HEAT-RESISTANT CHROME-NICKEL ALLOY WITH AUSTENITIC STRUCTURE Russian patent published in 2012 - IPC C22C30/00 C22C38/00 C22C19/05 

FIELD: metallurgy.

SUBSTANCE: invention can be used during manufacture of castings for headers and reaction pipes of reformers of large-capacity ammonia and methanol units with operating temperature of up to 1200°C and pressure of up to 50 atm. There proposed is heat-resistant chrome-nickel alloy with austenitic structure, which contains the following components, wt %: carbon 0.05-0.10, chrome 21-23, nickel 30-33, niobium 0.6-1.5, cerium 0.06-0.12, silicium 0.01-0.95, manganese 0.001-0.55, vanadium less than 0.10, titanium less than 0.10, aluminium 0.001-0.10, tungsten less than 0.10, sulphur less than 0.03, phosphorus less than 0.03, lead less than 0.01, stannum+arsenic+zinc+antimony less than 0.01, molybdenum less than 0.20, less than 0.10, iron - the rest, when the following conditions are met: %Ni+32%C+0.6%Mn+%Cu=31.601-34.950%, %Cr+3%Ti+%V+%Mo+1.6%Si+0.6%Nb=23.170-26.090%.

EFFECT: increasing heat resistance of alloy due to forming homogeneous austenitic structure.

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