US Patent Issued to JFE Steel on July 15 for "Stainless steel pipe and method for manufacturing same" (Japanese Inventors)

ALEXANDRIA, Va., July 16 -- United States Patent no. 12,359,752, issued on July 15, was assigned to JFE Steel Corp. (Tokyo).

"Stainless steel pipe and method for manufacturing same" was invented by Shunsuke Sasaki (Tokyo), Masao Yuga (Tokyo), Tatsuro Katsumura (Tokyo) and Hideo Kijima (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A stainless steel pipe of a predetermined composition is provided that has an axial tensile yield strength of 689 MPa or more, an axial compressive yield strength/axial tensile yield strength ratio of 0.85 to 1.15, and a microstructure that is 20 to 80% ferrite phase by volume with the remainder containing an austenite phase, the stainless steel pipe having pipe end portions...