公开(公告)号：US20240018617A1

公开(公告)日：2024-01-18

申请号：US18034616

申请日：2021-02-02

Applicant: NIPPON STEEL CORPORATION

Inventor： Jun MAKI ,  Masaharu FUKUI

IPC: C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C21D8/02

CPC classification number: C21D9/46 ,  C22C38/02 ,  C21D8/0226 ,  C22C38/06 ,  C22C38/04

Abstract: A thin steel sheet having a chemical composition satisfying 0.0001≤[Sn]+0.3[Cu]+0.1[Cr]≤0.2000 ([Sn], [Cu], and [Cr] respectively being the contents (mass %) of Sn, Cu, and Cr), having an oxide film of a thickness of 50 nm or less on the surface, and satisfying A/C