High strength steel sheet and method for manufacturing the same
US9121087B2 · kind B2 · utility
21Cited by
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17Claims
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Key dates
| Filing date | Sep 4, 2009 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | May 26, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D2211/008
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high-strength steel sheet has good ductility and stretch-flangeability and has a tensile strength (TS) of 980 MPa or more. The steel sheet contains 0.17%-0.73% C, 3.0% or less Si, 0.5%-3.0% Mn, 0.1% or less P, 0.07% or less S, 3.0% or less Al, and 0.010% or less N, in which Si+Al is 0.7% or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.