- Patent Title: Super non-magnetic soft stainless steel wire material having excellent cold workability and corrosion resistance, method for manufacturing same, steel wire, steel wire coil, and method for manufacturing same
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Application No.: US14430144Application Date: 2013-09-26
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Publication No.: US09863016B2Publication Date: 2018-01-09
- Inventor: Kohji Takano , Yuya Hikasa , Masayuki Tendo , Yoshinori Tada , Koichi Yoshimura
- Applicant: Nippon Steel & Sumikin Stainless Steel Corporation , SUZUKI-SUMIDEN STAINLESS STEEL WIRE CO., LTD.
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION,SUZUKI-SUMIDEN STAINLESS STEEL WIRE CO., LTD.
- Current Assignee: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION,SUZUKI-SUMIDEN STAINLESS STEEL WIRE CO., LTD.
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JP2012-214059 20120927; JP2013-197097 20130924
- International Application: PCT/JP2013/076011 WO 20130926
- International Announcement: WO2014/050943 WO 20140403
- Main IPC: C22C38/58
- IPC: C22C38/58 ; C22C38/42 ; C21D9/52 ; C21D8/06 ; C22C38/00 ; C22C38/02 ; C22C38/06 ; C22C38/46 ; C22C38/48 ; C22C38/50 ; C22C38/54 ; C21D6/00 ; C22C38/44 ; C22C38/52 ; C21D1/26

Abstract:
This super non-magnetic soft stainless steel wire rod includes, in mass %, C: 0.08% or less, Si: 0.05% to 2.0%, Mn: more than 8.0% to 25.0% or less, P: 0.06% or less, S: 0.01% or less, Ni: more than 6.0% to 30.0% or less, Cr: 13.0% to 25.0%, Cu: 0.2% to 5.0%, N: less than 0.20%, Al: 0.002% to 1.5%, and C+N: less than 0.20%, with the remainder being Fe and inevitable impurities, in which Md30, which is expressed as Equation (a) described below, is −150 or less. Md30=413−462(C+N)−9.2Si−8.1Mn−9.5Ni−13.7Cr−29Cu (a)
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