Title:
LOW-NI AUSTENITIC STAINLESS STEEL WITH EXCELLENT HOT WORKABILITY AND HYDROGEN EMBRITTLEMENT RESISTANCE
Document Type and Number:
WIPO Patent Application WO/2019/039768
Kind Code:
A1
Abstract:
Disclosed is low-Ni austenitic stainless steel with improved hot workability and hydrogen embrittlement resistance which may occur as content of Mn and Ni decreases. The austenitic stainless steel according to the present invention comprises, by weight %: 0.05 to 0.15% of C; 0.2 to 0.7% of Si; 2.0 to 5.0% of Mn; 2.0 to 5.0% of Ni; 17.0 to 19.0% of Cr; less than 0.1% of P; less than 0.01% of S; 1.0 to 3.0% of Cu; 0.15 to 0.30% of N; and the balance being Fe and inevitable impurities, wherein a crack resistance index (CRN) value is 0 or more, and a Md30 value satisfies a range of -30 to 0°C.
Inventors:
LEE JAE-HWA (KR)
JO GYU JIN (KR)
LEE MUN-SOO (KR)
JO GYU JIN (KR)
LEE MUN-SOO (KR)
Application Number:
PCT/KR2018/008871
Publication Date:
February 28, 2019
Filing Date:
August 06, 2018
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/58; C22C38/00; C22C38/02; C22C38/42; C22C38/54
Foreign References:
| KR20090015817A | 2009-02-12 | |||
| JP2010121162A | 2010-06-03 | |||
| KR20080061861A | 2008-07-03 | |||
| KR20100069875A | 2010-06-25 | |||
| JP2014189800A | 2014-10-06 |
Other References:
See also references of EP 3674434A4
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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