Singapore-based propeller manufacturer Mencast Marine has received dual certification from Lloyd's Register and the American Bureau of Shipping (ABS), with its product recognized by both classification societies as the world's first fully additive-manufactured propeller. This milestone was achieved in collaboration with Singapore's Agency for Science, Technology and Research (A*STAR), confirming that its WAAM process meets classification standards and is suitable for maritime deployment. The certification builds on Singapore's first 3D-printed marine propeller pilot in 2023 (in partnership with NAMIC and the Singapore University of Technology and Design). Mencast uses a robotic arm to deposit bronze alloy layer by layer to form the propeller: manufacturing time is halved compared with previous methods, and the carbon footprint of a 200 kg propeller is reduced by 36% (a reduction of 1,743 kg CO₂, equivalent to about 9,500 km driven by an electric vehicle). Previously, the company relied on labor-intensive conventional sand casting and had to import bronze ingots; after adopting additive manufacturing and AI, overall productivity has increased by up to 30%, and algorithms developed with A*STAR can generate more than 10,000 blade iterations within days (compared with only about 20 in several weeks previously). The company plans to build manufacturing capacity overseas, enter higher-value markets such as large offshore vessels and special military platforms, and views digital and additive capabilities as a path into adjacent industries such as aerospace. In industry context, Damen/RAMLAB's WAAMpeller in 2017 was the world's first class-approved 3D-printed propeller (1.35 m/400 kg nickel-aluminum bronze); Mencast's "first" here lies in being "fully additive-manufactured." The UK's D.E.E.P project is also advancing nickel-aluminum bronze blade printing; the U.S. Navy expects its demand for WAAM parts to grow from 400 units in 2026 to 1,600 units in 2030. Value for powder buyers: ① The shift toward additive manufacturing of marine propellers directly drives demand for nickel-aluminum bronze (NiAl Bronze) and copper-based alloy wire/powder, and suppliers can pay attention to classification society-certified grade requirements; ② dual class approval opens export markets beyond Southeast Asia and Europe, and the order pool for additive manufacturing of marine components will expand; ③ the additive manufacturing of large propulsion components is still in early commercialization, with limited near-term volume, so it is advisable to monitor the pace of bulk order implementation.