US Patent Issued to NIPPON STEEL on June 16 for "Hot-rolled steel sheet" (Japanese Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,655,494, issued on June 16, was assigned to NIPPON STEEL Corp. (Tokyo).

"Hot-rolled steel sheet" was invented by Hiroshi Shuto (Tokyo), Kazumasa Tsutsui (Tokyo), Koutarou Hayashi (Tokyo), Akifumi Sakakibara (Tokyo), Jun Ando (Tokyo) and Mitsuru Yoshida (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "This hot-rolled steel sheet has a predetermined chemical composition, in a microstructure, in terms of area %, residual austenite is less than 3.0%, ferrite is 15.0% or more and less than 60.0%, and pearlite is less than 5.0%, an E value that indicates periodicity of the microstructure is 10.7 or more, and an I value that indicates uniformity of the mi...