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Hot Rolled Steel Sheet

Abstract: Provided is a hot rolled steel sheet that has a prescribed chemical composition and contains 80 to 98% of at least one of a ferrite and a bainite in total and 2 to10% of a martensite in terms of areal percentage and that has a metallic structure, wherein: given that a boundary having an orientation difference of 15º or more is defined as a grain boundary and a region that is surrounded by the grain boundary and has a circle-equivalent diameter of 0. 3µm or more is defined as a crystal grain, the proportion of crystal grains having an in-grain orientation difference of 5-14º is 10 to 60% in terms of areal percentage; the average pole density in the {110}<111> and {112}<111> orientations in a region from the surface to the 1/6-sheet thickness position is 2.50 or more; and the average pole density in the {100}<011>, {211}<011> , and {332}<113> orientations in a region from the 2/5-sheet thickness position to the 3/5-sheet thickness position is 7.00 or less.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
17 April 2025
Publication Number
19/2025
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. YOSHITAKE, Mutsumi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
2. SHUTO, Hiroshi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
3. ITO, Daisuke
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
4. ANDO, Jun
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
5. NAGAI, Kensuke
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

# Name Date
1 202517037154-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [17-04-2025(online)].pdf 2025-04-17
2 202517037154-STATEMENT OF UNDERTAKING (FORM 3) [17-04-2025(online)].pdf 2025-04-17
3 202517037154-REQUEST FOR EXAMINATION (FORM-18) [17-04-2025(online)].pdf 2025-04-17
4 202517037154-PROOF OF RIGHT [17-04-2025(online)].pdf 2025-04-17
5 202517037154-PRIORITY DOCUMENTS [17-04-2025(online)].pdf 2025-04-17
6 202517037154-POWER OF AUTHORITY [17-04-2025(online)].pdf 2025-04-17
7 202517037154-FORM 18 [17-04-2025(online)].pdf 2025-04-17
8 202517037154-FORM 1 [17-04-2025(online)].pdf 2025-04-17
9 202517037154-DRAWINGS [17-04-2025(online)].pdf 2025-04-17
10 202517037154-DECLARATION OF INVENTORSHIP (FORM 5) [17-04-2025(online)].pdf 2025-04-17
11 202517037154-COMPLETE SPECIFICATION [17-04-2025(online)].pdf 2025-04-17
12 202517037154-FORM 3 [18-08-2025(online)].pdf 2025-08-18