US Patent Issued to BAOSHAN IRON & STEEL on July 8 for "Cold-rolling strip steel with strength and hardness thereof varying in thickness direction and manufacturing method therefor" (Chinese Inventors)

ALEXANDRIA, Va., July 9 -- United States Patent no. 12,351,887, issued on July 8, was assigned to BAOSHAN IRON & STEEL Co. LTD. (Shanghai).

"Cold-rolling strip steel with strength and hardness thereof varying in thickness direction and manufacturing method therefor" was invented by Xiaodong Zhu (Shanghai), Peng Xue (Shanghai) and Wei Li (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a cold-rolled strip steel with varying strength/hardness in a thickness direction, comprising chemical elements in the following mass percentages: C 0.06-0.3 wt %, Si 0.01-2.5 wt %, Mn 0.5-3 wt %, Al 0.02-0.08 wt % and a balance of Fe and other unavoidable impurities, wherein the cold-rolled strip steel wit...