Welder Application

Dear Experts
A welder is qualified to welding carbon steel, then that welder may be weld onto stainless steel ?

In my opinion, we focus to essential denote such change, deletion, addition, …

ASME IX 2019 - Table QW-353 - SMAW process - QW-404.15 - change F-Number., other essentials are unchanged.

  • Welder qualified on carbon steel using electrode F4 (eg. E7016) can not cover for stainless steel electrode F5 (E316) and vice versa.

ASME IX 2019 - Table QW-356 - GTAW process - QW-408.8 Deleted backing gas, other essentials are unchanged.

  • Welder qualified on carbon steel using electrode F6 (ER70S-6) may cover for stainless steel ER316 by additional backing gas.
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