US Patent Issued to POSCO on Dec. 9 for "Ultra high strength and high ductility steel sheet having excellent yield ratio and manufacturing method for same" (South Korean Inventors)

ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,492,456, issued on Dec. 9, was assigned to POSCO Co. LTD (Pohang-si, South Korea).

"Ultra high strength and high ductility steel sheet having excellent yield ratio and manufacturing method for same" was invented by Joo-Hyun Ryu (Gwangyang-si, South Korea), Kyoo-Young Lee (Gwangyang-si, South Korea) and Sea-Woong Lee (Gwangyang-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "An ultra high strength and high ductility steel sheet having an excellent yield ratio contains, in weight %, 0.1-0.3% of carbon (C), 2% or less of silicon (Si), 6-10% of manganese (Mn), 0.05% or less of phosphorus (P), 0.02% or less of sulfur (S), 0.02% or less of nitro...