What would be the best choice for weld filler metal with the following joint description: 2-1/8" x 0.150" MWT SA213-TP347H to SA213-TP310HCbN (HR3C) with a SA213-TP347H backing ring. The joint will be in service in a coal fired boiler, and could see temperatures as much as 1200 deg F. We have narrowed the choices to either using a ER347 filler, or a ERNiCr-3 (Inconel 82) filler.
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Best Choice of Weld Filler Metal??
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