High Cr steel pipe for line pipe
US6464802B1 · kind B1 · utility
4Cited by
0References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 2000 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Oct 2, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21D8/105
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high-Cr steel pipe for line pipes having further improved HAZ toughness and hot workability is provided by limiting the composition to:C: 0.02% or less, Si: 0.5% or less, Mn: 0.2 to 3.0%, Cr: 10.0 to 14.0%, Ni: more than 2.0 to 3.0%, N: 0.02% or less, preferably Nb: 0.3% or less, and the balance being Fe and incidental impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.