MUMBAI, India, Nov. 2 -- Intellectual Property India has published a patent application (202617094278 A) filed by Jfe Steel Corporation on August 04, 2026, for High-Strength Alloyed Hot-Dip Galvanized Steel Sheet And Method For Producing Same.
Inventors include Tahara Daisuke; Hoshino Katsuya; Maeda Satoshi; Morimoto Ryohei; and Kawasaki Yoshiyasu.
The application for the patent was published on October 30, 2026, under issue no. 44/2026.
Abstract: Provided are: an alloyed hot-dip galvanized steel sheet which has a tensile strength of 780 MPa or more and has excellent releasability of diffusible hydrogen; and a method for producing the same. The present invention specifically provides a high-strength alloyed hot-dip galvanized steel sheet which comprises an alloyed hot-dip galvanization layer that has a plating adhesion amount per one surface of 20 g/m2 to 120 g/m2 on a steel sheet that comprises a predetermined component composition, wherein: the oxygen content in a steel sheet surface layer part that is immediately below the galvanization layer and within 100 µm from the surface of a base steel sheet in the plate thickness center direction is less than 0.030 g/m2 per one surface; and, with regard to a surface that is parallel to the plate surface of the steel sheet at a depth of M (µm) (1 = M = 5) from the surface of the galvanization layer, the number of intersection points of cracks in the galvanization layer is 500 points/mm2 or more, the amount of diffusible hydrogen in the steel is 0.30 mass ppm or less, and the tensile strength is 780 MPa or more.
Disclaimer: Curated by HT Syndication.
