2415 Study on long-term high temperature strength of high Cr steel welds : Part 4: Size Effect and Loading-Dependency

It is important to grasp the dependency of strength on the size of specimen as well as characteristics of loading in developing assessment methods for high-chromium steel weldment under the presence of type-IV damage. Size effect was evaluated by testing flat plate specimens of modified 9Cr-1Mo steel with different thickness and comparing their lives with those of small round-bar specimens. Hollow cylinder specimens were also tested under inner...