Patent ID: 8440029

Claim:
A stainless steel sheet for use in a fuel cell separator, the stainless steel sheet having a composition of, in terms of % by mass: C: 0.01% or less, Si: 1.0% or less, Mn: 1.0% or less, S: 0.01% or less, P: 0.05% or less, Al: 0.20% or less, N: 0.02% or less, Cr: 20 to 40%, Mo: 4.0% or less, and at least one selected from Nb, Ti, and Zr: 0.05 to 0.60% in total, the balance being Fe and unavoidable impurities, wherein at least one precipitate having an equivalent circle diameter of 0.1 μm or more is present per 100 μm 2 , a ratio of a steel sheet thickness t (μM) to a maximum diameter Dmax (μm) of the precipitates satisfies formula (1) below 20 ≦t/D max (1) and the steel sheet thickness is 200 μm or less.