P91 Gamma Plugs

P91 is a chrome moly alloy metal that contains excellent strength and temperature resistance for gamma/X-ray/radiographic plugs. It is designed for enhanced creep strength, making it a creep strength enhanced ferritic (CSEF). This metal is made by normalizing at 1050 °C, air cooling to 200 °C, and then tempered through heating to 760 °C.