Impact of Availability and Economics on Alloy Selection, 2014 PEERS Conference

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Cost, availability, and performance are all driving factors in material selection.1 Duplex stainless steels have long been of interest to the pulp and paper industry and biomass conversion due to lean alloying and good corrosion resistance. Product form availability and lead times can influence alloy selection. This paper reviews factors that should be considered when selecting a duplex stainless steel in today’s market. As nickel prices rise and fall the relative cost savings may be large and/or insignificant depending on surcharges at the time material is ordered. Other factors, such as availability can also be a hindrance. Lean duplex stainless steels have been successful in replacing 300 series austenitic stainless in storage tanks where the only product forms used are plate and weld wire. In systems where multiple product forms are required, a combination of duplex alloys may be necessary to optimize the configuration.