Title:
AUSTENITIC STAINLESS STEEL
Document Type and Number:
WIPO Patent Application WO/2018/043565
Kind Code:
A1
Abstract:
Provided is an austenitic stainless steel which exhibits excellent polythionic acid SCC resistance and excellent creep ductility. An austenitic stainless steel according to the present embodiment has a chemical composition which contains, in terms of mass%, 0.030% or less of C, 0.10-1.00% of Si, 0.20-2.00% of Mn, 0.040% or less of P, 0.010% or less of S, 16.0-25.0% of Cr, 10.0-30.0% of Ni, 0.1-5.0% of Mo, 0.20-1.00% of Nb, 0.050-0.300% of N, 0.0005-0.100% of sol.Al and 0.0010-0.0080% of B, with the remainder comprising Fe and impurities, and which satisfies formula (1).
B+0.004-0.9C+0.017Mo2 ≥ 0 (1)
Here, the atomic symbols in formula (1) are substituted by the content (mass%) of the corresponding element.
Inventors:
OKADA HIROKAZU (JP)
KURIHARA SHINNOSUKE (JP)
DAN ETSUO (JP)
SETO MASAHIRO (JP)
OSUKI TAKAHIRO (JP)
KURIHARA SHINNOSUKE (JP)
DAN ETSUO (JP)
SETO MASAHIRO (JP)
OSUKI TAKAHIRO (JP)
Application Number:
PCT/JP2017/031157
Publication Date:
March 08, 2018
Filing Date:
August 30, 2017
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C22C38/58
Domestic Patent References:
| WO2009044802A1 | 2009-04-09 | |||
| WO2012134529A1 | 2012-10-04 |
Foreign References:
| JP2014005506A | 2014-01-16 | |||
| JP2012001749A | 2012-01-05 | |||
| JP2015062910A | 2015-04-09 |
Other References:
See also references of EP 3508602A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
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