US Patent Issued to JFE Steel on Feb. 24 for "High-strength steel sheet and method for producing same" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,815, issued on Feb. 24, was assigned to JFE Steel Corp. (Tokyo).

"High-strength steel sheet and method for producing same" was invented by Ryohei Morimoto (Tokyo), Lingling Yang (Tokyo) and Yuki Toji (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A high-strength steel sheet having a tensile strength of 1320 MPa or more is disclosed. The above-described high-strength steel sheet includes a specific component composition, wherein a diffusible hydrogen in steel is 0.50 ppm by mass or less, tempered martensite and bainite are 70.0% or more, fresh martensite is 15.0% or less, iron-based carbides existing in the tempered martensite and the bainite ...