ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,169, issued on June 2, was assigned to JFE Steel Corp. (Tokyo).
"Steel sheet, member, and methods for manufacturing the same" was invented by Taiyo Asakawa (Tokyo), Shimpei Yoshioka (Tokyo) and Shinjiro Kaneko (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are a steel sheet and a member, having high strength and high delayed fracture resistance, and methods for manufacturing the steel sheet and the member. The steel sheet has a specific chemical composition and a microstructure in which the area fraction of martensite is 95% to 100%, with the balance being one or more of bainite, ferrite, and retained austenite. In the steel sheet, pr...