A portion of the patent, titled “Ultra-Hard Cold-Worked Steel Alloy,” reads as follows: "In some embodiments, at least one exterior panel and/or body of the vehicle comprises the steel alloy.

Tesla Cybertruck’s stiff steel structure, sharp design worry safety experts By Reuters Published Dec. 8, 2023, 12:14 p.m. ET ...

Starting with a nearly impenetrable exoskeleton, every component is designed for superior strength and endurance, from Ultra-Hard 30X Cold-Rolled stainless-steel structural skin to Tesla armor glass.