AUSTENITE ALLOY PIPE AND METHOD OF ITS MANUFACTURING Russian patent published in 2015 - IPC C21D8/10 C21D9/08 C22C38/00 C21D6/00 

FIELD: metallurgy.

SUBSTANCE: invention refers to metallurgy, particularly to oil-field schedule pipes. To ensure low anisotropy of yield strength of the pipe upon various stresses application to it depending on the application the austenite alloy pipe is produced with tension yield strength YS_LT at least 689.1 MPa. Tension yield strength during tension YS_LT and compression yield strength YS_LC in pipe axial direction, tension yield strength YS_CT in pipe peripheral direction, and compression yield strength YS_CC in pipe peripheral direction comply with equations (1)-(4): 0.90≤YS_LC/YS_LT≤1.11 (1), 0.90≤YS_CC/YS_CT≤1.11 (2), 0.90≤YS_CC/YS_LT≤1.11 (3), 0.90≤YS_CT/YS_LT≤1.11 (4).

EFFECT: assurance of low anisotropy of pipe yield strength.

9 cl, 10 dwg, 2 tbl, 1 ex