| abstract |
A contribution metal obtained by arc welding with shielding gas using a flux core wire, including the flux core wire a steel sheath, and a flow charged to the steel sheath, the contribution metal comprising: C: from 0.04 to 0.08% by mass; Yes: from 0.20 to 0.50% by mass; Mn: from 0.80 to 1.70% by mass; Ti: from 0.030 to 0.080% by mass; Ni: from 0.30 to 3.00% by mass; Mo: from 0.01 to 0.20% by mass; B: from 0.0020 to 0.0070% by mass; O: from 0.040 to 0.070% by mass; Al: 0.01% by mass or less; and the rest of Faith and incidental impurities, in which the following equation is satisfied: ([C] X [Mn] X [Ti]) / ([Si] X [O])> = 0.20 to 0 , 60 20 in which [C], [Mn], [Ti], [Si], and [O] represent the contents of C, Mn, Ti, Si, and O, respectively, in which the volume ratio of the ferrite side plates in a column structure is 20% by mass or less. |