STEEL Russian patent published in 2008 - IPC C22C38/58 

FIELD: metallurgy, iron and steel industry.

SUBSTANCE: invention refers to iron and steel industry, particularly to compositions of steel used in machine building. Steel contains carbon, silicon, manganese, chromium, vanadium, titanium, nickel, nitrogen, aluminium, cobalt, copper, molybdenum and iron at a following ratio, mas.%: carbon 1.0-1.5; silicon 0.5-1.0; manganese 6.0-10.0; chromium 0.5-1.0; vanadium 1.0-2.0; titanium 0.2-0.6; nickel 3.5-4.5; nitrogen 0.01-0.03; aluminium 0.1-0.2; cobalt 3.5-4.5; copper 0.6-1.0; molybdenum 5.0-5.5, iron - the rest.

EFFECT: producing steel of upgraded strength.

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