HEAT RESISTANT ALLOY FOR STRUCTURES OF HIGH TEMPERATURE INSTALLATIONS Russian patent published in 2010 - IPC C22C38/00 C22C19/05 

FIELD: metallurgy.

SUBSTANCE: invention is designed for implementation at production of various heat exchanging equipment of stationary and transport reactors, and also stem-power and gas-turbine installations operating under conditions of continuous high temperature performance. Here is disclosed alloy containing wt %: carbon 0.01-0.04, silicon 0.2-0.5, manganese 1.0-1.5, chromium 18.0-20.0, nickel 53.0-56.0, molybdenum 5.0-7.0, tungsten 2.0-3.0, zirconium 0.1-0.3, hafnium 0.03-0.1, aluminium 0.05-0.2, yttrium 0.005-0.02, nitrogen 0.01-0.03, boron 0.001-0.005, calcium 0.001-0.005, sulphur 0.005-0.01, phosphorus 0.005-0.015, iron - the rest. Summary contents of carbon and nitrogen (C+N) does not exceed 0.015 %, summary contents of sulphur and phosphorus (S+P) does not exceed 0.02 %, while ratio is (Y+Ca)/(S+P)=0.5-1.5. Alloy possesses high resistance of high temperature deformation under condition of continuous effect of operation loads.

EFFECT: increased operability and operation reliability.

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