FIELD: ferrous metallurgy. SUBSTANCE: steel has components at the following ratio, wt.-%: carbon 0.12-0.24; manganese 0.8-1.2; silicon 0.2-0.5; chrome 2.9-3.4; nickel 0.9-2; molybdenum 0.25-0.9; vanadium 0.03-0.15; niobium 0.02-0.05; calcium 0.005-0.03, and iron - the rest. EFFECT: increased strength at cyclic loading, retained level of mechanical property at negative temperatures. 4 tbl
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