The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 2025
Filed:
Dec. 17, 2020
Applicant:
Posco, Pohang-si, KR;
Inventors:
Jai-Ik Kim, Pohang-si, KR;
Hyun-Seok Ko, Pohang-si, KR;
Assignee:
POSCO, Pohang-si, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 38/04 (2006.01); B21B 1/24 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01);
U.S. Cl.
CPC ...
C22C 38/04 (2013.01); B21B 1/24 (2013.01); C21D 8/0226 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01);
Abstract
Described herein is an enamel steel sheet comprising by wt %, 0.01 to 0.05% of C, 0.46 to 0.80% of Mn, 0.001 to 0.03% of Si, 0.01 to 0.08% of Al, 0.001 to 0.02% of P, 0.001 to 0.02% of S, 0.004% or less (excluding 0%) of N, 0.003% or less (excluding 0%) of O, and the balance of Fe and inevitable impurities. The enamel steel sheet may include an oxide layer from the surface to the inner direction thereof, wherein the oxide layer has a thickness of 0.006 to 0.003 μm.