6K Additive and Siemens Energy Boost Nickel Powder Circularity

3D printing materials Nickel-based alloys: 6K Additive signs long-term supply agreement with Siemens Energy

2026-02-27 Source: 6K Additive 1 min Reading Time

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6K Additive signed a global long term supply agreement under which Siemens Energy will supply spent nickel alloy powder from its additive manufacturing facilities for use as feedstock in the company’s proprietary Unimelt microwave plasma production system.

Closing the loop: the Unimelt system converts Siemens Energy’s spent nickel alloy powder into high performance additive manufacturing powders(Source: 6K Additive) — Closing the loop: the Unimelt system converts Siemens Energy’s spent nickel alloy powder into high performance additive manufacturing powders
(Source: 6K Additive)

Additive manufacturing company 6K Additive will utilize nickel based superalloy revert streams from Siemens Energy as feedstock for the production of high performance additive manufacturing powders. By converting production residues into certified feedstock, the partners aim to retain valuable alloying elements within the industrial cycle and advance material circularity in the additive manufacturing sector.

6K Additive converts this feedstock into virgin, additive manufacturing ready metal powder using its advanced Unimelt process, supporting material efficiency and reduced environmental impact across the AM supply chain.

To date, 6K Additive has processed close to 20 tons of nickel superalloy powder originating from Siemens Energy, with the resulting material supplied into the broader additive manufacturing market. The collaboration demonstrates how industrial revert materials can be effectively upcycled into high quality powders, contributing to a more resilient and sustainable metal AM ecosystem.

“At Siemens Energy, sustainability and responsible resource use are integral to how we approach advanced manufacturing,” said Steve Sarcander, Head of Finance, Additive Manufacturing of Siemens Energy. “By supplying our revert material into 6K Additive’s production process, we are supporting circular material flows while helping to reduce waste and emissions associated with metal powder production. Partnerships like this play an important role in strengthening the overall additive manufacturing value chain.”

6K Additive’s Unimelt microwave plasma platform is a production scale system capable of converting certified chemistry machined millings, turnings, and recycled feedstock into premium, AM ready metal powder. According to the company, it is the world’s only production scale microwave plasma system, offering a highly uniform, contamination free processing zone.

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