US Patent Issued to JFE Steel on Aug. 26 for "High-strength stainless steel seamless pipe for oil country tubular goods and method for manufacturing same" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,398,436, issued on Aug. 26, 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 comprises, in mass %, C: 0.002 to 0.05%, Si: 0.05 to 0.50%, Mn: 0.04 to 1.80%, P: 0.030% or less, S: 0.002% or less, Cr: more than 14.0% and 17.0% or less, Ni: 4.0 to 8.0%, Mo: 1.5 to 3.0%, Al: 0.005 to 0.10%, V: 0.005 to 0.20%, Co: 0.01 to 1.0%, N: 0.002 to 0.15%, and O: ...