitable for both qualification activities and ongoing production, supported by the company’s long‑standing expertise in gas‑atomized metal powders and the well‑established Osprey® trademark, trusted for premium quality and batch‑to‑batch consistency.
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Source: NASA, Three-Dimensional Printing GRCop-42, published in 2018.
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