In the beginning of 60-s cast turrets with composite armor were introduced for T-64, T-64A (later for T-72A and T-80B) which had a significant protection against shaped-charge projectiles and APDS rounds. Such protection provided Soviet tanks with protection superiority over western designed tanks of that time like M60A and “Chieftain”. But in same period of time in the 1-st half of 70-s it became evident, that future development of tank cast turrets has no long term perspectives comparing to welded design. An experimental turret was tested with results published in 1977 special literature.
Development of welded turrets for post-WW2 tanks in USSR, Russia and Ukraine