When exposed for prolonged periods at intermediate temperatures, HAYNES 25 alloy exhibits a loss of
room temperature ductility in much the same fashion as some other solid-solution-strengthened superalloys,such as HASTELLOY® X alloy or alloy 625. This behavior occurs as a consequence of the
precipitation of deleterious phases. In the case of a 25 alloy, the phase in question is CO2W laves
phase. HAYNES 188 alloy is significantly better in this regard than 25 alloy; however, for applications
where thermal stability is important, 230® alloy is an even better selection.
*Composite of multiple sheet lot tests