[doorgunner69]

Cannot say for the destroyer design of the Ftiz, but the Ticonderoga Aegis cruisers were mostly aluminum. I gather there was some steel surrounding critical spaces for a modicum of ballistic protection, but mostly aluminum. I would suspect similar desigh on this Aegis destroyer class.

All that electronic stuff above the waterline makes things top-heavy, hence the liberal use of aluminum in the design. The Tico class I rode on rolled like a drunken pig unless really hauling the mail.

That may affect your analysis of the damage. Steel (ACX) cuts through aluminum rather easily.

[TXnMA]

According to the Arleigh Burke class specs, the earlier classes' weak and fire-vulnerable aluminum was replaced with steel in the entire Arleigh Burke class...