AUSTENITIC STAINLESS STEEL AND METHOD FOR PRODUCING THE SAME, AND PROCESSED PRODUCT

To provide an inexpensive austenitic stainless steel that has excellent corrosion resistance and can hold non-magnetic properties even when processed.SOLUTION: An austenitic stainless steel contains, by mass, C: 0.010-0.200%, Si: 2.00% or less, Mn: 3.00% or less, P: 0.035% or less, S: 0.0300% or les...

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1. Verfasser:	SEKIMUKAI KOTARO
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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Zusammenfassung:	To provide an inexpensive austenitic stainless steel that has excellent corrosion resistance and can hold non-magnetic properties even when processed.SOLUTION: An austenitic stainless steel contains, by mass, C: 0.010-0.200%, Si: 2.00% or less, Mn: 3.00% or less, P: 0.035% or less, S: 0.0300% or less, Ni: 6.00-14.00%, Cr: 20.0-26.0%, Mo: 3.00% or less, Cu: 0.01-3.00%, Al: 0.200% or less, N: 0.100-0.250%, O: 0.0080% or less with the balance being Fe and impurities. The austenitic stainless steel has Md30 of -95°C or lower, which is represented by the following formula (1), and also has a relative permeability of 1.010 or less before and after the processing. Md30=551-462(C+N)-9.2Si-8.1Mn-13.7Cr-29(Ni+Cu)-18.5Mo (1), where each element symbol denotes the content of each element.SELECTED DRAWING: None 【課題】耐食性に優れ、加工しても非磁性を保持し得る安価なオーステナイト系ステンレス鋼材を提供する。【解決手段】質量基準で、Ｃ：０．０１０～０．２００％、Ｓｉ：２．００％以下、Ｍｎ：３．００％以下、Ｐ：０．０３５％以下、Ｓ：０．０３００％以下、Ｎｉ：６．００～１４．００％、Ｃｒ：２０．０～２６．０％、Ｍｏ：３．００％以下、Ｃｕ：０．０１～３．００％、Ａｌ：０．２００％以下、Ｎ：０．１００～０．２５０％、Ｏ：０．００８０％以下を含み、残部がＦｅ及び不純物からなるオーステナイト系ステンレス鋼材である。このオーステナイト系ステンレス鋼材は、下記式（１）で表されるＭｄ30が－９５℃以下であり、且つ加工前後の比透磁率が１．０１０以下である。Ｍｄ30＝５５１－４６２（Ｃ＋Ｎ）－９．２Ｓｉ－８．１Ｍｎ－１３．７Ｃｒ－２９（Ｎｉ＋Ｃｕ）－１８．５Ｍｏ・・・（１）式中、各元素は、各元素の含有量である。【選択図】なし