Title:
HIGHLY CORROSION-RESISTANT AUSTENITIC STAINLESS STEEL HAVING EXCELLENT IMPACT TOUGHNESS AND HOT WORKABILITY
Document Type and Number:
WIPO Patent Application WO/2021/045371
Kind Code:
A1
Abstract:
The present specification discloses highly corrosion-resistant austenitic stainless steel having excellent impact toughness and hot workability. According to one embodiment of the disclosed highly corrosion-resistant austenitic stainless steel, the highly corrosion-resistant austenitic stainless steel comprises, in wt%, 0.03% or less (excluding 0) of C, 1.0% or less of Si, 1.0% or less of Mn, 18 to 24% of Cr, 16 to 24% of Ni, 5.0 to 7.0% of Mo, 0.1 to 2.0% of Cu, 1.0% or less of W, 0.18 to 0.3% of N, 0.02 to 0.1% of Al, 0.01% or less of O, 0.002 to 0.01% of Ca, less than 0.001% of S, and a balance of Fe and inevitable impurities, and satisfies an O/Al of 0.01 to 0.12, and a S/Ca of 0.01 to 0.4.
Inventors:
KIM JISOO (KR)
JO GYUJIN (KR)
LEE MANJAE (KR)
JO GYUJIN (KR)
LEE MANJAE (KR)
Application Number:
PCT/KR2020/008864
Publication Date:
March 11, 2021
Filing Date:
July 07, 2020
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/44; C21D8/02; C22C38/00; C22C38/42; C22C38/60
Foreign References:
| KR920004703A | ||||
| JP2006213950A | 2006-08-17 | |||
| JP2005187904A | 2005-07-14 | |||
| KR19980021576A | 1998-06-25 | |||
| JP2000034546A | 2000-02-02 | |||
| KR20010026770A | 2001-04-06 | |||
| KR19990005962A | 1999-01-25 | |||
| US20150050180A1 | 2015-02-19 |
Other References:
See also references of EP 4023785A4
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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