Title:
STEEL SECTION AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2021/256587
Kind Code:
A1
Abstract:
A steel section according to an embodiment of the present invention comprises: 0.08-0.17 wt% of carbon (C); 0.50-1.60 wt% of manganese (Mn); 0.10-0.50 wt% of silicon (Si); 0.10-0.70 wt% of chromium (Cr); greater than 0 wt% and less than or equal to 0.5 wt% of copper (Cu); 0.30-0.70 wt% of molybdenum (Mo); greater than 0 wt% and less than or equal to 0.02 wt% of phosphorus (P); greater than 0 wt% and less than or equal to 0.01 wt% of sulfur (S); greater than 0 wt% and less than or equal to 0.012 wt% of nitrogen (N); greater than 0 wt% and less than or equal to 0.003 wt% of boron (B); 0.01-0.5 wt% of the combined amount of at least any one selected from nickel (Ni), vanadium (V), niobium (Nb), and titanium (Ti); and the remainder of iron (Fe) and other inevitable impurities, the steel section having at room temperature a tensile strength of 490-620 MPa, a yield strength of 355 MPa or greater, and a yield ratio of 0.8 or less, and having a high-temperature yield strength at 600 °C of 273 MPa or greater.
Inventors:
CHUNG JUN HO (KR)
JANG HONG KI (KR)
JANG HONG KI (KR)
Application Number:
PCT/KR2020/007949
Publication Date:
December 23, 2021
Filing Date:
June 19, 2020
Export Citation:
Assignee:
HYUNDAI STEEL CO (KR)
International Classes:
C22C38/38; C21D1/18; C21D1/63; C21D8/02; C22C38/00; C22C38/20; C22C38/22
Foreign References:
| KR20200012145A | 2020-02-05 | |||
| KR20180074841A | 2018-07-04 | |||
| JP5928654B2 | 2016-06-01 | |||
| KR20200064125A | 2020-06-05 | |||
| US20160333440A1 | 2016-11-17 | |||
| KR20200077701A | 2020-07-01 |
Attorney, Agent or Firm:
AJU INTERNATIONAL LAW & PATENT GROUP (KR)
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