High-strength steel sheet for containers and method for producing the same
US10415111B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2015 |
| Grant date | Sep 17, 2019 |
| Priority date | — |
| Expiry date | Nov 3, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21B2001/225
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided are a high-strength steel sheet for containers and a method for producing the high-strength steel sheet. The high-strength steel sheet for containers has a composition containing, by mass, C: 0.0010% to 0.10%, Si: 0.04% or less, Mn: 0.10% to 0.80%, P: 0.007% to 0.100%, S: 0.10% or less, Al: 0.001% to 0.100%, N: 0.0010% to 0.0250%, and the balance being Fe and inevitable impurities. The difference between the dislocation density at the uppermost layer of the high-strength steel sheet in the thickness direction and the dislocation density at a depth of ¼ of the thickness of the high-strength steel sheet from the surface is 1.94×1014 m−2 or less. The high-strength steel sheet has a tensile strength of 400 MPa or more and a fracture elongation of 10% or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.