Patent ID: 10449637

Abstract:
Provided is a flux-cored wire with excellent welding workability, AW performance, and SR performance that can use both 100% CO2 gas and Ar—CO2 mixed gas as the shield gas in an initial layer welding for a structure body, particularly, a pipeline. The flux-cored wire with a flux filled into a steel outer sheath, includes, relative to the total mass of the wire: Mn: 1.5 to 3.1% by mass; Ni: 0.2% or more by mass and less than 1.00% by mass; at least one kind of Si, a Si alloy, and a Si oxide: 0.3 to 1.0% by mass in terms of Si; Ti: 0.05 to 0.29% by mass; C: 0.06 to 0.30% by mass; at least one kind of B, a B alloy, and a B oxide: 0.0030 to 0.0090% by mass in terms of B; and Fe: 91 to 97% by mass.