Title:
オーステナイト系ステンレス鋼管
Document Type and Number:
Japanese Patent JP5187461
Kind Code:
B2
Abstract:
There is provided an austenitic stainless steel tube containing, by mass percent, 14 to 28% of Cr and 6 to 30% of Ni, wherein the steel tube has a metal micro-structure, in which an average dislocation density, which is determined by XRD measurement using a Co tube, is 3.0 × 10 14 /m 2 or higher, on the inner surface side of the steel tube. The crystal grain size of the steel tube is preferably 50 µm or smaller. The steel tube of the present invention is suitable as a steel tube used in power-generating plants.
Inventors:
Yoshitaka Nishiyama
Mitsuharu Yonemura
Mitsuharu Yonemura
Application Number:
JP2012524959A
Publication Date:
April 24, 2013
Filing Date:
May 28, 2012
Export Citation:
Assignee:
Nippon Steel & Sumitomo Metal Corporation
International Classes:
C22C38/00; B21B3/00; C22C38/40; C21D7/06; C22C38/58
Domestic Patent References:
| JP2009068079A | 2009-04-02 | |||
| JP2006307313A | 2006-11-09 | |||
| JPH06322489A | 1994-11-22 | |||
| JP2004359991A | 2004-12-24 | |||
| JPH09249946A | 1997-09-22 | |||
| JP2009068079A | 2009-04-02 | |||
| JP2006307313A | 2006-11-09 | |||
| JPH06322489A | 1994-11-22 | |||
| JP2004359991A | 2004-12-24 |
Attorney, Agent or Firm:
Mikiji Sugioka
Chihara
Chihara