Plated Steel Sheet

Abstract: The present invention provides a plated steel sheet that by having a new configuration exhibits excellent strength and elongation and that has a further improved post molding appearance.???A plated steel sheet according to the present invention comprises a base steel sheet and a plating layer provided on the surface of the base steel sheet. The plated steel sheet is characterized in that the base steel sheet has a specific chemical composition the metal structure of the base steel sheet is formed of in area% 80 97% of ferrite and 3 20% of a hard phase the area ratio of a band like hard phase at a position from 3t/8 to 5t/8 in relation to the sheet thickness t is 0 5% the absolute value of the difference in the hard phase fraction between a position from 1t/8 to 4t/8 and a position from 4t/8 to 7t/8 in relation to the sheet thickness t from the surface of the base steel sheet is 0 8% and the surface roughness Sa of the plated steel sheet is 0.10 0.50 ??m.

Patent Information

Application #

Filing Date

10 April 2025

Publication Number

18/2025

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. NAGANO Mai

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

2. HIRONAKA Satoshi

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

3. NAKANO Katsuya

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

4. OSANAI Takumi

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

Specification

Documents

Application Documents

#	Name	Date
1	202517035098-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [10-04-2025(online)].pdf	2025-04-10
2	202517035098-STATEMENT OF UNDERTAKING (FORM 3) [10-04-2025(online)].pdf	2025-04-10
3	202517035098-PROOF OF RIGHT [10-04-2025(online)].pdf	2025-04-10
4	202517035098-PRIORITY DOCUMENTS [10-04-2025(online)].pdf	2025-04-10
5	202517035098-POWER OF AUTHORITY [10-04-2025(online)].pdf	2025-04-10
6	202517035098-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [10-04-2025(online)].pdf	2025-04-10
7	202517035098-FORM 1 [10-04-2025(online)].pdf	2025-04-10
8	202517035098-DRAWINGS [10-04-2025(online)].pdf	2025-04-10
9	202517035098-DECLARATION OF INVENTORSHIP (FORM 5) [10-04-2025(online)].pdf	2025-04-10
10	202517035098-COMPLETE SPECIFICATION [10-04-2025(online)].pdf	2025-04-10
11	202517035098-FORM 18 [14-07-2025(online)].pdf	2025-07-14
12	202517035098-FORM 3 [12-08-2025(online)].pdf	2025-08-12