RADIATION-RESISTANT AUSTENITIC STEEL FOR THE WWPR IN-VESSEL PARTITION Russian patent published in 2019 - IPC C22C38/58 C22C38/52 C22C38/50 

FIELD: technological processes.

SUBSTANCE: invention relates to metallurgy of alloyed steels and alloys, which are intended for use in nuclear power engineering during production of main equipment of nuclear power plants, namely for production of in-vessel partition of water-and-water power reactors (WWPR) with resource of not less than 60 years. Radiation-resistant austenitic steel contains carbon, silicon, manganese, chromium, nickel, titanium, molybdenum, calcium, lanthanum, cerium and iron at the following ratio of elements, wt.%: C 0.06÷0.10; Si 0.40÷0.60; Mn 1.50÷2.00; Cr 15.0÷16.0; Ni 24.00÷26.00; Mo 0.70÷1.40; Ti (5*C+0.10)÷0.80; Ca 0.001÷0.003; La+Ce 0.001÷0.005; P ≤0.035; S ≤0.008; N ≤0.020; Co ≤0.025; Cu ≤0.3; Sn ≤0.001; Sb ≤0.001; As ≤0.001; Bi ≤0.001; Pb ≤0.001; iron – balance.

EFFECT: higher resistance to swelling when exposed to neutron flows at doses of up to 150 shifts per atom (spa) while maintaining the required mechanical properties.

1 cl, 3 dwg, 3 tbl