Which welding process is self-shielded and does not require external shielding gas?

Which welding process is self-shielded and does not require external shielding gas?

• A. SMAW
• B. FCAW-G
• C. FCAW-S
• D. GMAW

Answer: (C)

Self-shielded welding protects the weld from the atmosphere with shielding material produced by the electrode or flux itself, so no external shielding gas is needed. In flux-cored arc welding, there are two variants: the self-shielded type uses a flux-core wire that generates protective gases and slag as it burns, providing all the shielding inside the process. This means you don’t rely on a gas cylinder or external gas flow to protect the weld. Among the options, the one that fits this description is the self-shielded flux-core arc welding, because the flux in the core supplies the shielding without external gas. The other options either require an external shielding gas or employ a shielding method not described as self-shielded in this context.

Self-shielded welding protects the weld from the atmosphere with shielding material produced by the electrode or flux itself, so no external shielding gas is needed. In flux-cored arc welding, there are two variants: the self-shielded type uses a flux-core wire that generates protective gases and slag as it burns, providing all the shielding inside the process. This means you don’t rely on a gas cylinder or external gas flow to protect the weld. Among the options, the one that fits this description is the self-shielded flux-core arc welding, because the flux in the core supplies the shielding without external gas. The other options either require an external shielding gas or employ a shielding method not described as self-shielded in this context.