Organic Coated Steel Sheet

Abstract: The present invention provides a high-strength steel sheet in which hydrogen embrittlement cracking is less likely to occur. An organic coated steel sheet (1) according to the present invention has: a steel sheet (2) which has a tensile strength of 980 MPa or more; and an organic coating layer (3) which is disposed on at least a part of the surface of the steel sheet. This organic coated steel sheet (1) is characterized in that the organic coating layer (3) contains a nitrite salt as a nitrite radical in an amount of 1-30% by mass and 0.05 g/m2 or more.

Patent Information

Application #

Filing Date

27 August 2025

Publication Number

49/2025

Publication Type

INA

Invention Field

MECHANICAL ENGINEERING

Status

Email

Parent Application

Applicants

NIPPON STEEL CORPORATION

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

Inventors

1. AKAHOSHI, Makoto

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

2. TAKAHASHI, Takehiro

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

Specification

Documents

Application Documents

#	Name	Date
1	202517081151-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [27-08-2025(online)].pdf	2025-08-27
2	202517081151-STATEMENT OF UNDERTAKING (FORM 3) [27-08-2025(online)].pdf	2025-08-27
3	202517081151-REQUEST FOR EXAMINATION (FORM-18) [27-08-2025(online)].pdf	2025-08-27
4	202517081151-PROOF OF RIGHT [27-08-2025(online)].pdf	2025-08-27
5	202517081151-PRIORITY DOCUMENTS [27-08-2025(online)].pdf	2025-08-27
6	202517081151-POWER OF AUTHORITY [27-08-2025(online)].pdf	2025-08-27
7	202517081151-FORM 18 [27-08-2025(online)].pdf	2025-08-27
8	202517081151-FORM 1 [27-08-2025(online)].pdf	2025-08-27
9	202517081151-DRAWINGS [27-08-2025(online)].pdf	2025-08-27
10	202517081151-DECLARATION OF INVENTORSHIP (FORM 5) [27-08-2025(online)].pdf	2025-08-27
11	202517081151-COMPLETE SPECIFICATION [27-08-2025(online)].pdf	2025-08-27
12	202517081151-FORM 3 [18-12-2025(online)].pdf	2025-12-18