Elon Musk @elonmusk
@flcnhvy @Erdayastronaut @Cor_SPACE Just SX500 so far, but we use many superalloys developed by others, eg Inco 718+. If anyone has 718++, that would be helpful haha. Massive engineering work in the casting, printing & machining of Raptor — far more than in design of the engine itself! — PolitiTweet.org