US Patent Issued to JFE Steel on Sept. 22 for "High-strength stainless steel seamless pipe for oil country tubular goods and method for manufacturing same" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 24 -- United States Patent no. 12,742,221, issued on Sept. 22, was assigned to JFE Steel Corp. (Tokyo).

"High-strength stainless steel seamless pipe for oil country tubular goods and method for manufacturing same" was invented by Kenichiro Eguchi (Tokyo) and Masao Yuga (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A high-strength stainless steel seamless pipe for oil country tubular goods has a composition that contains, in mass %, C: 0.012 to 0.05%, Si: 0.05 to 0.50%, Mn: 0.04 to 1.80%, P: 0.030% or less, S: 0.005% or less, Cr: 11.0 to 14.0%, Ni: 0.5 to 6.5%, Mo: 0.5 to 3.0%, Al: 0.005 to 0.10%, V: 0.005 to 0.20%, Co: 0.01 to 0.3%, N: 0.002 to 0.15%, O: 0.010% or less, and Ti:...