AUSTENITE STAINLESS STEEL AND METHOD OF PRODUCING MATERIAL OUT OF AUSTENITE STAINLESS STEEL Russian patent published in 2017 - IPC C22C38/58 

FIELD: metallurgy.

SUBSTANCE: steel contains, wt %: C: not more than 0.050, Si: 0.01-1.00, Mn: 1.75-2.50, P: not more than 0.050, S: not more than 0.010, Ni: 20.00-24.00, Cr: 23.00-27.00, Mo: 1.80-3.20, N: 0.110-0.180, the rest - Fe and unavoidable impurities. Steel grain size number determined according to JIS G0551 (2005) is at least 6.0, part of area occupied by phase σ does not exceed 0.1%, fluidity point at 230°C is at least 220 MPa, and a corrosion rate in the corrosion test to 65% nitric acid according to JIS G0573 (1999) does not exceed 0.085 g/m²/H.

EFFECT: steel has high temperature strength and corrosion resistance in nitric acid.

2 cl, 2 dwg, 1 tbl, 1 ex