ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,410,491, issued on Sept. 9, was assigned to JFE Steel Corp. (Tokyo).
"High-strength steel sheet and method for producing the same" was invented by Lingling Yang (Tokyo) and Tatsuya Nakagaito (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A high-strength steel sheet that has a predetermined component composition, that has a steel microstructure in which, in a thickness cross-section in a rolling direction, an area percentage of ferrite ranges from 5% to 30%, a total area percentage of tempered martensite and bainite ranges from 40% to 90%, pearlite constitutes 0% to 5%, a total area percentage of fresh martensite and retained Gamma ranges from 5%...