US Patent Issued to POSCO on Aug. 5 for "Wire rod and steel wire for spring, having enhanced toughness and corrosion fatigue properties, and respective manufacturing methods therefor" (South Korean Inventor)

ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,628, issued on Aug. 5, was assigned to POSCO Co. LTD (Pohang-si, South Korea).

"Wire rod and steel wire for spring, having enhanced toughness and corrosion fatigue properties, and respective manufacturing methods therefor" was invented by Kwan Ho Kim (Pohang-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A wire rod for springs with improved toughness and corrosion fatigue properties is disclosed. The disclosed wire rod comprises by weight percent, carbon (C): 0.4 to 0.7%, silicon (Si): 1.2 to 2.3%, manganese (Mn): 0.2 to 0.8%, chromium (Cr): 0.2 to 0.8%, and a balance of Fe and inevitable impurities, and a grain size is 13.2 micro met...