FIELD: metallurgy.
SUBSTANCE: steel contains carbon, silicon, manganese, sulphur, phosphorus, chromium, nickel, copper, aluminium, calcium and iron at following ratio of components, wt %: carbon 0.37-0.42, manganese 0.50-0.80, silicon 0.20-0.30, phosphorus not more, than 0.030, sulphur not more, than 0.030, chromium 0.90-1.10, nickel not more, than 0.30, copper not more, than 0.30, aluminium 0.015-0.035, calcium 0.0001-0.005, iron - the rest. In hot rolled state ratio of ultimate strength (σb) to contraction of cross section (ψ) is less or equal to 16.
EFFECT: rounds possess good plastic characteristics at maintaining high strength properties.
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