Sheath heater
US4950873A · kind A · utility
5Cited by
2References
16Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 6, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Mar 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49083
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A corrosion-resistant steel tube such as a sheath heater steel tube and boiler tube which exhibit improved resistance to dry corrosion under high temperature dry-corrosive conditions in the presence of chlorides is disclosed. The steel consists essentially of, in % by weight: ______________________________________ C: not more than 0.05%, Si: 0.1-2.0%, Mn: not more than 2.0%, Cr: 18-26%, Ni: 16-30%, ______________________________________ at least one of Mo: 0.5-4.0%, W: 0.01-4.00%, and PA1 V: 0.01-4.00%, PA1 N: 0-0.25%, PA1 (Ti+Nb): 0-1.5%, and the balance iron and incidental impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.