US Patent Issued to JFE Steel on May 13 for "High strength steel sheet, impact absorbing member, and method for manufacturing high strength steel sheet" (Japanese Inventors)

ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,543, issued on May 13, was assigned to JFE Steel Corp. (Tokyo).

"High strength steel sheet, impact absorbing member, and method for manufacturing high strength steel sheet" was invented by Yoshiyasu Kawasaki (Tokyo), Muneka Iwasawa (Tokyo), Yuki Toji (Tokyo) and Yoshimasa Funakawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A high strength steel sheet has a yield-point elongation of 1.0% or greater and a tensile strength of 980 MPa or greater. The high strength steel sheet has a specific chemical composition and microstructure. The ferrite has an average grain size of 5.0 micro metre or less, the retained austenite has an average grain siz...