MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202617080056 A) filed by Hyundai Steel Company on June 29, 2026, for Ultrahigh-Strength Cold Rolled Steel Sheet Having Excellent Hydrogen Embrittlement Resistance, And Manufacturing Method Therefor.
Inventors include Park, Bong June; Jang, Min Ho; and Han, Seong Kyung.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: The present invention provides an ultrahigh-strength cold rolled steel sheet having a tensile strength of 1,100 MPa or more and excellent hydrogen embrittlement resistance, and a manufacturing method therefor. According to one embodiment of the present invention, the ultrahigh-strength cold rolled steel sheet having excellent hydrogen embrittlement resistance comprises, by wt%, 0.1-0.5% of carbon (C), 0.01-2.0% of silicon (Si), 0.1-5.0% of manganese (Mn), 0.01-2.0% of aluminum (Al), more than 0% and less than or equal to 3.0% of chromium (Cr), more than 0% and less than or equal to 1.0% of molybdenum (Mo), more than 0% and less than or equal to 0.4% of nickel (Ni), 0.05-0.4% of copper (Cu), 0.01-0.2% of titanium (Ti), 0.01-0.1% of niobium (Nb), 0.01-1.0% of vanadium (V), 0.001-0.005% of boron (B), more than 0% and less than or equal to 0.02% of phosphorus (P), more than 0% and less than or equal to 0.01% of sulfur (S), and the balance of iron (Fe) and other inevitable impurities, and satisfies a tensile strength (TS) of at least 1,100 MPa, an elongation (EL) of at least 3% and a hydrogen embrittlement test non-fracture time of at least 100 hours.
Disclaimer: Curated by HT Syndication.
