SpaceX pops huge Starship SN7 test tank on purpose in pressure test (videos)

Darkforce, what about its cryogenic properties? It's holding liquid oxygen in a potentially close to absolute zero environment, and of course it can also get hot in the sun - so hot outside and very cold inside. I heard that SpaceX has formulated their own variant of 314, which they will eventually use - it's more expensive than off-the-shelf so not used in this round of testing.