US Patent Issued to POSCO on Nov. 25 for "Ultra-thick structural steel having excellent brittle crack initiation resistance, and manufacturing method therefor" (South Korean Inventor)

ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,171, issued on Nov. 25, was assigned to POSCO Co. LTD (Pohang-si, South Korea).

"Ultra-thick structural steel having excellent brittle crack initiation resistance, and manufacturing method therefor" was invented by Hak-Cheol Lee (Pohang-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "One embodiment of the present invention provides an ultra-thick structural steel having excellent brittle crack initiation resistance, and a manufacturing method therefor, the ultra-thick structural steel comprising, by wt %, 0.03-0.08% of C, 1.6-2.2% of Mn, 0.6-1.3% of Ni, 0.005-0.03% of Nb, 0.005-0.02% of Ti, 0.1-0.4% of Cu, 100 ppm or less of P, 40 ppm...