Hot Rolled Steel Sheet

Abstract: The present invention provides a hot-rolled steel sheet which exhibits excellent cold rolling performance. This hot-rolled steel sheet has a prescribed chemical composition in which the carbon content is 0.02 mass% to less than 0.20 mass%. The metal structure at a depth position of 1/4 of the sheet thickness comprises at least 30% by area of ferrite, at least 10% by area of pearlite, and 0-60% by area of the remainder composition. Ferrite crystal grains measured by electron backscatter diffraction satisfy a prescribed relationship.

Patent Information

Application #

Filing Date

27 May 2025

Publication Number

28/2025

Publication Type

INA

Invention Field

METALLURGY

Status

Email

Parent Application

Applicants

NIPPON STEEL CORPORATION

6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Inventors

1. OGISU Yasuyuki

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

2. TOYODA Takeshi

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

#	Name	Date
1	202517050789-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [27-05-2025(online)].pdf	2025-05-27
2	202517050789-STATEMENT OF UNDERTAKING (FORM 3) [27-05-2025(online)].pdf	2025-05-27
3	202517050789-REQUEST FOR EXAMINATION (FORM-18) [27-05-2025(online)].pdf	2025-05-27
4	202517050789-PROOF OF RIGHT [27-05-2025(online)].pdf	2025-05-27
5	202517050789-PRIORITY DOCUMENTS [27-05-2025(online)].pdf	2025-05-27
6	202517050789-POWER OF AUTHORITY [27-05-2025(online)].pdf	2025-05-27
7	202517050789-FORM 18 [27-05-2025(online)].pdf	2025-05-27
8	202517050789-FORM 1 [27-05-2025(online)].pdf	2025-05-27
9	202517050789-DECLARATION OF INVENTORSHIP (FORM 5) [27-05-2025(online)].pdf	2025-05-27
10	202517050789-COMPLETE SPECIFICATION [27-05-2025(online)].pdf	2025-05-27
11	202517050789-FORM 3 [23-10-2025(online)].pdf	2025-10-23