0000950152-09-003937 8-K 1 20090421 8.01 20090422 20090421 ALLEGHENY TECHNOLOGIES INC 0001018963 3317 251792394 DE 1231 8-K 34 001-12001 09762492 1000 SIX PPG PLACE PITTSBURGH PA 15222 4123942800 100 SIX PPG PLACE PITTSBURGH PA 15222 ALLEGHENY TELEDYNE INC 19960716 8-K 1 l36195ae8vk.htm FORM 8-K