US Patent Issued to POSCO on May 26 for "Ultra-high-strength hot-rolled steel sheet, steel pipe, member, and manufacturing methods therefor" (South Korean Inventors)

ALEXANDRIA, Va., May 26 -- United States Patent no. 12,637,727, issued on May 26, was assigned to POSCO Co. LTD (Pohang-si, South Korea).

"Ultra-high-strength hot-rolled steel sheet, steel pipe, member, and manufacturing methods therefor" was invented by Hwan-Goo Seong (Gwangyang-si, South Korea), Yeol-Rae Cho (Gwangyang-si, South Korea) and Seong-Beom Bae (Gwangyang-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A preferable aspect of the present invention provides: an ultra-high-strength hot-rolled steel sheet containing, by weight, one or two of 0.40-0.60% of C, 0.7-1.5% of Mn, 0.3% or less (excluding 0%) of Si, 0.03% or less (including 0%) of P, 0.004% or less (including 0%) of S, 0.04% o...