| 摘要 |
PURPOSE:To offer a material excellent in high temp. oxidation resistance and high temp. strength and used for high temp. use such as automotive exhaust gas-purifying apparatus, heaters and electric heating materials. CONSTITUTION:This high Al-contg. ferritic stainless steel contains, by weight, <=0.03% C, <=1% Si, <=1% Mn, <=0.04% P, <=0.003% S, 15 to 25% Cr, <=0.03% N, 3 to 6% Al, 0.1 to 4% Mo and total 0.01 to 0.15% of one or >= two kinds among rare earth elements or Y. Furthermore, as optional components, total 0.05 to 1% of one or >= two kinds among Nb, V and Ti may be incorporated therein. Thus, by incorporating prescribed Mo therein, the steel free from abnormal oxidation over a long time even under severe oxidation conditions and excellent in high temp. strength can be manufactured without increasing the amounts of Al, rare earth elements, Y or the like.
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