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Plated Steel Sheet

Abstract: The present invention relates to a plated steel sheet which has high LME resistance. A plated steel sheet according to the present invention is characterized in that: the tensile strength thereof is 780 MPa or more; a specific chemical component is contained therein; the plating layer contains Zn; the depth, at which the C concentration as measured by GDS is 0.05% or less, from the interface between the steel sheet and the plating layer in the thickness direction of the steel sheet is 8 µm or more; the thickness of the layer, in which the area ratio of the ferrite phase is 90% or more, in the thickness direction of the steel sheet from the interface between the steel sheet and the plating layer is 8 µm or more; and the solid solution amount of Si metal and Al metal in the ferrite phase is 0.3% or more in total at the position of 4 µm from the interface between the steel sheet and the plating layer in the thickness direction of the steel sheet.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
16 October 2025
Publication Number
49/2025
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. MITSUNOBU, Takuya
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
2. KIREKAWA, Naoto
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
3. URANAKA, Masaaki
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
4. TAKEBAYASHI, Hiroshi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

# Name Date
1 202517100207-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [16-10-2025(online)].pdf 2025-10-16
2 202517100207-STATEMENT OF UNDERTAKING (FORM 3) [16-10-2025(online)].pdf 2025-10-16
3 202517100207-REQUEST FOR EXAMINATION (FORM-18) [16-10-2025(online)].pdf 2025-10-16
4 202517100207-PROOF OF RIGHT [16-10-2025(online)].pdf 2025-10-16
5 202517100207-PRIORITY DOCUMENTS [16-10-2025(online)].pdf 2025-10-16
6 202517100207-POWER OF AUTHORITY [16-10-2025(online)].pdf 2025-10-16
7 202517100207-FORM 18 [16-10-2025(online)].pdf 2025-10-16
8 202517100207-FORM 1 [16-10-2025(online)].pdf 2025-10-16
9 202517100207-DRAWINGS [16-10-2025(online)].pdf 2025-10-16
10 202517100207-DECLARATION OF INVENTORSHIP (FORM 5) [16-10-2025(online)].pdf 2025-10-16
11 202517100207-COMPLETE SPECIFICATION [16-10-2025(online)].pdf 2025-10-16