CORROSION-RESISTANT STEEL, METHOD OF MAKING SAID STEEL AND USE THEREOF Russian patent published in 2020 - IPC C22C38/52 C21D8/10 

FIELD: metallurgy.

SUBSTANCE: invention relates to corrosion-resistant steel with a limit of at least 758 MPa. Steel contains, wt %: 0.005≤C<0.03; 14≤Cr≤17; 2.3≤Mo≤3.5; 3.2≤Ni≤4.5; Si≤0.6; 0.5≤Cu≤1.5; 0.4≤Mn≤1.3; 0.35≤V≤0.6; 3.2xC≤Nb≤0.1; W≤1.5; 0.5≤Co≤1.5; 0.02≤N≤0.05; Ti≤0.05; P≤0.03; S≤0.005; Al≤0.05; the balance is Fe and unavoidable impurities. Steel has microstructure containing from 5 % to 15 % austenite.

EFFECT: steel has high corrosion resistance and fracture resistance, and is also easily manufactured under conditions of high temperature.

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