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Hot Dip Galvanized Steel Sheet, And Method For Manufacturing Same
Abstract: A hot-dip galvanized steel sheet and a method for manufacturing same are provided. The present invention relates to the manufacture of a high-strength hot-dip galvanized steel sheet with a tensile strength of 980 MPa or higher for use in automotive structural members, wherein the high-strength hot-dip galvanized steel sheet has a hole expansion ratio (HER) of 45% or more, a yield strength (YS) to HER relationship, HER*100/YS, of 5 or more, an elongation (EL) to HER relationship, HER*EL, of 700 or more, and a yield ratio (YS/TS) of 0.80 or more, and has no surface or internal LME cracks at welds.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
29 May 2025
Publication Number
26/2025
Publication Type
INA
Invention Field
METALLURGY
Status
Email
Parent Application
Applicants
POSCO CO., LTD
6261, Donghaean-ro, Nam-gu,
Pohang-si,
Gyeongsangbuk-do 37859
Inventors
1. CHOI, Kang-Hyun
20-26, Pokposarang-gil
Gwangyang-si,
Jeollanam-do 57807
2. AHN, Yeon-Sang
20-26, Pokposarang-gil
Gwangyang-si,
Jeollanam-do 57807
3. HYUN, Cheol-Seung
20-26, Pokposarang-gil
Gwangyang-si,
Jeollanam-do 57807
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 202517051987-STATEMENT OF UNDERTAKING (FORM 3) [29-05-2025(online)].pdf | 2025-05-29 |
| 2 | 202517051987-REQUEST FOR EXAMINATION (FORM-18) [29-05-2025(online)].pdf | 2025-05-29 |
| 3 | 202517051987-PROOF OF RIGHT [29-05-2025(online)].pdf | 2025-05-29 |
| 4 | 202517051987-PRIORITY DOCUMENTS [29-05-2025(online)].pdf | 2025-05-29 |
| 5 | 202517051987-POWER OF AUTHORITY [29-05-2025(online)].pdf | 2025-05-29 |
| 6 | 202517051987-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [29-05-2025(online)].pdf | 2025-05-29 |
| 7 | 202517051987-FORM 18 [29-05-2025(online)].pdf | 2025-05-29 |
| 8 | 202517051987-FORM 1 [29-05-2025(online)].pdf | 2025-05-29 |
| 9 | 202517051987-FIGURE OF ABSTRACT [29-05-2025(online)].pdf | 2025-05-29 |
| 10 | 202517051987-DRAWINGS [29-05-2025(online)].pdf | 2025-05-29 |
| 11 | 202517051987-DECLARATION OF INVENTORSHIP (FORM 5) [29-05-2025(online)].pdf | 2025-05-29 |
| 12 | 202517051987-COMPLETE SPECIFICATION [29-05-2025(online)].pdf | 2025-05-29 |
| 13 | 202517051987-certified copy of translation [13-06-2025(online)].pdf | 2025-06-13 |
| 14 | 202517051987-FORM-26 [21-08-2025(online)].pdf | 2025-08-21 |
| 15 | 202517051987-Others-260825.pdf | 2025-08-27 |
| 16 | 202517051987-GPA-260825.pdf | 2025-08-27 |
| 17 | 202517051987-Correspondence-260825.pdf | 2025-08-27 |
| 18 | 202517051987-FORM 3 [27-10-2025(online)].pdf | 2025-10-27 |