Core Insights - SpaceX successfully completed the 11th test flight of its next-generation heavy-lift rocket "Starship" on October 13, marking a significant breakthrough in reusable heavy rocket technology [1] - The use of self-developed "30X cold-rolled stainless steel" for the rocket's exterior has garnered significant attention, with speculation about improvements in reducing nickel content to enhance hardness and achieving ultra-thin profiles through cold-rolling processes [1] Industry Implications - The Long March 9 heavy-lift rocket, referred to as the "Chinese version of Starship," also adopts stainless steel design, indicating recognition of the material's value in low-cost, reusable scenarios within the domestic aerospace sector [1] - However, research from the Chinese Academy of Sciences highlights that existing stainless steel grades like 301 and 304 still face challenges with toughness after cold-rolling, suggesting that advancements in thin-walled forming and welding technologies are necessary [1]