Title:
AUSTENITIC STAINLESS STEEL HAVING IMPROVED CORROSION-RESISTANCE AND WORKABILITY AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2017/209431
Kind Code:
A1
Abstract:
Austenitic stainless steel having improved corrosion-resistance and workability and a method for producing same are disclosed. The austenitic stainless steel according to an embodiment of the present invention comprises, in terms of wt%, 0.05 to 0.1% of carbon (C), 0.2 to 0.7% of silicon (Si), 2.0 to 3.0% of manganese (Mn), 3.0 to 5.0% of nickel (Ni), 17.0 to 19.0% of chrome (Cr), 1.0 to 2.0% of copper (Cu), 0.15 to 0.20% of nitrogen (N), and the remainder of iron (Fe) and other inevitable impurities, and has a crack resistance index (CRN), represented by the following formula (1), of equal to or greater than 0, a Md30 value, represented by the following formula (2), of -20 to 20, and a PREN value, represented by the following formula (3), of equal to or greater than 19:
615 + 777C - 26.3Si - 1.8Mn + 46.2Ni - 56Cr + 33.3Cu + 767N --- formula (1);
551 - 462(C+N) - 9.2Si - 8.1Mn - 13.7Cr - 29(Ni+Cu) --- formula (2); and
Cr + 16N - 0.5Mn --- formula (3).
Inventors:
LEE JAE-HWA (KR)
JO GYU JIN (KR)
KIM BONG-WN (KR)
JO GYU JIN (KR)
KIM BONG-WN (KR)
Application Number:
PCT/KR2017/005349
Publication Date:
December 07, 2017
Filing Date:
May 23, 2017
Export Citation:
Assignee:
POSCO (KR)
International Classes:
C22C38/58; C21D8/02; C22C38/00; C22C38/02; C22C38/42; C22C38/54
Foreign References:
| JP2010121162A | 2010-06-03 | |||
| JPH0686645B2 | 1994-11-02 | |||
| KR20140105849A | 2014-09-02 | |||
| KR20100099726A | 2010-09-13 | |||
| KR20150074697A | 2015-07-02 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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