US Patent Issued to JFE STEEL on June 24 for "Steel sheet, member, and methods for producing the same" (Japanese Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,505, issued on June 24, was assigned to JFE STEEL Corp. (Tokyo).

"Steel sheet, member, and methods for producing the same" was invented by Takuya Hirashima (Tokyo), Shimpei Yoshioka (Tokyo), Shinjiro Kaneko (Tokyo), Soshi Yoshimoto (Tokyo), Tomohiro Hashimukai (Tokyo) and Yoshihiko Ono (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A steel sheet having a steel microstructure including, by area %, martensite in a range of 20% or more and 100% or less, ferrite in a range of 0% or more and 80% or less, and the balance being 5% or less. A residual stress generated at the transverse center of the steel sheet when the steel sheet is subjected to a ...