MUMBAI, India, Aug. 10 -- Intellectual Property India has published a patent application (202617073999 A) filed by Jfe Steel Corporation on June 15, 2026, for Hot-Rolled Steel Sheet And Method For Producing Same.
Inventors include Matsui Yoichiro; Jin Takayoshi; Matsumoto Kazuki; and Kimura Hideyuki.
The application for the patent was published on July 31, 2026, under issue no. 31/2026.
Abstract: The purpose of the present invention is to provide: a hot-rolled steel sheet with excellent uniformity in scale adhesion and blackness in the width direction of a hot- rolled coil; and a method for producing the hot-rolled steel sheet. The hot-rolled steel sheet has a predetermined chemical composition and has mill scale on the surface thereof. The mill scale in the width direction of the steel sheet has a composition comprising, in terms of area ratio: 30% or more of magnetite particles; 20-60% of an eutectoid transformation structure of iron and magnetite, the magnetite is composed of the magnetite particles and magnetite included in the eutectoid transformation structure; 20% or less of wustite; and, in terms of mass fraction, 5% or less hematite. The area ratio of the precipitated Fe on the surface of the mill scale is 15% or less, and the average thickness of the mill scale in the width direction of the steel sheet is 3-20 µm.
Disclaimer: Curated by HT Syndication.
