What materials are Oil Tankers Made of? Specifically the Exxon Valdez Oil Tanker...?

At around Midnight on March 24 1989 this ship hit the Bligh Reef and a rock or something punctured through its hul and I was just wonderin what it was made of.. Thnx for the help!What materials are Oil Tankers Made of? Specifically the Exxon Valdez Oil Tanker...?
An older oil tanker like the Exxon Valdez is constructed of marine grade steel over a structural steel framework.





It was a single-wall tanker - there was nothing between the holding tank and the ocean other than a single wall of steel plate, though the holding tanks often had in inner coating of an oil resistant membrane to avoid small leakage.





Now, all modern oil tankers are double-walled around the holding/cargo tanks and some even are triple-walled, with ';interstitial'; monitoring to detect leakage.What materials are Oil Tankers Made of? Specifically the Exxon Valdez Oil Tanker...?
An Oil tanker is made of solid steel with lots of welds to hold it together.