FIELD: metallurgy.
SUBSTANCE: invention relates to steel plate with thickness of 4-8 mm, specification NM450, used as material used in mines, on railway and in metallurgy. Steel plate has the following chemical composition, wt. %: C: 0.15–0.30, Si: 0.25–0.45, Mn: 0.80–1.20, Cr: 0.20–0.60, Mo: 0.10–0.50, Ni: 0.10–0.50, Al: 0.02–0.08, B: 0.0010–0.0030, P is less than or equal to 0.020, S is less than or equal to 0.010; the rest is Fe and unavoidable impurities.
EFFECT: obtaining thin plates with high level of mechanical properties.
7 cl, 1 tbl, 3 ex
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