Process qualification

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1. Can the welding procedure qualification for S30408 and S31603 be applied interchangeably? The filler metal compositions of the two vary, but in NB47014, the contents of important alloying elements in the submerged arc welding weld metal as specified in 6.1.3.1b) fall outside the acceptable range, requiring a new process evaluation to be conducted ； In the welding procedure qualification table for NB47014, under filler metal category 10), there is a qualification factor for cases where the composition of the weld metal changes without conducting manual welding. I’m stuck; I hope an expert can clarify my doubts. 2. Is an impact test required for the process evaluation of welding austenitic stainless steel and carbon steel? If it needs to be done, does one only need to treat the heat-affected zone of the carbon steel side? Neither the stainless steel sheets nor the weld metal of stainless steel requires impact testing, as there are no specific requirements specified in the drawings.