Ni based high-Cr alloy welding wire, shielded metal arc welding rods and shielded metal arc welding metal

Provided is a high Cr Ni-based alloy welding wire with which tensile strength and weld cracking resistance of a welded portion, the integrity of the microstructure of a welded metal, and inhibition of scale generation are improved. The high Cr Ni-based alloy welding wire is configured to have an alloy composition comprising, by mass, C: 0.04% or less, Mn: 7% or less, Fe: 1 to 12%, Si: 0.75% or less, Al: 0.01 to 0.7%, Ti: 0.01 to 0.7%, Cr: 25.0 to 31.5%, Ta: 1 to 10%, Mo: 1 to 6%, and N: 0.1% or less, and as inevitable impurities, Ca + Mg: less than 0.002%, P: 0.02% or less, O: 0.01% or less, S: 0.0015% or less, H: 0.0015% or less, Cu: 0.08% or less, and Co: 0.05% or less, and the balance: Ni. Then, the high Cr Ni-based alloy welding wire is configured such that the contents of S, Ta, Al, and Ti satisfy the following relation (1) and the contents of Ta, Mo, and N satisfy the following relation (2) : 12000 �¢ S + 0.58 �¢ Ta - 2.6 �¢ Al - 2 �¢ Ti ‰¤ 19.3 Ta + 1.6 �¢ Mo + 187 �¢ N ‰¥ 5.7