STEEL Russian patent published in 2018 - IPC C22C38/54 C22C38/58 

FIELD: metallurgy.

SUBSTANCE: invention relates to steel, which can be used in engineering. Steel contains 0.7–0.9 % by weight of carbon, 0.15–0.35 % by weight of silicon, 1.0–1.5 % by weight of manganese, 0.5–0.8 % by weight of chromium, 0.2–0.25 % by weight of molybdenum, 12.8–13.6 % by weight of nickel, 2.4–2.6 % by weight of copper, 2.2–2.6 % by weight of tantalum, 0.1–0.15 % by weight of niobium, 0.08–0.12 % by weight of boron, 0.35–0.45 % by weight of vanadium, iron – the rest.

EFFECT: strength of steel is increased.

1 cl, 1 tbl