HOT ROLLED STAINLESS STEEL OF HIGH STRENGTH Russian patent published in 2008 - IPC C22C38/58 

FIELD: metallurgy.

SUBSTANCE: invention refers to metallurgy and can be used in aircraft building, ship building, automobile industry, in production of process equipment for oil, gas and chemical industry. Steel of upgraded hardness contains, mass %: carbon 0.03-0.05; silicon 0.3-0.5; manganese 3.0-5.0; copper 0.5-1.0; nickel 10.0-12.0; chromium 16.0-20.0; nitrogen 0.05-0.15; niobium 0.2-0.4; boron 0.03-0.05; zirconium 0.1-0.2; vanadium 0.2-0.4; aluminium 0.1-0.2; strontium 0.001-0.002; iron - the rest.

EFFECT: upgraded hardness of steel.

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