NASA and ESA teams have successfully tested metal 3D printing aboard the International Space Station (ISS), marking a milestone in in-space additive manufacturing. The ESA-led “Metal3D” project, developed in partnership with Airbus Defence and Space, AddUp, and Cranfield University, debuted the first-ever metal printer capable of operating in microgravity—with no gravity-assisted processes.
During its initial demonstration, the printer extruded a stainless steel ‘S-curve’ test specimen, later returned to Earth for analysis. The project validated that space-based manufacturing of durable, load-bearing metal components is viable in orbit.
These results signal a major leap forward in space self-sufficiency—enabling repairs and custom tooling without waiting for Earth resupply. Astronauts could soon print replacement components or structural parts on demand, especially for long-duration missions to the Moon and Mars.
