Metal foam for space constructs

So I'm writing a setting featuring asteroid mining Ã la Deep Space Industries, where the material mined is used for construction in space rather than brought to Earth. To maximize efficiency, I'm thinking of the main material for construction being steel foam (foamed steel?), but I don't know how feasible it is, and I don't know the math to find out. So I come to ask this:

Could steel foam be used to build a Stanford Torus-style space habitat with a radius of at least 1.8 kilometers and a width of around 500 meters, rotating at 1 rpm?

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Metal foam for space constructs

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