Grade EN 1.4404 (ASTM 316L) stainless steel was selected. The project consultant of TMR Consulting explains that this was because, first, the memorial will be subjected to deicing salts from the adjacent highways and, second, the roughness of the surface finish. A rough finish will retain more salt, dust and pollutants, necessitating a higher level of corrosion resistance. Furthermore, because the spires must look seamless and the welds are also structurally critical, it was important to use a grade that allows for easy welding and handling.
Experts from New Castle, Indiana
Outokumpu was selected as the stainless plate supplier for reasons of both technical competence and level of service. First, Outokumpu’s New Castle plate mill could provide the necessary high flatness over the desired width and length, coupled with a low sulfur content. Second, Outokumpu spent two years providing technical assistance to the designers, including samples and answering questions about flatness.
“Outokumpu was the only plate supplier that was able to meet the technical requirements and willing to provide a high level of technical assistance to the designers,” a TMR Consulting representative says.