Some historical stats for US BB's and CV's -- see section "Ship Hardness" at the end of this document:
http://electraforge.com/brooke/flightsims/scenarios/200706_husky/rules.html
Copied here for ease of reference:
Research on ship hardness of battleships is based on what it took to sink battleships at Pearl Harbor and what it took to sink US carriers throughout WWII. The battleship data is from
http://plasma.nationalgeographic.com/pearlharbor/history/pearlharbor_facts.html , and the carrier data is from Wikipedia on various carriers. For carriers that weren't sunk, some of them survived mutliple attacks separated by time or by ability to repair some damage in between attacks. For those, I list only the estimated most-damaging attack that they survived and not all the attacks. The torpedo typically carried by the Japanese B5N "Kate" torpedo bomber was the type 91 torpedo, which typically had 529 lbs of explosive. The largest torpedo typically carried by Japanese submarines was the type 95 torpedo, which had 893 lbs of explosive. The most-common bomb carried by the Japanese D3A "Val" divebomber had 551 lbs of explosive.
Battleship Damage Taken -- Result
California (BB-44) 2 torpedo hits; 1 bomb hit -- sunk
Maryland (BB-46) 2 bomb hits -- not sunk
Oklahoma (BB-37) 5 torpedo hits -- sunk
Tennessee (BB-43) 2 bomb hits -- not sunk
West Virginia (BB-48) 6 torpedo hits; 2 bomb hits -- sunk
Arizona (BB-39) 1 torpedo hit; 8 bomb hits -- sunk
Pennsylvania (BB-38) 2 bomb hits -- not sunk
Nevada (BB-36) 1 torpedo hit; 6 bomb hits -- not sunk
Utah (BB-31) 2 torpedo hits -- sunk
Carrier Damage Taken -- Result
Lexington (CV-2) 2 torpedoes; 3 bombs -- sunk
Saratoga (CV-3) 6 bombs -- not sunk
Yorktown (CV-5) 2 torpedoes; 3 bombs -- sunk
Enterprise (CV-6) 3 bombs -- not sunk
Wasp (CV-7) 2 torpedoes -- sunk
Hornet (CV-8) 3 torpedoes; 5 bombs -- sunk
Essex (CV-9) kamikaze -- not sunk
Yorktown (CV-10) 1 bomb -- not sunk
Intrepid (CV-11) 1 torpedo -- not sunk
Franklin (CV-13) kamikaze -- not sunk
