Title:
二相ステンレス継目無鋼管およびその製造方法
Document Type and Number:
Japanese Patent JP6849104
Kind Code:
B2
Abstract:
The purpose of the present invention is to provide: a duplex stainless steel seamless pipe which has a small difference between the tensile yield strength and the compressive yield strength in the pipe axial direction, while exhibiting excellent corrosion resistance; and a method for producing this duplex stainless steel seamless pipe. A duplex stainless steel seamless pipe which has a component composition containing, in mass%, from 0.005% to 0.08% of C, from 0.01% to 1.0% of Si, from 0.01% to 10.0% of Mn, from 20% to 35% of Cr, from 1% to 15% of Ni, from 0.5% to 6.0% of Mo and 0.005% or more but less than 0.150% of N, with the balance being made up of Fe and unavoidable impurities, and which is configured such that: the tensile yield strength in the pipe axial direction is 689 MPa or more; and the value of (compressive yield strength in pipe axial direction)/(tensile yield strength in pipe axial direction) is from 0.85 to 1.15.
More Like This:
Inventors:
Shunsuke Sasaki
Goto Jingo
Hiroki Ota
Tatsuro Katsumura
Goto Jingo
Hiroki Ota
Tatsuro Katsumura
Application Number:
JP2019568420A
Publication Date:
March 24, 2021
Filing Date:
August 07, 2019
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C22C38/00; C21D8/10; C22C38/58
Domestic Patent References:
| JP2016117944A | ||||
| JP2018193591A |
Foreign References:
| WO2018131412A1 | ||||
| WO2018043214A1 | ||||
| CN103966525A |
Attorney, Agent or Firm:
Isomura Tetsuro
Akira Kumasaka
Tetsuya Sakai
Kazuhiro Mori
Akira Kumasaka
Tetsuya Sakai
Kazuhiro Mori