Submerged arc welded joint

A submerged arc welded joint, the joint comprising a weld metal which is formed by using a welding wire and a flux in combination and by performing submerged arc welding with a welding heat input of 300 kJ/cm or more, wherein:

• the weld metal has a chemical composition, comprising, by mass %:
• C:
• 0.05% to 0.15%,
• Si:
• 0.2% to 0.9%,
• Mn:
• 0.5% to 1.3%,
• P:
• 0.015% or less,
• S:
• 0.015% or less,
• Cr:
• 0.10% to 0.45%,
• Mo:
• 0.5% to 2.0%,
• Ni:
• 2.5% to 6.0%,
• O:
• 0.040% or less,
• N:
• 0.012% or less, and
• a balance of Fe and incidental impurities,
• as measured by a tensile test is-performed on the weld metal, a yield strength of the weld metal is 630 MPa or higher and a tensile strength of the weld metal is 780 MPa or higher, and
• an absorbed energy vE0 of the weld metal, as measured by a V-notch Charpy impact test performed at a testing temperature of 0° C., is 47 J more,
• Ceg, which is expressed by equation (1) below, is in a range of 0.65 to 1.00:
• Ceq=[C]+0.17[Mn]+0.04[Si]+0.025[Ni]+0.2[Cr]+0.25[Mo] (1),
• and
• α, which is expressed by equation (2) below, is 6.0 or less:
• α=30[C]+0.7[Mn]+[Ni]−([Si]+0.5[Cr]+1.5[Mo]) (2),
• where, in the equation (1) and the equation (2), the expression “[element symbol]” denotes a content (mass %) of the corresponding element in the weld metal described above.