Nickel-containing steel welding joint used at low temperature

A low-temperature nickel-containing steel welded joint having a base material part having a chemical composition comprising prescribed chemical components, a weld heat-affected zone, and a weld metal, the base material part having an average value of the equivalent circle diameter of the original austenite of 3.0-20.0 [mu] m inclusive, a yield stress at 20 DEG C of 460-710 MPa inclusive, and an average value of the equivalent circle diameter of the original austenite of 3.0-20.0 [mu] m inclusive. The chemical composition of the weld metal is composed of predetermined chemical components, and the proportion of a body-centered cubic structure in the structure of the weld metal is 10% or less. 一种低温用含镍钢焊接接头，具有母材部、焊接热影响区和焊缝金属，所述母材部的化学组成由规定的化学成分构成，所述母材部的原始奥氏体的等效圆直径的平均值为3.0μm以上且20.0μm以下，所述母材部的在20℃下的屈服应力为460MPa以上且710MPa以下，所述焊缝金属的化学组成由规定的化学成分构成，所述焊缝金属的组织中的体心立方结构的比例为10％以下。