| 摘要 |
PROBLEM TO BE SOLVED: To produce a steel for an inexpensive separator of solid electrolytic fuel cell in which an oxidized film having good electric conductivity at about 1000 deg.C and furthermore having good oxidation resistance and small in a difference in thermal expansion from an electrolyte. SOLUTION: This steel has a compsn. contg., by weight, <=0.2% C, 0.2 to 3.0% Si, 0.2 to 1.0% Mn, 15 to 30% Cr and one or >= two kinds among <=0.5% Y, <=0.2% rare earth elements and <=1% Zr, and the balance Fe with inevitable impurities. If required, the steel may be incorporated with <=2% Ni, <=1% Al, <=1% Ti, one or >= two kinds of Mo and W by <=5% Mo+1/2W and <=2% Nb individually or in combination in each range. |
