HEAT- AND RADIATION-RESISTANT STEEL Russian patent published in 2022 - IPC C22C38/54 C22C38/60 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, namely, to compositions of heat- and radiation-resistant steels for primary equipment of nuclear power plants. Steel contains components in the following ratio, wt.%: carbon 0.12 to 0.15, silicon 0.18 to 0.25, manganese 0.25 to 0.40, chromium 2.2 to 2.3, nickel 1.4 to 1.5, molybdenum 0.50 to 0.70, vanadium 0.11 to 0.12, nitrogen 0.0001 to 0.0080, oxygen 0.0001 to 0.0030, hydrogen 0.00001 to 0.00012, copper 0.005 to 0.03, cobalt 0.001 to 0.03, sulphur 0.0005 to 0.003, phosphorus 0.0005 to 0.004, arsenic 0.001 to 0.004, antimony 0.001 to 0.004, tin 0.001 to 0.004, bismuth 0.001 to 0.004, lead 0.001 to 0.004, aluminium 0.015 to 0.035, boron 0.001 to 0.003, if necessary, niobium 0.005 to 0.1, zirconium 0.005 to 0.05, and rare earth elements selected from a group including yttrium, neodymium, praseodymium, lanthanum, cerium, or a mixture thereof separately or in total 0.005 to 0.07, iron the rest.

EFFECT: steel exhibits high strength characteristics, increased maximum operating temperature, high visco-plastic properties, high resistance to heat and radiation embrittlement.

2 cl