US Patent Issued to NANJING IRON & STEEL on Feb. 24 for "690 MPa-grade medium manganese steel medium thick steel with high strength and low yield ratio and manufacturing method therefor" (Chinese Inventors)

ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,559,825, issued on Feb. 24, was assigned to NANJING IRON & STEEL Co. LTD. (Nanjing, China).

"690 MPa-grade medium manganese steel medium thick steel with high strength and low yield ratio and manufacturing method therefor" was invented by DongMing Duan (Nanjing, China), Chao Sun (Nanjing, China), YanTang Chen (Nanjing, China), YuWe Zhou (Nanjing, China), CongDao Wang (Nanjing, China) and Ming Li (Nanjing, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A manganese steel consisting essentially of the following chemical composition in mass percentages: C: 0.05%-0.10%, Mn: 4.1%-4.7%, Si: 0.15%-0.4%, Pless than equal to0.010%, Sless than equal to0.003%...