MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202617078455 A) filed by Hyundai Steel Company on June 25, 2026, for Ultra-High 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 ultra-high strength cold-rolled steel sheet having a strength of 1100 MPa or more on the basis of tensile strength and excellent hydrogen embrittlement resistance, and a manufacturing method therefor. According to one embodiment of the present invention, the ultra-high strength cold-rolled steel sheet having excellent hydrogen embrittlement resistance comprises by wt%, carbon (C): 0.1-0.5%, silicon (Si): 0.01-2.0%, manganese (Mn): 0.1-5.0%, aluminum (Al): 0.01-2.0%, chromium (Cr): more than 0% to 3.0%, molybdenum (Mo): more than 0% to 1.0%, nickel (Ni): more than 0% to 0.4%, copper (Cu): 0.05-0.4%, titanium (Ti): 0.01-0.2%, niobium (Nb): 0.01-0.1%, vanadium (V): 0.01-1.0%, boron (B): 0.001-0.005%, phosphorus (P): more than 0% to 0.02%, sulfur (S): more than 0% to 0.01%, and the balance of iron (Fe) and other inevitable impurities, and includes a hot-dip galvanized layer or an alloyed hot-dip galvanized layer on the surface, wherein the steel sheet satisfies a tensile strength (TS) of 1100 MPa or more, an elongation (EL) of 3% or more, and a fracture-free time of 100 hours or more on the basis of a hydrogen embrittlement test method.
Disclaimer: Curated by HT Syndication.
