FIELD: metallurgy.
SUBSTANCE: steel contains carbon, manganese, silicon, sulphur, phosphorus, chrome, nickel, copper, nitrogen, aluminium and iron at following ratio of components, wt %: carbon 0.05 - 0.07, manganese 0.20 - 0.35, silicon ≤ 0.03, sulphur ≤ 0.025, phosphorus ≤ 0.02, chrome ≤ 0.1, nickel ≤ 0.1, copper 0.15 - 0.35, nitrogen ≤ 0.008, aluminium 0.02-0.07, iron - the rest. Steel allows ultimate strength σu = 270 - 410 N/mm2, yield strength σs ≤ 280 N/mm2, percent elongation δ4 ≥ 28%.
EFFECT: increased consumer properties of steel.
1 ex
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