It actually had been used. And when you look at the material properties of stainless steel, especially if it's been very like full hard grain, hardened stainless steel at Cryogenic temperature, The strength weight [of stainless steel at cryogenic temperature] is actually similar to carbon fiber. So if you look at material properties at room temperature, it looks like the steel is going to be twice as heavy. (2:00:49–2:00:54)
CLAIM
Asserts that stainless steel at cryogenic temperatures has a strength-to-weight ratio similar to carbon fiber.
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