A procedure qualified for a two-layer overlay cannot automatically be used for a single-layer application, as single layers suffer from higher base-metal dilution.
The type, trade name, and classification of the filler metal.
It applies to all welding processes suitable for overlay welding, including manual, semi-automatic, and automatic processes.
: Ensures the dilution with the parent metal does not compromise the overlay's performance.
: Elias pulled up the encrypted PDF of ISO 15614-7 . He didn't just need to weld; he needed a qualified procedure . Section 7.4 was flashing red on his HUD—the "Extent of Qualification." If he used the wrong filler metal or shifted the welding position outside the qualified range, the thermal stress would crack the new layer instantly.
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