COLD RESISTANT SHEET STEEL FOR HIGH LOADED STRUCTURES OF CONTAINER EQUIPMENT OF NUCLEAR AND THERMO-NUCLEAR POWER Russian patent published in 2011 - IPC C22C38/58 C22C38/50 

FIELD: metallurgy.

SUBSTANCE: steel contains carbon, silicon, manganese, chromium, nickel, copper, vanadium, niobium, aluminium, sulphur, phosphorus, titanium, yttrium, nitrogen, arsenic and iron at following ratio of components, wt %: carbon 0.05 - 0.09, silicon 0.5 - 0.7, manganese 1.2 - 1.5, chromium 0.05 - 0.25, nickel 0.05 - 0.30, copper 0.05 - 0.25, vanadium 0.01 - 0.09, niobium 0.01 - 0.07, titanium 0.003 - 0.05, yttrium 0.001 - 0.005, nitrogen 0.005 - 0.01, aluminium 0.02 - 0.05, arsenic 0.003 - 0.01, sulphur 0.003 - 0.01, phosphorus 0.003 - 0.01, iron - the rest. Value of carbon equivalent of steel does not exceed 0.038 %, summary contents of vanadium and niobium does not exceed 0.12 %, while summary contents of sulphur, phosphorus and arsenic is not over 0.022 %.

EFFECT: improved combination of basic physical-mechanical and service properties facilitating raised deformation ability and resource characteristics of high load structures of container equipment.

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