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:
Jan. 20, 2026
Filed:
Dec. 30, 2020
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Hanlong Zhang, Shanghai, CN;
Yiqiang Sun, Shanghai, CN;
Xinping Mao, Shanghai, CN;
Cheng Wang, Shanghai, CN;
Yulong Zhang, Shanghai, CN;
Xinyan Jin, Shanghai, CN;
Shuize Wang, Shanghai, CN;
Li Wang, Shanghai, CN;
BAOSHAN IRON & STEEL CO., LTD., Shanghai, CN;
Abstract
Disclosed are a low-silicon and low-carbon equivalent GPa grade multi-phase steel plate/steel strip and a manufacturing method therefor. The steel plate/steel strip comprises the following components in percentages by weight: 0.03-0.07% of C, 0.1-0.5% of Si, 1.7-2.0% of Mn, P≤0.02%, S≤0.01%, N≤0.01%, 0.01-0.05% of Al, 0.4-0.7% of Cr, 0.001-0.005% of B, and 0.07-0.15% of Ti, and also comprises one or both of 0.15-0.4% of Mo or 0.02-0.08% of Nb, with the balance being Fe and other inevitable impurities; and at the same time, the steel plate/steel strip satisfies: the content of available B*≥0.001, the content of available B*=B-[Ti-3.4N-1.2(C-Nb/7.8)]/22, CE<0.58, and CE=C+Mn/6+(Cr+Mo+V)/5+(Si+Ni+Cu)/15. The steel plate has a tensile strength of ≥980 MPa and a yield strength of ≥780 MPa, and a hole expansion rate of >50% if an original hole is a punched hole or a hole expansion rate of >60% if the original hole is a reamed hole.