Title:
HOT-ROLLED STEEL MATERIAL FOR TANKS AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2024/009897
Kind Code:
A1
Abstract:
The present invention provides a hot-rolled steel material for tanks, the hot-rolled steel material containing, in mass%, 18.0% to 20.0% of Cr and 8.0% to 13.0% of Ni, while having an Md30 expressed by formula (1) of 35°C or less. With respect to this hot-rolled steel material for tanks, the hydrogen (H) content in a surface layer part, which extends from the surface of the steel material to the position corresponding to 1/5 of the sheet thickness in the depth direction, is 3.5 ppm by mass or less; and the tensile strength is 600 MPa or more. (1): Md30 (°C) = 413 - 462(C + N) -9.2Si - 8.1Mn - 13.7Cr - 9.5(Ni + Cu) -18.5Mo
Inventors:
INUTSUKA JUNPEI (JP)
TSUGE SHINJI (JP)
KUSUNOKI KENICHIRO (JP)
YAMAMOTO YOICHI (JP)
TSUGE SHINJI (JP)
KUSUNOKI KENICHIRO (JP)
YAMAMOTO YOICHI (JP)
Application Number:
PCT/JP2023/024305
Publication Date:
January 11, 2024
Filing Date:
June 30, 2023
Export Citation:
Assignee:
NIPPON STEEL STAINLESS STEEL CORP (JP)
International Classes:
C21D8/02; C22C38/00; C22C38/58
Foreign References:
| JP2016044332A | 2016-04-04 | |||
| JP2015196842A | 2015-11-09 | |||
| JPH0257668A | 1990-02-27 | |||
| CN102605284A | 2012-07-25 |
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
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