Patent ID: 6953636

Claim:
A press separator for a fuel cell made of an austenitic stainless steel comprising B: 0.005 to 1.5 wt. %, C: 0.15 wt. % or less, Si: 0.01 to 1.5 wt. %, Mn: 0.01 to 2.5 wt. %, P: 0.035 wt. % or less, S: 0.01 wt. % or less, Al: 0.001 to 0.2 wt. %, N: 0.3 wt. % or less, Cu: 0 to 3 wt. %, Ni: 7 to 50 wt. %, Cr: 17 to 30 wt. %, Mo: 0 to 7 wt. %, and balance being Fe and inevitable impurities, with contents of Cr, Mo, and B satisfying the following formula: Cr (wt. %)+3×Mo (wt. %)−2.5×B (wt. %)≧17, precipitating at least one of M 23 (C, B) 6 boron carbide, M 2 B borides on the surface, and being press formed in continuous corrugations, wherein M means metal, the continuous corrugations consisting of bent portions are formed by folding or elongating in press forming, acute angle of the bent portion with respect to the direction in which the corrugations continue is 15 degrees or more, and outer bending radius R defined by an outer profile of the bent portion is 0.2 to 1 mm.