Which FCAW category uses external shielding gas?

Which FCAW category uses external shielding gas?

• A. FCAW-S
• B. FCAW-G
• C. Both FCAW-G and FCAW-S
• D. Neither uses shielding gas

Answer: (B)

In flux-cored arc welding, protection of the weld pool comes from different shielding methods. The form that uses external shielding gas is the gas-shielded type, where shielding gas from a cylinder surrounds the arc to guard the weld against air contamination. This external gas protection helps improve weld quality, bead shape, and penetration, especially in outdoor or windy conditions where gas could be blown away. The self-shielded form, on the other hand, relies on flux in the electrode to produce its own shielding gases and slag, so no external gas is required. Therefore, the category that uses shielding gas from an outside source is the gas-shielded type.

In flux-cored arc welding, protection of the weld pool comes from different shielding methods. The form that uses external shielding gas is the gas-shielded type, where shielding gas from a cylinder surrounds the arc to guard the weld against air contamination. This external gas protection helps improve weld quality, bead shape, and penetration, especially in outdoor or windy conditions where gas could be blown away. The self-shielded form, on the other hand, relies on flux in the electrode to produce its own shielding gases and slag, so no external gas is required. Therefore, the category that uses shielding gas from an outside source is the gas-shielded type.