| 摘要 |
[Problems] To provide a low-hydrogen coated electrode excellent in the electrode burning resistance and the coatability and capable of giving a weld metal with an excellent defect resistance. [Means for Solving the Problems] A low-hydrogen coated electrode includes a core wire and a covering material, in which either one or both of the core wire and the covering material contain, as alloy components, C, Si, Mn, Cr, Mo, and Fe, each in a predetermined amount, per total mass of the low-hydrogen coated electrode, the covering material contains, as flux components, Ca carbonate, a metal fluoride and SiO 2 , each in a predetermined amount, per total mass of the low-hydrogen coated electrode, the covering material contains substantially no carbonate except for the Ca carbonate, and the low-hydrogen coated electrode satisfies either one or both of a requirement that when a diameter of the low-hydrogen coated electrode is defined as a coating diameter and a diameter of the core wire is defined as a core wire diameter, a ratio of coating diameter to core wire diameter is from 1.50 to 1.80 and a requirement that the covering material has a density of from 0.200 to 0.260 g/cm 3 . |
