At temperatures over 300 degrees, for pumps made of material A-8, what is a suitable material for the pump shaft?
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At high temperatures, the power that a 316 pump shaft can transmit is only about half of that at normal temperatures. What other materials can be used as substitutes?
Duplex steel 2205 should work
Duplex steel cannot be used above 260°C. There is a brittle failure at 475°C, and this brittle failure begins to occur around 300 degrees
Indeed, duplex steel is best used below 300°C. Our projects have also used XM-19 and 17-4PH pump shafts; 17-4PH has slightly poorer corrosion resistance, equivalent to 304.