| 摘要 |
Provided is a welding metal in which a predetermined chemical component composition is satisfied, the A value as specified by formula (1) is 3.8% to 9.0%, and the surface area percentage of carbide having a circle-equivalent diameter of 0.20 µm or greater in the welding metal is 4.0% or less. A value = 0.8 × C - 0.05 × Si + 0.5 × Mn + 0.5 × Cu + Ni - 0.5 × Mo + 0.2 × Cr (Provided that [C], [Si], [Mn], [Cu], [Ni], [Mo] and [Cr] are the C, Si, Mn, Cu, Ni, Mo and Cr content (by mass percent), respectively) The welding metal is useful as a material for a pressure vessel of a nuclear power plant as the welding metal is high in strength and has good low-temperature toughness and drop-weight characteristics. |
