Patent ID: 8133632

Claim:
A metal component for a fuel cell configured using austenitic stainless steel for a polymer electrolyte fuel cell, consisting essentially of, in % by weight, Cu: 0.10-6.00%, Ni: 6.00-13.00%, Cr: 16.00-20.00% and N: 0.005-0.30%, and also of C: less than 0.02%, Si: 1.00% or less, Mn: 1.00% or less, P: 0.030% or less and S: 0.005% or less, satisfying a relation of 250×[C %]+5×[Mn %]+25×[P %]+200×[S %]<10, and the balance of Fe and inevitable impurities, wherein said metal component is disposed in contact with a main cell unit comprising a polymer electrolyte film as an electrolyte held between a pair of electrodes, wherein said electrode has a plate form and is in contact with said polymer electrolyte film on a first main surface thereof, and said metal component is a plate-formed metal base disposed in contact with said electrode on a second main surface thereof, having a regular rough on the main surface opposing to said electrode, projected portions of said regular rough being brought into contact with said electrode, and recessed portions of said regular rough serving as a gas flow path through which a fuel gas or an oxidizer gas is supplied to said electrode.