Stress Relief Cracking on the Weld of T/P 23 Steel

T/P 23 weld failures occurred in coal fired supercritical power plants were investigated and possible causes were considered. Susceptibility of stress relief cracking was tested through mechanical properties varying heat treatment conditions in weld and intrinsic stress level in the pipe system was calculated by FEM analysis using displacement data. We also investigated what elements in the filler composition affected stress relief cracking...