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Steel Sheet And Method For Manufacturing Same

Abstract: A steel sheet and a method for manufacturing same are provided. The steel sheet of the present invention comprises, by weight%, C: 0.03 to 0.18%, Si: 0 to 0.70%, Mn: 0.25 to 1.80%, Al: 0 to 0.70%, P: 0.050% or less, S: 0.0300% or less, N: 0.0300% or less, Ti: 0 to 0.08%, Nb: 0 to 0.06%, V: 0 to 0.07%, Ti+Nb+V: 0.03 to 0.10%, Cr: 0 to 0.80%, Mo: 0 to 0.80%, Cu: 0 to 0.80%, Ni: 0 to 0.80%, B: 0 to 0.0050%, Ca: 0 to 0.050%, REM except for Y: 0 to 0.050%, Mg: 0 to 0.050%, W: 0 to 0.50%, Zr: 0 to 0.50%, Sb: 0 to 0.50%, Sn: 0 to 0.50%, Y: 0 to 0.20%, Hf: 0 to 0.20%, the balance being Fe and inevitable impurities, and includes, by area%, perlite containing cementite: 1 to 15%, the balance being ferrite and unavoidably introduced structures.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
01 July 2025
Publication Number
28/2025
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. LEE, Jae-Hoon
20-26, Pokposarang-gil Gwangyang-si, Jeollanam-do 57807
2. HAN, Seong-Ho
20-26, Pokposarang-gil Gwangyang-si, Jeollanam-do 57807
3. CHOI, Yong-Hoon
20-26, Pokposarang-gil Gwangyang-si, Jeollanam-do 57807

Specification

Documents

Application Documents

# Name Date
1 202517062833-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [01-07-2025(online)].pdf 2025-07-01
2 202517062833-STATEMENT OF UNDERTAKING (FORM 3) [01-07-2025(online)].pdf 2025-07-01
3 202517062833-REQUEST FOR EXAMINATION (FORM-18) [01-07-2025(online)].pdf 2025-07-01
4 202517062833-PROOF OF RIGHT [01-07-2025(online)].pdf 2025-07-01
5 202517062833-PRIORITY DOCUMENTS [01-07-2025(online)].pdf 2025-07-01
6 202517062833-POWER OF AUTHORITY [01-07-2025(online)].pdf 2025-07-01
7 202517062833-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [01-07-2025(online)].pdf 2025-07-01
8 202517062833-FORM 18 [01-07-2025(online)].pdf 2025-07-01
9 202517062833-FORM 1 [01-07-2025(online)].pdf 2025-07-01
10 202517062833-FIGURE OF ABSTRACT [01-07-2025(online)].pdf 2025-07-01
11 202517062833-DECLARATION OF INVENTORSHIP (FORM 5) [01-07-2025(online)].pdf 2025-07-01
12 202517062833-COMPLETE SPECIFICATION [01-07-2025(online)].pdf 2025-07-01
13 202517062833-FORM-26 [30-09-2025(online)].pdf 2025-09-30