Comparison of cracking in recovery boiler composite floor and primary air port tubes

Cracking of the stainless steel outer layer of co-extruded 304L stainless steel/SA210 Gd A1 carbon steel tubes in kraft recovery boilers has been the subject of intensive worldwide investigation for more than a decade. One such multi-task project, funded by the U.S. Department of Energy (DOE) and launched in 1994, focused initially on cracking in co-extruded floor tubes. Results of this study led to recommendations on selection of alternate …