On August 19, LandSpace (蓝箭航天) launched its Zhuque-3 rocket from northwestern China carrying a satellite. About 6 minutes later, the first-stage booster landed on 4 legs at a site 390 kilometers downrange in Gansu province. The second stage later placed the satellite into orbit. LandSpace, one of China’s leading private rocket companies, became the second Chinese entity to recover an orbital-class first stage. The Long March 10B, built by China Aerospace Science and Technology Corporation (CASC), had done it roughly 6 weeks earlier, catching its booster in a net at sea. The two approaches reflect different optimization targets: nets save the weight of landing legs, while legs eliminate the need for a ship, which could speed turnaround.
The landing succeeded. The engineering story that matters, though, sits further back in the supply chain. LandSpace builds Zhuque-3’s body from ordinary stainless steel and hires engineers from China’s auto industry, where 34.5 million vehicles were produced in 2025. The company concentrates aerospace-specific technology on a few decisive points: the methane engines, thin-wall welding, and return flight control. LandSpace aims to route the rest through China’s general industrial base.
This division of labour could lower launch costs. But the potential rests on questions the August landing did not answer: refurbishment time, maintenance scope, and whether the reuse cycle can beat the manufacturing cycle. The reuse model began producing inspection data on August 19. It has not yet produced results.
A Rocket Priced Off the Steel Market
Traditional rocket bodies use aerospace-grade aluminum alloys. The most advanced, aluminum-lithium alloys, offer high strength-to-weight ratios. They also concentrate manufacturing knowledge inside state aerospace institutions. A rocket-tank designer at CASC noted in 2021 that Al-Li alloy prices ranged from Rmb 300,000 to Rmb 1m per ton, compared with roughly Rmb 100,000 for standard aluminum-copper. The equipment and expertise to fabricate large-diameter Al-Li tanks resided almost entirely within China’s state aerospace system.
Stainless steel operates in a different economy. Standard 304 stainless trades on a transparent spot market at about Rmb 12,600 to 14,550 per ton in late August 2026. LandSpace has not disclosed its alloy grade or procurement cost. Dong Kai, Zhuque-3’s deputy chief designer, described the company’s material only as “a mass-market product, tens of thousands of yuan per ton.” The gap between stainless and aerospace aluminum is more than a price ratio. It is a supply chain shift. China produced 40.9 million tons of stainless steel in 2025, about 64% of global output. Tank fabricators across the Yangtze Delta handle large stainless vessels as routine work. Few commercial suppliers outside the state aerospace system work with thin-wall aerospace aluminum at comparable scale.
Elon Musk followed the same logic when he switched Starship from carbon fiber to 301 stainless in 2018. Carbon fiber cost $135 per kilogram before waste. With 35% scrap, the effective price approached $200 per kilogram. Stainless cost $3 a kilogram, he told Popular Mechanics. But his decision also reflected thermal properties: steel’s high melting point reduces heat shielding, which simplifies reuse.
For China, the substitution carries a further implication. By choosing a material with a deep, competitive domestic supply base, LandSpace connects the rocket’s largest structural component to the general economy rather than the aerospace procurement system. The material is cheap. The question is what it takes to make commodity steel precise enough to fly.
The steel has a transparent market price. The process that makes it flyable does not.
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