Title:
AUSTENITIC STAINLESS STEEL HAVING EXCELLENT LOW-TEMPERATURE IMPACT TOUGHNESS AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2024/080474
Kind Code:
A1
Abstract:
According to an embodiment of the present invention, an austenitic stainless steel can be provided comprising, in weight percentage, C: 0.03% or less (excluding 0), N: 0.15 to 0.25%, Si: 1.0% or less (excluding 0), Mn: 3.3 to 7.5%, Cr: 17.0 to 22.0%, Ni: 6.5 to 9.5%, Cu: 1.2% or less (excluding 0), Mo: 0.8% or less (excluding 0), and the balance being Fe and inevitable impurities, wherein the austenitic stainless steel satisfies formula (1): 70≤(100-ASP)/(Ni/Mn)≤170, and the Charpy impact energy at -196°C is 120 J or more (where ASP represents the austenite phase stability and ASP is calculated by 551-462(C+N)-9.2Si-8.1Mn-13.7Cr-29(Ni+Cu)-18.5Mo (Ni and Mn represent the weight percentages of respective elements thereof).
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Inventors:
SONG SEOKWEON (KR)
KIM KWANGMIN (KR)
LEE HONGJU (KR)
KIM INHO (KR)
KIM KWANGMIN (KR)
LEE HONGJU (KR)
KIM INHO (KR)
Application Number:
PCT/KR2023/006957
Publication Date:
April 18, 2024
Filing Date:
May 23, 2023
Export Citation:
Assignee:
POSCO CO LTD (KR)
International Classes:
C22C38/58; C21D8/02; C22C38/42; C22C38/44
Foreign References:
| KR20220071006A | 2022-05-31 | |||
| JP2017008413A | 2017-01-12 | |||
| KR20200045907A | 2020-05-06 | |||
| KR20170107067A | 2017-09-22 | |||
| CN112877589A | 2021-06-01 |
Attorney, Agent or Firm:
SELIM INTELLECTUAL PROPERTY LAW FIRM (KR)
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