Patent ID: 8137613

Claim:
An austenitic Fe—Ni—Cr alloy welded joint, whose base metal and weld metal each comprises, by mass percent, C: not more than 0.3%, Si: not more than 2%, Mn: 0.01 to 3.0%, P: more than 0.04% to not more than 0.3%, S: not more than 0.03%, Cr: 12 to 30%, Ni: 6 to 55%, rare earth metal(s): 0.51 to 0.6%, sol. Al: 0.001 to 3% and N: not more than 0.3%, with the balance being Fe and impurities, and the following formula (1) is satisfied: (Cr+1.5×Si+2×P)/(Ni+0.31×Mn+22×C+14.2×N+5×P)<1.388 (1), wherein each element symbol in the formula (1) represents the content by mass percent of the element concerned.