STAINLESS STEEL AND STAINLESS STEEL PIPE HAVING EXCELLENT ROUGE RESISTANCE, AND PURE STEAM ROUTE MEMBER

To provide a stainless steel having excellent rouge resistance.SOLUTION: A stainless steel has a composition that comprises C: 0.1 mass% or less, Si: 1.0 mass% or less, Mn: 2.0 mass% or less, P: 0.045 mass% or less, S: 0.03 mass% or less, Ni: 30 mass% or less, Cr: 16-35 mass%, Mo: 6.0 mass% or less,...

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Hauptverfasser:	IMAGAWA KAZUNARI, NOBUHARA YUTA, KAMATA MASAKATSU, NAKAGAMI SUSUMU, AKAJI HIROTSUGU, SAIDA TOMOAKI, NAKAJIMA TAKASHI, MATSUMOTO TOSHIJI, SEKIMUKAI KOTARO, HIROZUMI SHIRO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ALLOYS APPARATUS THEREFOR CHEMISTRY ELECTROFORMING ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FERROUS OR NON-FERROUS ALLOYS METALLURGY PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	To provide a stainless steel having excellent rouge resistance.SOLUTION: A stainless steel has a composition that comprises C: 0.1 mass% or less, Si: 1.0 mass% or less, Mn: 2.0 mass% or less, P: 0.045 mass% or less, S: 0.03 mass% or less, Ni: 30 mass% or less, Cr: 16-35 mass%, Mo: 6.0 mass% or less, Cu: 0.8 mass% or less, N: 0.3 mass% or less with the balance being Fe and inevitable impurities, and meets the relationship of formula (1) (where each element symbol denotes the content of each element). In the stainless steel, a passive coating has a Cr concentration of 40 atom% or more. Cr+0.5Mo≥19 (1).SELECTED DRAWING: None 【課題】耐ルージュ性に優れたステンレス鋼を提供する。【解決手段】Ｃ:０．１質量％以下、Ｓｉ：１．０質量％以下、Ｍｎ：２．０質量％以下、Ｐ：０．０４５質量％以下、Ｓ：０．０３質量％以下、Ｎｉ：３０質量％以下、Ｃｒ：１６〜３５質量％、Ｍｏ：６．０質量％以下、Ｃｕ：０．８質量％以下、Ｎ：０．３質量％以下を含み、残部がＦｅ及び不可避的不純物からなると共に、下記式（１）の関係（式中、各元素記号は、各元素の含有量を意味する）を満たす組成を有するステンレス鋼である。このステンレス鋼は、不働態皮膜中のＣｒ濃度が４０原子％以上である。Ｃｒ＋０．５Ｍｏ≧１９（１）【選択図】なし