Steel sheet for crown cap, crown cap and method for producing steel sheet for crown cap
US11459149B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2018 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Jul 30, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/005
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A steel sheet for crown cap having excellent formability from which a crown cap having an excellent pressure resistance can be produced without an expensive soft liner even if the steel sheet is subjected to sheet metal thinning, the steel sheet having: a chemical composition containing, in mass %, C: more than 0.006% and 0.012% or less, Si: 0.02% or less, Mn: 0.10% or more and 0.60% or less, P: 0.020% or less, S: 0.020% or less, Al: 0.01% or more and 0.07% or less, and N: 0.0080% or more and 0.0200% or less, with the balance being Fe and inevitable impurities; and a percentage of a region of more than 0% and less than 20% at a position of ½ of a sheet thickness, the region having a dislocation density of 1×1014 m−2 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.