AUSTENITIC CORROSION-RESISTANT STEEL WITH NITROGEN Russian patent published in 2020 - IPC C22C38/58 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to production of corrosion-resistant austenitic steels used for production of articles operated in strong oxidative and alkaline media. Steel contains carbon, silicon, manganese, chromium, nickel, nitrogen, magnesium or boron, iron and unavoidable impurities, including sulfur, phosphorus, copper, tin, antimony, arsenic, lead and bismuth, in following ratio of components, wt. %: carbon ≤ 0.030, silicon ≤ 0.50, manganese 2.0-4.0, chromium 17.0–21.0, nickel 8.0–10.0, nitrogen 0.25–0.35, magnesium 0.05 or boron 0.005, sulfur ≤ 0.015, phosphorus ≤ 0.015, copper ≤ 0.20, tin ≤ 0.005, antimony ≤ 0.005, arsenic ≤ 0.005, lead ≤ 0.005, bismuth ≤ 0.005, iron – the rest.

EFFECT: providing a stable austenite structure, up to cryogenic temperatures, high strength, as well as high viscosity and resistance to general and intergranular corrosion, including corrosion under stress.

2 cl, 4 dwg, 4 tbl