“…where subscripts Z and F refer to cementite and ferrite, respectively. The Pitsch OR [17] occurs when pearlite nucleates on a "pure" boundary of austenite, while Bagaryacki OR [1] appears when pearlite nucleates on pre-eutectoid cementite [5,7] (or on pre-eutectoid ferrite [19,20]). Simultaneously, the majority of results indicate that regardless a carbon content in steel and a degree of undercooling, dominating in a structure was the Pitsch OR (Pitsch [17] -carbon steels 0,25% C, 0,7% C, 1,25% C, Stackleton and Kelly [22] -low-alloy steels from 0,52% C to 0,96% C and Hadfield steel , Lupton and Warrington [9] -carbon steel 0,8% C, Ohmori [16] -steel 0,19% C, 0,0087% B.…”