Hi,

Does a ASTM A487 Gr CA6NM Cl B material requirement require as POST WELD HEAT TREATMENT operation after completing any kind of welding (ex. Stellite Gr. 6 hard facing / 2 parts of same CA6NM material been butt welded)

ASME Sec VIII Div I, doesnt say any PWHt requirement for P. No 6 & Grp no. 4  (CA6NM group)

But in ASTM,  there is a PWHT requirement for A487 Gr. CA6NM Cl B material.

Please give your feedback / suggestions.