| 简介 |
PROBLEM TO BE SOLVED : To provide a rare earth metal non-added ferritic stainless steel which has scale peeling resistance and electric conductivity equal to those of a rare earth metal-added steel, and optimum as the current collecting part of a solid oxide type fuel cell.
SOLUTION : The rare earth metal non-added ferritic stainless steel having excellent oxidation resistance has a composition comprising, by mass, ≤0.03% C, ≤1.5% (more preferably <0.5%) Si, 0.4 to 1.5% (more preferably <1.1%) Mn, 0.0008 to 0.0050% S, 18 to 24% Cr, ≤2% Ni, 0.1 to 1.5% Cu, ≤0.03% N, ≤0.05% Sn, and ≤0.10% Al, and in which the content of Nb is regulated so as to satisfy 2≤Mn/Nb≤3, and the balance Fe with inevitable impurities, and, if required, comprising 0.1 to 4.0% Mo, 0.1 to 4.0% W, <0.10% Ti, ≤0.10% Zr, 0.05 to 0.50% V, 0.05 to 0.50% Ta, <3% Co, 0.0005 to 0.02% Ca and 0.0002 to 0.01% B.
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