On August 21, 2026, Deep Blue Aerospace announced that its 'Thunder-RS' liquid oxygen kerosene engine completed a 100-second long-duration hot-fire test at its test facility, achieving a measured thrust of 1297.5 kN (approximately 132.3 tons-force) with zero anomalies throughout, marking the first time it has crossed the 100-second steady-state threshold. This engine is the largest-thrust gas generator cycle pintle injector liquid oxygen kerosene engine in China, with over 85% of its components manufactured as single-piece structures via metal 3D printing. The Thunder-RS serves as the primary propulsion system for the large reusable rocket 'Nebula-2', with 11 engines clustered in the first stage, providing a low Earth orbit payload capacity of 25 tons, with its maiden flight planned for 2027. The engine was assembled and delivered at the Wuxi High-tech Zone, and it took only a few months from the initial complete engine rollout to the completion of the long-duration test. The long-duration test is a prerequisite for validating the 11-engine cluster and vertical recovery. Successfully passing the 100-second steady-state threshold marks the engine's entry into the engineering maturity phase. The application of metal 3D printing in rocket engines is transitioning from demonstrative validation to batch production engineering. The single-piece manufacturing of core components such as combustion chambers, injectors, and turbopumps can significantly reduce weight and shorten manufacturing cycles. Domestic commercial aerospace companies (including LandSpace, Space Pioneer, and iSpace) are fully adopting this approach, directly driving up the bulk procurement demand for high-temperature alloys, copper alloys, and titanium alloy spherical powders. Value for powder purchasers: ① The increasing volume of 3D-printed components in commercial aerospace engines boosts demand for GH4169/IN718-type high-temperature alloy powders, CuCrZr copper alloy powders, and TC4 titanium powders, with the laser powder bed fusion (LPBF) process using 15-53μm particle size ranges being the primary application; ② Engine manufacturers impose high requirements on powder batch consistency and aerospace-grade quality system certification, so powder suppliers capable of providing stable batch-to-batch supply will gain priority access to the supply chain; ③ Monitor the upcoming 11-engine cluster test milestones for Nebula-2, as the period before the 2027 maiden flight is a critical window for powder sample submission and qualification.