US Patent Issued to JFE Steel on March 25 for "Steel sheet, member, and methods for manufacturing the same" (Japanese Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,647, issued on March 25, was assigned to JFE Steel Corp. (Tokyo).

"Steel sheet, member, and methods for manufacturing the same" was invented by Yusuke Wada (Tokyo), Tatsuya Nakagaito (Tokyo), Shotaro Terashima (Tokyo), Lingling Yang (Tokyo) and Takeshi Yokota (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A steel sheet according to the present invention has a specific chemical composition and a steel microstructure including, in terms of area fraction, ferrite: 40% or more and 70% or less, a total of bainite and tempered martensite: 5% or more and 30% or less, retained austenite: 4% or more and 18% or less, fresh martensite: 8% or more and 3...