US Patent Issued to NIPPON STEEL on Sept. 30 for "Hot-rolled steel sheet and method for manufacturing same" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,694, issued on Sept. 30, was assigned to NIPPON STEEL Corp. (Tokyo).

"Hot-rolled steel sheet and method for manufacturing same" was invented by Tatsuo Yokoi (Tokyo), Teruki Hayashida (Tokyo), Mutsumi Sakakibara (Tokyo), Jun Ando (Tokyo), Shinsuke Kai (Tokyo) and Hiroshi Shuto (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "This hot-rolled steel sheet has a predetermined chemical composition, and in a case where the thickness is denoted by t, the metallographic structure at a t/4 position from the surface contains one or both of tempered martensite and lower bainite at a volume percentage of 90% or more, the tensile strength is 980 MPa or more...