AUSTENITE SYSTEM ALLOY PIPE AND MANUFACTURING METHOD THEREOF

摘要

There is provided an austenitic alloy pipe that is durable even if a stress distribution different according to usage environment is applied. The austenitic alloy pipe in accordance with the present invention has a tensile yield strength YS LT of at least 689.1 MPa. The tensile yield strength YS LT , a compressive yield strength YS LC in a pipe axial direction, a tensile yield strength YS CT in a pipe circumferential direction of the alloy pipe, and a compressive yield strength YS CC in the pipe circumferential direction satisfy Formulas (1) to (4). 0.90 ‰¤ YS LC / YS LT ‰¤ 1.11 0.90 ‰¤ YS CC / YS CT ‰¤ 1.11 0.90 ‰¤ YS CC / YS LT ‰¤ 1.11 0.90 ‰¤ YS CT / YS LT ‰¤ 1.11