Musk explains why Starship uses steel over aluminum: heat resilience and no paint

DimaZeniuk · x · 2026-09-08

Elon Musk outlined the engineering rationale for Starship's stainless steel structure: aluminum easily melts from re-entry and engine heat; steel is far more resilient to both ascent and re-entry heating; and steel requires no paint, which is hard to maintain through cryogenic cycles.

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