On August 10, 2026, the Naval Undersea Warfare Center (NUWC) Keyport Division officially received NAVSEA (Naval Sea Systems Command) certification for its powder bed fusion (PBF) process using 17-4PH stainless steel, becoming the first Navy warfare center to achieve this qualification. The seven-year effort began under the Navy Innovation in Science and Engineering (NISE) program and was completed with support from the Submarine Industrial Base (SIB) initiative. Validation was performed on an EOS M290 system. During qualification, the Keyport team conducted power-outage simulations, pausing prints for 12 hours before restarting; destructive testing confirmed the interruption had no impact on final part quality. The next step is certification for 316L stainless steel. The qualified process is being shared across the Navy supply chain via the Digital SEA platform, allowing other Organic Industrial Base (OIB) sites to replicate it directly. With this official NAVSEA certification, Navy additive manufacturing moves from "project pilot" to "standard operating procedure." Following Keyport's approval, more than ten other Navy warfare centers are expected to adopt the process, creating systematic AM powder demand. Value for powder buyers: ① Official Navy certification of 17-4PH and 316L will trigger systematic AM powder procurement, scaling demand from kilogram-level R&D quantities to ton-level maintenance spare part volumes. ② Currently, 17-4PH stainless steel powder is primarily supplied by Carpenter, Sandvik, and Oerlikon; domestic powder manufacturers should closely monitor NAVSEA certification standards and civil-military integration opportunities. ③ Future certifications of nickel-based alloys such as Inconel 625 will further expand the high-end powder market for Navy applications.