UOE steel pipe excellent in collapse strength and method of production thereof
US7967926B2 · kind B2 · utility
2Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 30, 2009 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Jul 30, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/18
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention relates to UOE steel pipe excellent in collapse characteristics formed by the UOE production method and a method for forming this UOE steel pipe, said UOE steel pipe characterized in that a ratio between compression and tension of yield strength in the circumferential direction is at least 1.05 near the inside surface and is at least 0.9 to not more to 1.0 from the center of plate thickness to the outside surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.