STEEL Russian patent published in 2009 - IPC C22C38/50 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy field, particularly to manufacturing of steels which can be used for producing of sheet products. Steel contains carbon, silicon, manganese, chrome, nickel, copper, aluminium, titanium, argon, niobium, sodium and iron, with following ratio, wt %: carbon 0.1 - 0.2, silicon 0.4 - 0.7, manganese 0.7 - 1.1, chrome 0.3 - 0.4, nickel 0.2 - 0.4, copper 0.4 - 0.6, aluminium 0.005 - 0.015, titanium 0.05 - 0.1, argon 0.002 - 0.01, niobium 0.1 - 0.15, sodium 0.0002 - 0.0003, iron is the rest.

EFFECT: steel hardening.

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