Y-Y Ma et aL/ Engineering Failure Analysis 47(2015)162-177 167 Fig 4. Metallographic structures of the DSS:(a)flange(b) cylindrical body and(c) butt weld. austenite in the weld joint is only about 23.0%, far below the standard of qualified 2205 DSS, indicating an unbalanced aus- tenite/ferrite ratio in the weld joint. By means of determined metallographically point count method, the same conclusion was drew out that the amount of austenite in the weld joint is less than 25% By the same method the amount of the aus- tenite in the cylindrical body and flange are nearly 48. 13% and 49.38% respectively both of which are in accordance with the tandard of 2 205 dssaustenite in the weld joint is only about 23.0%, far below the standard of qualified 2205 DSS, indicating an unbalanced aus￾tenite/ferrite ratio in the weld joint. By means of determined metallographically point count method, the same conclusion was drew out that the amount of austenite in the weld joint is less than 25%. By the same method, the amount of the aus￾tenite in the cylindrical body and flange are nearly 48.13% and 49.38% respectively, both of which are in accordance with the standard of 2205 DSS. Fig. 4. Metallographic structures of the DSS: (a) flange (b) cylindrical body and (c) butt weld. Y.-Y. Ma et al. / Engineering Failure Analysis 47 (2015) 162–177 167