Patent ID: 11873542
Assignee: NIPPON STEEL CORPORATION
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 2:
3. A high-Ni alloy having an excellent weld hot cracking resistance, comprising: in mass %, C: 0.15% or less, Si: 0.05 to 2.0%, Mn: 0.05 to 2.0%, P: 0.035% or less, S: 0.0015% or less, Cr: 16 to 30%, Ni: 18 to 50%, Al: 0.01 to 1.0%, Ti: 0.01 to 1.5%, N: 0.35% or less, O: 0.003% or less, Mo: 8% or less, Cu: 4% or less, Co: 3% or less, Ca: 0.0003 to 0.0050%, Mg: 0.0045% or less, and a balance consisting of Fe and impurities, wherein
mass ratios of CaO, MgO, and Al2O3 in inclusions, where O or S is detected, satisfy a formula (2), the mass ratios being respectively calculated from an average Ca concentration, an average Mg concentration, and an average Al concentration in the inclusions,

[CaO−0.6×MgO](mass %)/[CaO+MgO+Al2O3](mass %)≥0.20  (2).