US Patent Issued to JFE STEEL on March 25 for "High-strength steel sheet and method for producing the same" (Japanese Inventors)

ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,645, issued on March 25, was assigned to JFE STEEL Corp. (Tokyo).

"High-strength steel sheet and method for producing the same" was invented by Takuya Hirashima (Tokyo), Yuma Honda (Tokyo), Akinori Nakamura (Tokyo) and Shinjiro Kaneko (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A high-strength steel sheet having a low yield ratio and a method for producing the same. The high-strength steel sheet has a specified chemical composition and a microstructure in which ferrite is present as a major phase, and martensite is present in an area fraction of 10% or greater and less than 50% relative to an entire area of the microstructure. The martens...