STEEL FOR SHELL-TYPE STRUCTURES OF NUCLEAR POWER STATIONS Russian patent published in 2012 - IPC C22C38/60 C22C38/52 

FIELD: metallurgy.

SUBSTANCE: steel contains the following, wt %: carbon 0.13 - 0.18, silicone 0.05 - 0.10, manganese 0.30 - 0.60, chrome 2.70 - 3.00, nickel 0.60 - 0.80, molybdenum 0.60 - 0.80, vanadium 0.25 - 0.35, copper 0.01 - 0.05, niobium 0.04 - 0.06, aluminium 0.01 - 0.02, sulphur 0.002 - 0.007, phosphorus 0.002 - 0.007, arsenic 0.001 -0.005, antimony 0.001 - 0.005, stannum 0.001 - 0.005, cobalt 0.005 - 0.025, nitrogen 0.04 - 0.08; iron is the rest. Total content of phosphorus, stannum, antimony and arsenic does not exceed 0.02.

EFFECT: improving operating reliability, safety and service life of shells of nuclear reactors.

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