NON-MAGNETIC AUSTENITIC STAINLESS STEEL MATERIAL AND PRODUCTION METHOD THEREFOR

The present invention relates to a non-magnetic austenitic stainless steel material having a component composition containing, in terms of mass percent, C: < 0.10%, Si: < 0.3%, Mn: more than 4.5% to less than 10.0%, P: < 0.05%, S: < 0.0020%, Ni: 9.0% to 15.0%, Cr: 17.0% to 25.0%, Mo: 3.0...

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Bibliographische Detailangaben
Hauptverfasser:	Koyanagi, Yoshihiko, Furusho, Chihiro
Format:	Patent
Sprache:	eng ; fre ; ger
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:	The present invention relates to a non-magnetic austenitic stainless steel material having a component composition containing, in terms of mass percent, C: < 0.10%, Si: < 0.3%, Mn: more than 4.5% to less than 10.0%, P: < 0.05%, S: < 0.0020%, Ni: 9.0% to 15.0%, Cr: 17.0% to 25.0%, Mo: 3.0% to 7.0%, and N: 0.3% to 0.6%, with the balance being Fe and unavoidable impurities; satisfying (40[N]+1.2[Cr]+0.07exp(0.3[Ni]+0.3[Cu]))×1.5[Mo]^(-0.18) ≤ 60, in which [M] represents a content of an element M in terms of mass%; having an austenite single phase structure; having a critical pitting temperature of 50°C or higher; and having a 0.2% proof stress of 970 MPa or more.