Title:
STAINLESS STEEL HAVING EXCELLENT ROUGE RESISTANCE, STAINLESS STEEL PIPE, AND PURE STEAM PASSAGE MEMBER
Document Type and Number:
WIPO Patent Application WO/2020/145395
Kind Code:
A1
Abstract:
The present invention provides a stainless steel having a composition which includes 0.1 mass% or less of C, 1.0 mass% or less of Si, 2.0 mass% or less of Mn, 0.045 mass% or less of P, 0.03 mass% or less of S, 30 mass% or less of Ni, 16-35 mass% of Cr, 6.0 mass% or less of Mo, 0.8 mass% or less of Cu, and 0.3 mass% or less of N, the remainder comprising Fe and unavoidable impurities, and which satisfies the relationship in formula (1) (element symbols in the formula representing the content of the element). In this stainless steel, the Cr concentration in a passive film is 40 at% or greater. (1): Cr + 0.5Mo ≥ 19
Inventors:
SEKIMUKAI KOTARO (JP)
SAIDA TOMOAKI (JP)
IMAKAWA KAZUNARI (JP)
NAKAUE SUSUMU (JP)
AKAJI HIROTSUGU (JP)
HIROZUMI SHIROU (JP)
NAKAJIMA TAKAFUMI (JP)
NOBUHARA YUTA (JP)
MATSUMOTO TOSHIJI (JP)
KAMADA MASAKATSU (JP)
SAIDA TOMOAKI (JP)
IMAKAWA KAZUNARI (JP)
NAKAUE SUSUMU (JP)
AKAJI HIROTSUGU (JP)
HIROZUMI SHIROU (JP)
NAKAJIMA TAKAFUMI (JP)
NOBUHARA YUTA (JP)
MATSUMOTO TOSHIJI (JP)
KAMADA MASAKATSU (JP)
Application Number:
PCT/JP2020/000726
Publication Date:
July 16, 2020
Filing Date:
January 10, 2020
Export Citation:
Assignee:
NIPPON STEEL STAINLESS STEEL PIPE CO LTD (JP)
TOSTE CO LTD (JP)
DAIICHI SANKYO PROPHARMA CO LTD (JP)
TOSTE CO LTD (JP)
DAIICHI SANKYO PROPHARMA CO LTD (JP)
International Classes:
C25F3/24; C22C38/00; C22C38/58; C25D11/36
Foreign References:
| JP2000176643A | 2000-06-27 | |||
| JPH0633192A | 1994-02-08 | |||
| JPH07243000A | 1995-09-19 | |||
| JP2016216782A | 2016-12-22 | |||
| JPH1129877A | 1999-02-02 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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