Sheath heater
US4742324A · kind A · utility
12Cited by
3References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | May 20, 1987 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | May 20, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S148/909
- 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: PA0 C: not more than 0.05%, PA0 Si: 0.1-2.0%, Mn: not more than 2.0%, PA0 Cr: 18-26%, Ni: 16-30%, at least one of Mo: 0.5-4.0%, W: 0.01-4.00%, and PA0 V: 0.01-4.00%, PA0 N: 0-0.25%, PA0 (Ti+Nb): 0-1.5%, and the balance iron and incidental impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.