Is the Iron Man really made out of metal?

Question

If not, how do you know? (Use your scientific knowledge for this question.)

Answer 1

Yes I would assume he'd be made of metal ..various kinds.

The metal/metals need to be light weight, durable, malleable, ductile, resist high temperatures, unreactive to oxygen to prevent oxidation, and most of all but not necessarily be cheap because Starks is a rich ************ so he can afford expensive metals.