US Patent Issued to POSCO on Oct. 7 for "Thick composite-phase steel having excellent durability and manufacturing method therefor" (South Korean Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,400, issued on Oct. 7, was assigned to POSCO (Pohang-si, South Korea).

"Thick composite-phase steel having excellent durability and manufacturing method therefor" was invented by Hyun-Taek Na (Gwangyang-si, South Korea) and Sung-Il Kim (Gwangyang-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided are thick hot-rolled composite-phase steel having excellent durability and a manufacturing method therefor. The thick composite-phase steel having excellent durability according to the present invention comprises, by wt %, C: 0.05 to 0.15%, Si: 0.01 to 1.0%, Mn: 1.0 to 2.3%, Al: 0.01 to 0.1%, Cr: 0.005 to 1.0%, P: 0.001 to 0.05%, S: 0.00...