Patent ID: 7014720
Filing Date: 2006-03-21
Classification: C21D,C22C

Abstract:
1. An austenitic stainless steel tube excellent in steam oxidation resistance, characterized by consisting of, by mass %, C: 0.03–0.12%, Si: 0.1–0.9%, Mn: 0.1–2%, Cr: 15–22%, Ni: 8–15%, Ti: 0.002–0.05%, Nb: 0.3–1.5%, sol.Al: 0.0005–0.03%, N: 0.005–0.2% and O (oxygen): 0.001–0.008%, and the balance Fe and impurities, and also characterized by an entire structure having a uniform fine-grained structure wherein austenitic grain size is ASTM No. 7 or more.