AUSTENITIC STAINLESS STEEL AND METHOD FOR PRODUCING THE SAME

To provide an austenitic stainless steel that has hardness equivalent to that of martensitic stainless steel while maintaining non-magnetic properties, and also holds high strength and a method for producing the same.SOLUTION: An austenitic stainless steel comprises, in percentages by weight, C: 0.1...

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Bibliographische Detailangaben
Hauptverfasser: YOSHIDA NAOZUMI, OZAWA SHIGETA, YAMAMOTO YUSUKE
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide an austenitic stainless steel that has hardness equivalent to that of martensitic stainless steel while maintaining non-magnetic properties, and also holds high strength and a method for producing the same.SOLUTION: An austenitic stainless steel comprises, in percentages by weight, C: 0.18-0.33%, Si: 0.30% or less, Mn: 1.8-4.0%, (P: 0.030% or less) S: 0.30% or less, Cr: 21.0-25.0%, Ni: 7.0-11.0%, Cu: 1.0% or less, Nb: 0.20% or less, B: 0.005% or less, N: 0.20-0.35%, the balance being Fe and unavoidable impurities, with its hardness exceeding 50 HRC in Rockwell C scale.SELECTED DRAWING: None 【課題】非磁性の特性を維持しながら、マルテンサイト系ステンレス鋼並みの硬度を有し、かつ高強度を保持するオーステナイト系ステンレス鋼材およびその製造方法を提供する。【解決手段】重量%で、C:0.18~0.33%、Si:0.30%以下、Mn:1.8~4.0%、(P:0.030%以下)S:0.30%以下、Cr:21.0~25.0%、Ni:7.0~11.0%、Cu:1.0%以下、Nb:0.20%以下、B:0.005%以下、N:0.20~0.35%であり、残余Feおよび不可避不純物からなり、硬さがロックウェルCスケールで50HRCを超えるオーステナイト系ステンレス鋼材とする。【選択図】なし