Title:
AUSTENITIC STAINLESS STEEL HAVING IMPROVED HYDROGEN EMBRITTLEMENT RESISTANCE, AND HIGH-PRESSURE HYDROGEN GAS CONTAINER COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2018/088652
Kind Code:
A1
Abstract:
Disclosed are an austenitic stainless steel having improved hydrogen embrittlement resistance, and a high-pressure hydrogen gas container. The austenitic stainless steel according to one embodiment of the present invention comprises by wt%: 0.1% or less (excluding 0) of C; 1.0% or less (excluding 0) of Si; 2.0% to 7.0% of Mn; 15% to 25% of Cr; 7% to less than 10% of Ni; 0.4% or less (excluding 0) of N, and the balance of Fe and other inevitable impurities, wherein the stacking fault energy (SFE) defined by the following formula (1) is 40-70 mJ/m2. SFE = 4Ni+0.6Cr+7.7Mn-44.7Si+1.2 --- formula (1)
Inventors:
KIM KWANG-MIN (KR)
KIM SUNG JOON (KR)
KIM JI SOO (KR)
KIM SUNG JOON (KR)
KIM JI SOO (KR)
Application Number:
PCT/KR2017/004991
Publication Date:
May 17, 2018
Filing Date:
May 15, 2017
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/58; C22C38/00; C22C38/02; C22C38/44
Foreign References:
| JP2010121190A | 2010-06-03 | |||
| JP2016166401A | 2016-09-15 | |||
| JPH07144294A | 1995-06-06 | |||
| KR20060018250A | 2006-02-28 | |||
| KR101289518B1 | 2013-07-24 | |||
| KR20060018250A | 2006-02-28 | |||
| KR20110004491A | 2011-01-13 |
Other References:
See also references of EP 3540087A4
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
Download PDF: