| abstract |
The present invention provides a welded joint having excellent metal dusting resistance. The welded joint is a welded joint having a weld zone containing Cr: 15.0 to 30.0%, and Ni: a welded joint formed by welding 40.0-70.0% of a welding material having a chemical composition, comprising: a base material having a chemical composition, in mass%, of C: 0.03-0.075%, Si: 0.6-2.0%, Mn: 0.05-2.5%, P: 0.04% or less, S: 0.015% or less, Cr: more than 16.0% and less than 23.0%, Ni: 20.0% or more and less than 30.0%, Cu: 0.5 to 10.0%, Mo: less than 1%, Al: 0.15% or less, N: 0.005-0.20%, O: 0.02% or less, Ca: 0-0.1%, REM: 0-0.15%, V: 0% or more and less than 0.5%, Nb: 0-2%, and the balance: fe and impurities; and a primary layer weld metal having a chemical composition with an Fe content of 10-40% by mass. |