Austenitic stainless steel weld joint

An austenitic stainless steel weld joint comprising a base material and a weld metal, wherein

• a chemical composition of the base material consists of, in mass %:
• C:
• 0.030% or less;
• Si:
• 0.10 to 1.00%;
• Mn:
• 0.20 to 2.00%;
• P:
• 0.040% or less;
• S:
• 0.010% or less;
• Cr:
• 16.0 to 25.0%;
• Ni:
• 10.0 to 30.0%;
• Mo:
• 0.10 to 0.90%;
• Nb:
• 0.31 to 1.00%;
• N:
• 0.050 to 0.300%;
• sol.Al:
• 0.001 to 0.100%;
• B:
• 0.0010 to 0.0080%;
• Cu:
• 0 to 5.00%;
• W:
• 0 to 5.0%;
• Co:
• 0 to 1.0%;
• V:
• 0 to 1.00%;
• Ta:
• 0 to 0.20%;
• Hf:
• 0 to 0.20%;
• Ca:
• 0 to 0.010%;
• Mg:
• 0 to 0.010%;
• and
• rare earth metals:
• 0 to 0.100%,
• with the balance being Fe and impurities, and
• satisfying Formula (1), and
• in the weld metal, at a width-center position and at a thickness-center position, a chemical composition of the weld metal consists of, in mass %:
• C:
• 0.050% or less;
• Si:
• 0.01 to 1.00%;
• Mn:
• 0.01 to 3.00%;
• P:
• 0.030% or less;
• S:
• 0.015% or less;
• Cr:
• 15.0 to 25.0%;
• Ni:
• 20.0 to 70.0%;
• Mo:
• 1.30 to 10.00%;
• Nb:
• 0.05 to 3.00%;
• N:
• 0.150% or less;
• B:
• 0.0050% or less;
• sol.Al:
• 0 to 1.000%;
• Cu:
• 0 to 2.50%;
• W:
• 0 to 1.0%;
• Co:
• 0 to 15.0%;
• V:
• 0 to 0.10%;
• Ti:
• 0 to 0.50%;
• Ta:
• 0 to 0.20%;
• Ca:
• 0 to 0.010%;
• Mg:
• 0 to 0.010%;
• and
• rare earth metals:
• 0 to 0.100%,
• with the balance being Fe and impurities:
• B+0.004−0.9C+0.017Mo2≥0 (1)
• where symbols of elements in Formula (1) are to be substituted by contents of corresponding elements (in mass %).