For thicker sections like butt and tee joints, what is fed into the weld pool?

For thicker sections like butt and tee joints, what is fed into the weld pool?

• A. Filler rod or wire
• B. Tungsten electrode
• C. Shielding gas
• D. Preheating flux

Answer: (A)

The key idea is metal addition to build up the joint. For thicker sections like butt and tee joints, you need extra material to fill the joint and reach the required weld size and strength. That material is filler rod or filler wire, which is fed into the molten weld pool and becomes part of the weld metal. The tungsten electrode is used in processes like TIG but isn’t consumed into the weld pool, shielding gas protects the molten metal without becoming metal itself, and flux serves other roles such as deoxidizing or guiding slag rather than supplying the filler metal. So, filler rod or wire is the material actually fed into the weld pool to achieve the desired join.

The key idea is metal addition to build up the joint. For thicker sections like butt and tee joints, you need extra material to fill the joint and reach the required weld size and strength. That material is filler rod or filler wire, which is fed into the molten weld pool and becomes part of the weld metal. The tungsten electrode is used in processes like TIG but isn’t consumed into the weld pool, shielding gas protects the molten metal without becoming metal itself, and flux serves other roles such as deoxidizing or guiding slag rather than supplying the filler metal. So, filler rod or wire is the material actually fed into the weld pool to achieve the desired join.