AUSTENITIC CORROSION-RESISTANT STEEL Russian patent published in 2009 - IPC C22C38/58 C22C38/50 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy field, particularly to development of compositions of alloyed austenitic corrosion-resistant steels for atomic electric power installation with liquid-metal coolant. Steel contains components at following ratio, in wt %: carbon 0.05÷0.1, silicon 0.4÷0.8, manganese 1.0÷1.8, chrome 17.5÷19, nickel 8÷9, niobium 0.03-0.06, vanadium 0.02-0.07, titanium 0.05-0.15, sulphur ≤0.002, tin ≤0.015, lead ≤0.004, iron is the rest. Relation of total content of titanium, niobium and vanadium to carbon is not less than 1.6, and relation of chrome content to total content of nickel and manganese must be in the range 1.7÷2.0.

EFFECT: it is increased technological plasticity at hot working and welding-processing characteristics, that leads to receiving of hot-deformed semi-finished products with close-grained structure, allowing increased operating characteristics.

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