| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide inexpensive Sn-containing duplex stainless steel, duplex stainless steel slabs, and duplex stainless steel material having good hot productivity. <P>SOLUTION: The duplex stainless steel contains, by mass, 0.03% or less of C, 0.05-1.0% of Si, 0.1-4.0% of Mn, 0.05% or less of P, 0.0001-0.0010% of S, 23.0-28.0% of Cr, 2.0-6.0% of Ni, 0-1.0% of Co, 0.2-3.0% of Cu, 0.01-0.2% of Sn, 0.20-0.30% of N, 0.05% or less of Al, and 0.0010-0.0040% of Ca, wherein Ni+Co is 2.5% or more, with the balance comprising Fe and unavoidable impurities. The ratio Ca/O of the content of Ca to the content of O is 0.3-1.0. The duplex stainless steel slabs and duplex stainless steel material are also provided. <P>COPYRIGHT: (C)2013,JPO&INPIT |
