Low-yield ratio high-strength electric resistance welded steel pipe, steel strip for electric resistance welded steel pipes, and methods of manufacturing them
US9765417B2 · kind B2 · utility
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Key dates
| Filing date | Apr 9, 2012 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Dec 2, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/13
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A low-yield ratio high-strength electric resistance welded steel pipe has a yield ratio of 80% or less and a TS of 655 MPa or more. A steel material has a composition containing 0.38% to 0.45% C, 0.1% to 0.3% Si, 1.0% to 1.8% Mn, 0.03% or less P, 0.03% or less S, 0.01% to 0.07% sol. Al, and 0.01% or less N on a mass basis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.