发明授权
- 专利标题： Method of producing electric-resistance-welded stainless clad steel pipe or tube
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申请号： US16311831申请日： 2017-04-19
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公开(公告)号： US10724670B2公开(公告)日： 2020-07-28
- 发明人: Shinsuke Ide , Atsushi Matsumoto , Yuji Hashimoto , Takatoshi Okabe
- 申请人： JFE STEEL CORPORATION
- 申请人地址： JP Chiyoda-ku, Tokyo
- 专利权人： JFE STEEL CORPORATION
- 当前专利权人： JFE STEEL CORPORATION
- 当前专利权人地址： JP Chiyoda-ku, Tokyo
- 代理机构： Kenja IP Law PC
- 优先权： com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@6d605408 com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@322f16ba
- 国际申请： PCT/JP2017/015789 WO 20170419
- 国际公布： WO2018/003248 WO 20180104
- 主分类号： F16L9/02
- IPC分类号： F16L9/02 ; F16L57/02 ; F16L58/08 ; B23K31/02 ; B21C37/08 ; B21C51/00 ; B23K20/227 ; B23K11/087 ; B23K11/34 ; B23K11/16 ; B23K20/02 ; B23K20/04 ; B23K13/08 ; C22C38/58 ; C22C38/44 ; B23K11/00 ; F16L9/16 ; F16L9/18 ; B23K11/08 ; B23K13/02 ; F16L9/17 ; C22C38/12 ; C22C38/40 ; C22C38/20 ; C22C38/24 ; C22C38/48 ; C22C38/22 ; C22C38/42 ; C22C38/00 ; C22C38/18 ; C22C38/02 ; C22C38/06 ; C22C38/26 ; C22C38/50 ; C22C38/38 ; C22C38/08 ; C22C38/46 ; C22C38/04 ; C22C38/14 ; C22C38/28 ; C22C38/16 ; B32B15/04 ; B32B15/01 ; B32B15/00 ; B32B1/08 ; B32B15/18 ; B23K101/06 ; B23K103/04 ; B23K101/10 ; B23K103/18
摘要：
An electric-resistance-welded stainless clad steel pipe or tube that is excellent in both the fracture property of the weld and the corrosion resistance of the pipe or tube inner surface as electric resistance welded without additional welding treatment such as weld overlaying after electric resistance welding is provided. An electric-resistance-welded stainless clad steel pipe or tube comprises: an outer layer of carbon steel or low-alloy steel; and an inner layer of austenitic stainless steel having a predetermined chemical composition, wherein a flatness value h/D in a 90° flattening test in accordance with JIS G 3445 is less than 0.3, and a pipe or tube inner surface has no crack in a sulfuric acid-copper sulfate corrosion test in accordance with ASTM A262-10, Practice E, where h is a flattening crack height (mm), and D is a pipe or tube outer diameter (mm).
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