Duplex stainless steel welded joint

A duplex stainless steel welded joint, comprising:

• a base metal consisting of, in mass %,
• C:
• 0.001% to 0.030%,
• Si:
• 0.05% to 0.80%,
• Mn:
• 0.05% to 1.20%,
• P:
• 0.030% or less,
• S:
• 0.0030% or less,
• Cr:
• 21.00% to 28.00%,
• Ni:
• 4.00% to 8.00%,
• Mo:
• 2.00% to 4.50%,
• Cu:
• 0.01 to 4.00%,
• sol. Al:
• 0.0010 to 0.0500%,
• N:
• 0.080% to 0.400%,
• B:
• 0.0001 to 0.0100%,
• W:
• 0 to 4.00%,
• Nb:
• 0 to 0.10%,
• V:
• 0 to 0.20%,
• Ta:
• 0 to 0.30%,
• Co:
• 0 to 1.00%,
• Sn:
• 0 to 0.020%,
• Mg:
• 0 to 0.0200%, and
• Ca:
• 0 to 0.0100%,
• with the balance being Fe and impurities;
• and
• a weld metal consisting of, in mass %,
• C:
• 0.001% to 0.030%,
• Si:
• 0.05% to 0.70%,
• Mn:
• 0.05% to 0.85%,
• P:
• 0.030% or less,
• S:
• 0.0030% or less,
• Cr:
• 21.00% to 28.00%,
• Ni:
• 5.00% to 11.00%,
• Mo:
• 2.00% to 4.50%,
• Cu:
• 0.01 to 4.00%,
• sol. Al:
• 0.0010 to 0.0500%,
• N:
• 0.080% to 0.400%,
• B:
• 0.0001 to 0.0100%,
• W:
• 0 to 4.00%,
• Nb:
• 0 to 0.10%,
• V:
• 0 to 0.20%,
• Ta:
• 0 to 0.30%,
• Co:
• 0 to 1.00%,
• Sn:
• 0 to 0.020%,
• Mg:
• 0 to 0.0200%, and
• Ca:
• 0 to 0.0100%,
• with the balance being Fe and impurities;
• wherein:
• a content of each element in the base metal and the weld metal is satisfied, and Formula (1) and Formula (2) are satisfied:
• Si+3Mn≤3.00 (1)
• 0<BH/BW<0.15 (2)
• where, a content of a corresponding element in the weld metal is substituted in percent by mass for each symbol of an element in Formula (1), and
• where, in Formula (2), a cap height (mm) of the weld metal is substituted for BH, and a cap width (mm) of the weld metal is substituted for BW.