Title:
マルテンサイト系ステンレス継目無鋼管
Document Type and Number:
Japanese Patent JP7397375
Kind Code:
B2
Abstract:
A martensitic stainless steel seamless pipe having a yield strength of 655 MPa or more and excellent corrosion resistance, and in which formation of an inner surface flaw has been suppressed is provided. The martensitic stainless steel seamless pipe according to the present disclosure has a chemical composition containing, in mass%, C: 0.001 to 0.050%, Si: 0.05 to 1.00%, Mn: 0.05 to 2.00%, P: 0.030% or less, S: 0.0100% or less, Al: 0.005 to 0.100%, N: 0.020% or less, Ni: 1.00 to 9.00%, Cr: 8.00 to 16.00%, Cu: 3.50% or less, Mo: 1.00 to 5.00%, W: 0.01 to 0.30%, V: 0.010 to 1.500%, and Co: 0.001 to 0.500%, and also containing one or more elements selected from the group consisting of Ca, Mg, B, and rare earth metal, with the balance being Fe and impurities, and has a yield strength of 655 MPa or more.
Inventors:
Yukiyo Kato
Yusuke Tomio
Yusuke Tomio
Application Number:
JP2022514080A
Publication Date:
December 13, 2023
Filing Date:
April 06, 2021
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C22C38/00; B21B19/04; C22C38/58
Domestic Patent References:
| JP2017039964A |
Foreign References:
| WO2020067247A1 | ||||
| WO2020013197A1 | ||||
| WO2019065114A1 | ||||
| WO2017168874A1 |
Attorney, Agent or Firm:
Ascend Patent Attorneys Corporation