HEAT-RESISTANT ALLOY Russian patent published in 2017 - IPC C22C19/05 C22C30/00 

FIELD: metallurgy.

SUBSTANCE: invention can be used in the manufacture of pipes, sheets, forgings and other equipment operating in corrosive environment, as well as for vessels and apparatuses operating at high pressure within temperature range from minus 196°C to plus 790°C and pressure up to 50 atm. The heat-resistant alloy contains wt %: carbon ≤0.06; chromium 17.5÷22.5; cobalt ≤0.85; silicon ≤0.45; manganese 2.45÷3.51; niobium 1.9÷3.1; titanium ≤0.70; copper ≤0.30; yttrium >0÷0.001; oxygen >0.0005÷0.018; hydrogen >0.0005÷0.0017; nitrogen >0.0005÷0.050; sulfur ≤0.015; phosphorus ≤0.015; lead ≤0.009; tin ≤0.009; arsenic ≤0.009; zinc ≤0.009; antimony ≤0.009; iron ≤3.0; nickel is the rest.

EFFECT: increased structural stability of the alloy during aging, reduced susceptibility of the alloy to formation of hot cracks during welding.

2 cl