Experiments were made to determine the influence of the substructure of hot deformed low alloy steel austenite on the structure and mechanical properties of shear type γ → α transformation products. Four steels having 0.16–0.20%C and additions of Mo, V, and B were used. Immediately before γ → α transformation, austenite was deformed by rolling according to a programme simulating the reduction schedule in industrial plate mills. It was found that the increase in strength owing to the effect of austenite substructure on the structure of shear type γ → α transformation products was small and did not exceed 10%.
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