What should be listed for the flux in a WPS form?

• A. Type of granular flux needs to be identified as it will influence the properties of the finished weld, and is used for processes such as SAW, electroslag and electrogas.
• B. The flux color determines weld strength.
• C. The flux should be listed only for TIG welding.
• D. Flux is not used in welding.

Answer: (A)

The important point is that flux is an active part of several welding processes, not just a filler. In processes like submerged arc welding, electroslag welding, and electrogas welding, the granular flux directly influences the weld chemistry, slag formation, deoxidation, hydrogen content, and even the amount of alloying elements that enter the weld metal. Because these factors determine the final mechanical properties, toughness, and defect susceptibility, the WPS must specify exactly which flux type (and often grade or composition) will be used. This ensures the procedure is reproducible and compatible with the base metal and filler metal.

Color or appearance of the flux does not determine weld strength, and flux is indeed used in several welding methods beyond TIG. Saying flux isn’t used would be inaccurate for these processes.