AUSTENITE CORROSION-RESISTANT CHROME-NICKEL STEEL WITH IMPROVED MACHINABILITY Russian patent published in 2016 - IPC C22C38/58 C22C38/50 C22C38/40 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, namely to austenitic corrosion-resistant steels used in commercial production of parts operating to 600 °C. Steel contains, wt%: carbon not more than 0.12, silicon 0.20-0.80, manganese 0.20-2.00, chromium 17.00-19.00, nickel 9.00-11.00, bismuth 0.06-0.13, calcium 0.002-0.003, aluminium 0.02-0.03, sulphur not more than 0.020, phosphorus not more than 0.035, molybdenum not more than 0.30, copper not more than 0.20, titanium not more than 0.50, vanadium not more than 0.20, tungsten not more than 0.20, iron is rest.

EFFECT: better machinability at maintaining required mechanical properties, weldability and corrosion resistance of metal, as well as improving environmental situation production due to reduced aggressiveness of hazardous emissions into ambient atmosphere.

1 cl, 2 tbl