Hot Rolled Steel Sheet

Abstract: The present invention provides a hot-rolled steel sheet having excellent productivity and excellent cold rolling properties. This hot-rolled steel sheet has a prescribed chemical composition in which the carbon content is 0.20-0.70 mass%. The metal structure at a depth position of 1/4 of the sheet thickness comprises at least 20% by area of ferrite, at least 40% by area of pearlite, and 0-10% by area of the remainder composition. Ferrite crystal grains measured by electron backscatter diffraction satisfy a prescribed relationship.

Patent Information

Application #

Filing Date

29 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	202517051780-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [29-05-2025(online)].pdf	2025-05-29
2	202517051780-STATEMENT OF UNDERTAKING (FORM 3) [29-05-2025(online)].pdf	2025-05-29
3	202517051780-REQUEST FOR EXAMINATION (FORM-18) [29-05-2025(online)].pdf	2025-05-29
4	202517051780-PROOF OF RIGHT [29-05-2025(online)].pdf	2025-05-29
5	202517051780-PRIORITY DOCUMENTS [29-05-2025(online)].pdf	2025-05-29
6	202517051780-POWER OF AUTHORITY [29-05-2025(online)].pdf	2025-05-29
7	202517051780-FORM 18 [29-05-2025(online)].pdf	2025-05-29
8	202517051780-FORM 1 [29-05-2025(online)].pdf	2025-05-29
9	202517051780-DECLARATION OF INVENTORSHIP (FORM 5) [29-05-2025(online)].pdf	2025-05-29
10	202517051780-COMPLETE SPECIFICATION [29-05-2025(online)].pdf	2025-05-29
11	202517051780-FORM-26 [22-07-2025(online)].pdf	2025-07-22
12	202517051780-FORM 3 [23-10-2025(online)].pdf	2025-10-23