MUMBAI, India, June 24 -- Intellectual Property India has published a patent application (202617063170 A) filed by Baoshan Iron & Steel Co. , Ltd. on May 19, 2026, for Hot-Rolled High-Strength Steel Having Good Hole-Expansion And Bending Performance, And Manufacturing Method Therefor.
Inventors include Liu, Chunsu; Zhu, Defeng; Wang, Jintao; Jin, Xinyan; and Zhang, Yulong.
The application for the patent was published on June 12, 2026, under issue no. 24/2026.
Abstract: Disclosed in the present invention is hot-rolled high-strength steel having good hole-expansion and bending performance. The hot-rolled high-strength steel contains Fe and inevitable impurities, and further contains the following chemical elements in percentages by mass: C: 0.030-0.080%, Si: 0.01-1.20%, Mn: 1.20-1.80%, S: 0.0005- 0.0080%, Al: 0.02-1.00%, and B=0.0035%; at least one of Mg: 0.0002-0.0100% and Ca: 0.0002-0.0100%; at least one of 0Ti=0.13%, 0Nb=0.06% and 0V=0.20%; and at least one of 0Cr=0.7% and 0Mo=0.25%. The grain boundary density of a microscopic structure of the hot-rolled high-strength steel is 0.6-2.0 µm-1. Correspondingly, further provided in the present invention is a manufacturing method for the hot-rolled high-strength steel.
Disclaimer: Curated by HT Syndication.
