When using a semi automatic welding process such as FCAW or GMAW, is a welder qualified to use electrodes and a shielding medium other than that used for the test?

• A. Yes, with Supervisor Approval
• B. No
• C. Only for Approved Materials
• D. Only for Another Process

Answer: (B)

Welder qualification is tied to the exact variables used in the test, including the process, the electrode type, and the shielding medium. Changing the electrode or shielding gas from what was used during the qualification alters the arc behavior, heat input, and the metallurgy of the weld. Without requalification under these new variables, the welder is not considered qualified to weld with them. If a different electrode or shielding gas is needed, a new test or requalification with those variables is required. Supervisor approval does not substitute for this requirement, and switching materials or a different process would similarly require requalification because it changes the essential conditions of the qualification.