FIELD: metallurgy.
SUBSTANCE: invention refers to metallurgy, and namely to a steel plate used for hot forming. A plate is made from steel having the following chemical composition, wt %: C: 0.05-0.40, Si: 0.001-0.02, Mn: 0.1-3, Al: 0.0002-0.005, Ti: 0.0005-0.01, O: 0.003-0.03, one or both of Cr and Mo in total 0.005-2, Fe and inevitable impurities are the rest. Average diameter of particles of composite oxides on the basis of Fe-Mn, which are distributed in the steel plate, is 0.1 to 15 mcm.
EFFECT: providing high strength and resistance to slow destruction of a part after hot forming.
9 cl, 8 dwg, 8 tbl, 2 ex
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