Title:
MARTENSITE STAINLESS STEEL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/202913
Kind Code:
A1
Abstract:
Provided is a martensite stainless steel material which exhibits both high yield strength and excellent SSC resistance. This martensite stainless steel material comprises, in terms of mass%, C: 0.030% or less; Si: 1.00% or less; Mn: 1.00% or less; P: 0.030% or less; S: 0.0050% or less; Cu: 0.01-3.50%; Cr: 10:00-14.00%; Ni: 4.50-7.50%; Mo: 1.00-4.00%; Ti: 0.050-0.300%; V: 0.01-1.00%; Al: 0.001-0.100%; Co: 0.010-0.500%; Ca: 0.0005-0.0050%; Sn: 0.0005-0.0500%, N: 0.0010-0.0500%; O: 0.050% or less; and remainder: Fe and impurities. The martensite stainless steel material has a yield strength of 758 MPa or more. The amounts of the elements contained and the yield strength within these ranges satisfy formula (1) set forth in the description.
Inventors:
KANKI KYOHEI (JP)
TAKABE HIDEKI (JP)
TAKABE HIDEKI (JP)
Application Number:
PCT/JP2022/013603
Publication Date:
September 29, 2022
Filing Date:
March 23, 2022
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C21D8/02; C21D8/06; C21D8/10; C21D9/08; C22C38/00; C22C38/60
Domestic Patent References:
| WO2020202957A1 | 2020-10-08 | |||
| WO2019240127A1 | 2019-12-19 | |||
| WO2008023702A1 | 2008-02-28 |
Foreign References:
| JP2000192196A | 2000-07-11 | |||
| JP2012136742A | 2012-07-19 |
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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