When was FCAW developed?

• A. In the 1920s
• B. In the 1990s
• C. In the 1970s
• D. In the 1950s

Answer: (D)

Flux-cored arc welding was developed in the 1950s, when flux-filled tubular wires were introduced to protect the weld and add alloying elements from within the wire itself. This design allowed for higher deposition rates and easier shielding in outdoor or windy conditions, especially with the self-shielded variant, while later improvements added versatile gas-shielded options. The 1950s mark the starting point of FCAW, with rapid refinements in the following decades. Earlier dates don’t fit because the flux-cored concept didn’t exist in the 1920s, and the later 1970s or 1990s reflect maturation and expansion rather than the initial development.