AUSTENITIC STAINLESS STEEL SHEET AND STEEL PIPE AND METHOD FOR PRODUCING THE SAME

To provide an austenitic stainless steel sheet and steel pipe having high resistance to hydrogen embrittlement and hot crack, and a method for producing the same.SOLUTION: An austenitic stainless steel sheet has a chemical composition consisting of, in mass%, C: 0.10% or less, Si: 1.0% or less, Mn:...

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Hauptverfasser:	MATSUMOTO KAZUHISA, HATANO MASAHARU, MATSUMOTO MITSUKI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	To provide an austenitic stainless steel sheet and steel pipe having high resistance to hydrogen embrittlement and hot crack, and a method for producing the same.SOLUTION: An austenitic stainless steel sheet has a chemical composition consisting of, in mass%, C: 0.10% or less, Si: 1.0% or less, Mn: 8.0-10.0%, P: 0.030% or less, S: 0.0030% or less, Cr: 15.0-18.0%, Ni: 7.0-9.0%, N: 0.15-0.25%, Al: 0.005-0.20%, Ca: 0.0005-0.01%, B: 0.0002-0.01%, Mg: 0.0001-0.0050%, Cu: less than 1.0%, Mo: 0.5% or less, O: 0.0050% or less, an optional element, with the balance being Fe and impurities. An f value, calculated by [Ni+0.72Cr+0.88Mo+1.11Mn-0.27Si+12.93C+7.55N], is more than 29.5 to less than 32.5.SELECTED DRAWING: None 【課題】耐水素脆化性と耐高温割れ性とに優れたオーステナイト系ステンレス鋼板および鋼管ならびにこれらの製造方法を提供する。【解決手段】化学組成が、質量％で、Ｃ：0.10％以下、Ｓｉ：1.0％以下、Ｍｎ：8.0～10.0％、Ｐ：0.030％以下、Ｓ：0.0030％以下、Ｃｒ：15.0～18.0％、Ｎｉ：7.0～9.0％、Ｎ：0.15～0.25％、Ａｌ：0.005～0.20％、Ｃａ：0.0005～0.01％、Ｂ：0.0002～0.01％、Ｍｇ：0.0001～0.0050％、Ｃｕ：1.0％未満、Ｍｏ：0.5％以下、Ｏ：0.0050％以下、任意元素、残部：Ｆｅおよび不純物であり、［Ｎｉ＋0.72Ｃｒ＋0.88Ｍｏ＋1.11Ｍｎ－0.27Ｓｉ＋12.93Ｃ＋7.55Ｎ］で算出されるｆ値が、29.5超32.5未満である、オーステナイト系ステンレス鋼板。【選択図】なし