Title:
AUSTENITIC STAINLESS STEEL MATERIAL
Document Type and Number:
WIPO Patent Application WO/2017/175739
Kind Code:
A1
Abstract:
Provided is an austenitic stainless steel material which has stable high strength along the entire length of the steel material. An austenitic stainless steel material according to one embodiment of the present invention has a chemical composition that contains, in mass%, 0.10% or less of C, 1.0% or less of Si, 3-8% of Mn, 0.05% or less of P, 0.03% or less of S, 10-20% of Ni, 15-30% of Cr, 0.20-0.70% of N, 0-5.0% of Mo, 0-0.5% of V and 0-0.5% of Nb, with the balance made up of Fe and impurities, while having a crystal grain size number of 6.0 or greater in accordance with ASTM E 112. This austenitic stainless steel material has a tensile strength of 800 MPa or more; and the difference between the maximum value and the minimum value of the tensile strength is 50 MPa or less. The number of alloy carbonitrides having a circle-equivalent diameter of more than 1,000 nm in the steel is 10 carbonitrides/mm2 or more.
More Like This:
| WO/2021/039971 | HOT-STAMPED ARTICLE |
| WO/2003/033757 | METHOD FOR PRODUCING NITRIDING STEEL |
| JP2002348615 | HIGH BEARING PRESSURE RESISTANT MEMBER AND MANUFACTURING METHOD THEREFOR |
Inventors:
TAKAGI TAKAMITSU (JP)
NAKAMURA JUN (JP)
UEYAMA MASAKI (JP)
TERUNUMA MASAAKI (JP)
NAKAMURA JUN (JP)
UEYAMA MASAKI (JP)
TERUNUMA MASAAKI (JP)
Application Number:
PCT/JP2017/014008
Publication Date:
October 12, 2017
Filing Date:
April 04, 2017
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
C22C38/00; C21D8/00; C22C38/58
Domestic Patent References:
| WO2012132992A1 | 2012-10-04 | |||
| WO2015159554A1 | 2015-10-22 | |||
| WO2016068009A1 | 2016-05-06 |
Other References:
See also references of EP 3441495A4
Attorney, Agent or Firm:
ASCEND IP LAW FIRM (JP)
Download PDF: