Steel sheet for crown cap, method for manufacturing steel sheet for crown cap, and crown cap
US10655199B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 2016 |
| Grant date | May 19, 2020 |
| Priority date | — |
| Expiry date | Aug 24, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D41/12
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided are a steel sheet, having sufficient strength and formability regardless of reduction of thickness, for crown caps; a method for manufacturing the same; and a crown cap. The steel sheet for crown caps has a composition containing C: 0.0010% to less than 0.0050%, Si: 0.10% or less, Mn: 0.05% to less than 0.50%, P: 0.050% or less, S: 0.050% or less, Al: more than 0.002% to less than 0.070%, N: less than 0.0040%, and B: 0.0005% to 0.0020% on a mass basis, the balance being Fe and inevitable impurities, and also has a yield strength of 500 MPa or more in a rolling direction, an average Lankford value (r) of 1.1 or more, and an in-plane anisotropy (Δr) of Lankford value of −0.3 to 0.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.