Closest I've found is this thread - it at least gives the nomenclature of the explosives used, and the composition of it. It also leads to a discussion of the Bismark's armor, and the effectiveness of the torpedoes it was designed to resist - one would think that it would be about what the German torpedoes were capable of at the time of the design.
http://www.kbismarck.org/forum/viewt...644fda231667aa
Still looking .....