ECCC Rupture Data for Austenitic Stainless Steels - Experiences Gained with Demanding Data Analyses

摘要

The European Creep Collaborative Committee Working Group on Austenitic stainless steels (WG3B) has performed; (i) reviews of existing rupture strength values, (ii) data collations for existing and new grades of austenitic steels and (iii) new assessments of rupture strength for existing and new grades of austenitic steels. In particular, new creep rupture data assessments have been performed for TP316L, TP316, Alloy 800H, Alloy 800HT, 253MA, Esshete 1250, HR3C, NF709 and NF709R. A variety of different data analyses methods were applied by different assessors. Interestingly, most of these assessments encountered similar problems when attempting to simultaneously fit; high-stress, low-temperature data and low-stress, high-temperature data. These problems are similar to those encountered by others when assessing modified 9Cr and 12Cr alloys. This paper summarises WG3B's experience with such demanding datasets and offers a number of possible solutions to these difficulties.