TWO-PHASE STAINLESS STEEL, THIN SHEET MATERIAL AND DIAPHRAGM USING TWO-PHASE STAINLESS STEEL
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United States of America Patent
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Mar 19, 2015
app pub date -
Sep 2, 2014
filing date -
Sep 19, 2013
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To provide a two-phase stainless steel, a thin sheet material and a diaphragm including the same capable of achieving high strength and excellent corrosion resistance as well as obtaining a smooth surface state. The two-phase stainless steel of the present invention includes a composition of Cr: 24 to 26 mass %, Mo: 2.5 to 3.5 mass %, Ni: 5.5 to 7.5 mass %, C≦0.03 mass %, N: 0.08 to 0.3 mass %, remaining part: Fe and unavoidable impurities, in which 2.0 mass % or less of Mn is contained if necessary, and the particle size of inclusion particles including an Al oxide or a Mn oxide caused by unavoidable impurities Al and Mn existing in a metal structure is 3 μm or less.
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