US Patent Issued to JFE Steel on Feb. 17 for "Electric resistance welded steel pipe, method for producing the same, line pipe, and building structure" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 17 -- United States Patent no. 12,553,544, issued on Feb. 17, was assigned to JFE Steel Corp. (Tokyo).

"Electric resistance welded steel pipe, method for producing the same, line pipe, and building structure" was invented by Akihide Matsumoto (Tokyo), Shinsuke Ide (Tokyo) and Takatoshi Okabe (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An electric resistance welded steel pipe includes a base metal zone and an electric resistance welded zone. The base metal zone has a predetermined chemical composition and a microstructure including, by volume, ferrite: more than 30%, and bainite: 10% or more. The total volume fraction of the ferrite and the bainite is 70% or more and 95% or les...