| 摘要 |
PROBLEM TO BE SOLVED: To provide an austenitic stainless steel excellent in scale peeling resistance in an environment of a hydrogen generator. SOLUTION: This steel is the one having a compsn. contg., by weight, 0.01 to 0.15% C, 0.5 to 5% Si, 0.2 to 2% Mn, <=0.04% P, <=0.02% S, 12 to 22% Ni, 17 to 26% Cr, 0.01 to 5% Al and 0.02 to 0.4% N, and the balance Fe with inevitable impurities, and in which the relation among the amounts of the elements to be added, the maximum heating temp. T(K) in use and the temp. gradientα( deg.C/mm) satisfies the inequality of 2.1(Cr-17)+3.5(Ni-12)+6.8(Si-0.5)+3.9Al}/ 0.012+α}>=1.
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