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Are you restricted to process you mentioned? Could you use an oscillating submerged arc system or possibly strip cladding? Those processes with cover the acreage you list.

Yes, ceramic is a retainer. See Section IX, QW/QB-492 for definitions.

Not to be a bother but, is this my answer? Section VIII, UHA-105 then to Appendix A, A-350 and A-360 of Section II part D. In other words, (other than the obvious corrosion resistance loss) embrittlement would be the concern, and that concern becomes a reality around 1100°F?

Thank you stanweld and metengr for your replies. It was the statements from Section IX that made this a grey area for me. 407.1(b) (1)No PWHT (2) PWHT within a specified temperature range. One could believe from this that any additional heating after welding could be thought to be a PWHT, since...

Appreciate any help on this. The question is about some internal bracketry, which is not attached/welded to the pressure boundary. Bracket material is also SA-240 316L, which during operation may see temperature of 600°F - 700°F. Is this temperature to be considered as essential for procedure...

I believe any un-assigned base metal requires qualification under Section IX.

You say the strip feeds very quickly. This problem can also happen with SAW (wire) when the starting feed rate is too fast. If adjustable on youe equipment, turn the "Run In Speed" to a lower speed. A slow run in speed is to help the arc initiate before switching over to actual welding amperage...