Title:
AUSTENITE HIGH-MANGANESE STAINLESS STEEL, MANUFACTURING METHOD THEREFOR, AND MEMBER USING SAID STEEL
Document Type and Number:
WIPO Patent Application WO/2012/043877
Kind Code:
A1
Abstract:
An inexpensive stainless steel and inexpensive, high-strength stainless steel that are highly resistant to hydrogen environment embrittlement even when used in a hydrogen environment comprising high-pressure hydrogen gas, at a pressure exceeding 40 MPa, or liquid hydrogen. Said stainless steel contains, by mass, 0.4-1.5% silicon, 8-11% manganese, 15-17% chromium, 5-8% nickel, 1-4% copper, at least 0.01% but less than 0.15% nitrogen, and at most 0.1% carbon, with the remainder comprising iron and unavoidable impurities. The volume ratio of δ-ferrite is 10% or less, with the pre-annealing major axis thereof being 0.04 to 0.1 mm.
Inventors:
HATANO MASAHARU (JP)
FUKUMOTO SHIGEO (JP)
FUJII HIDEKI (JP)
OHMIYA SHINICHI (JP)
FUKUMOTO SHIGEO (JP)
FUJII HIDEKI (JP)
OHMIYA SHINICHI (JP)
Application Number:
PCT/JP2011/073030
Publication Date:
April 05, 2012
Filing Date:
September 29, 2011
Export Citation:
Assignee:
NIPPON STEEL & SUMIKIN SST (JP)
HATANO MASAHARU (JP)
FUKUMOTO SHIGEO (JP)
FUJII HIDEKI (JP)
OHMIYA SHINICHI (JP)
HATANO MASAHARU (JP)
FUKUMOTO SHIGEO (JP)
FUJII HIDEKI (JP)
OHMIYA SHINICHI (JP)
International Classes:
C22C38/00; C21D8/00; C22C38/58; F16J12/00; F16K27/00; F16L9/02
Domestic Patent References:
| WO2004083477A1 | 2004-09-30 | |||
| WO2004083476A1 | 2004-09-30 | |||
| WO2004083477A1 | 2004-09-30 | |||
| WO2007052773A1 | 2007-05-10 |
Foreign References:
| JP2007126688A | 2007-05-24 | |||
| JPH0770700A | 1995-03-14 | |||
| JP2009030128A | 2009-02-12 | |||
| JP2010196142A | 2010-09-09 | |||
| JP2009299174A | 2009-12-24 | |||
| JP2010121190A | 2010-06-03 | |||
| JP2005154890A | 2005-06-16 |
Other References:
MASAHARU HATANO ET AL.: "Suiso Energy Yo Tei Ni Austenitic Stainless Steel no Kaihatsu", CURRENT ADVANCES IN MATERIALS AND PROCESSES, vol. 20, no. 6, 1 September 2007 (2007-09-01), pages 1068 - 1071, XP008170167
See also references of EP 2623624A4
See also references of EP 2623624A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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Claims: