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Old December 15th 18, 06:03 AM posted to sci.space.policy
David Spain
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Default BFS drops composite construction

On 12/10/2018 1:39 PM, Fred J. McCall wrote:

Well, that would be cost/schedule. Given his wording about "heavy
metal" I don't expect it will be the 'conventional' metal.


[snip]

Musk was asked several times just which metal he was referring to and
avoided the question each and every time.


A variant of Inconel or SpaceX's SX-300? They certainly have experience
with it. Maybe they plan to spin cast it in solutionized form and weld
two hemispheres after age hardening?

Stupid wild ass guesses are fun...

Note Wikipedia references it as useful in "pressure vessels" (under
Uses, see)

https://en.wikipedia.org/wiki/Inconel

Dave