High-strength steel sheet, strength member for vehicles using the same, and method for producing strength member for vehicles
US8263234B2 · kind B2 · utility
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Key dates
| Filing date | Dec 5, 2008 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Feb 9, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12965
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high-strength steel sheet includes a stress-strain diagram obtained by a tensile test of the steel, and a gradient of stress in the stress-strain diagram, wherein the gradient dσ/dε in 3 to 7% of true strain is 5000 MPa or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.