Cast iron or carbon steel. The answer should be cast iron but if you can justify yourself otherwise I'll listen 😆
Discussion
A giant slab of steel from the blown out hull of a shipwrecked WWI dreadnaught that was reclaimed from the bottom of the seafloor. 😂
You say that as a joke... but what if I told you there's a cast iron restorer in Michigan that actually did do something like that; recovered from the bottom of Lake Huron. The journey from recovered to restored is really something. And they sell at some market in Michigan (I think near Grand Rapids). https://www.reddit.com/r/castiron/s/pzixnPAul2
That is very cool. Love the restoration process. Cast iron is built to last.