| 摘要 |
A generally Mo-free, ferrite-austenite duplex stainless steel has a ferrite phase area ratio of about 20 to about 60 % and a composition containing, in mass %, not more tha n about 0.08 % of C, about 0. 5 to about 1.5 % of Si, not more than about 1.0 % of Mn, about 4.0 to about 8.0 % of Ni, about 23 to about 27 % of Cr, about 2.0 to about 6.0 % of Cu, about 0.05 to about 0.3 % of N, and the balance being Fe and generally unavoidable impurities.
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