Duplex stainless clad steel plate and method for manufacturing the same

摘要

Provided is a duplex stainless clad steel sheet which is excellent in both the corrosion resistance of a laminated material and the strength and toughness of a base material. The present disclosure is a duplex stainless clad steel sheet in which a duplex stainless steel sheet as a joining material is joined to one surface or both surfaces of a base steel sheet, wherein the base steel sheet has Nb / N of 3.0 or more, and The Ceq represented by the following formula (1) has a predetermined component composition of 0.35 to 0.45, and the duplex stainless steel sheet has a PI defined by the following formula (2) of 33.0 to 38. .0 and a structure containing a ferrite phase in an area fraction of 35 to 65%, the amount of precipitated Cr in the structure is 1.00% or less, and the amount of precipitated Mo is 0. It is 50% or less. Formula (1): Ceq = C + Mn / 6 + (Cu + Ni) / 15 + (Cr + Mo + V) / 5, Formula (2): PI = Cr + 3.3Mo + 16N