Giant steel objects are much harder to keep intact, to the point where non iconic objects are easier to replace once than maintain for 100+ years.
What about the Eiffel Tower? Or Blackpool Tower. That proves it can be done.
What about the Eiffel Tower? Or Blackpool Tower. That proves it can be done.
(Saying that, for example, 300-series stainless, around 30-40% chromium and nickel, "is iron", could be fairly criticized this way. Mild steel not so much, and that was what I really had in mind with the statement, although I concede I didn't say so.)