Corrosion resistant Bourdon tube
US3975967A · kind A · utility
10Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 21, 1975 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Apr 21, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L7/041
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A corrosion resistant Bourdon tube for pressure gauges and the like formed of a vacuum purified ferritic stainless steel containing by weight about 26 percent chromium, about 1 percent molybdenum and ultra-low carbon and nitrogen content on the order of about 0.002 and 0.008 percent, respectively. By virtue of the metallurgical structure of this composition affording good weldability and ductility, a Bourdon tube fabricated therefrom is characterized by substantial immunity to chloride stress cracking, and high resistance to both sulfide damage and pitting corrosion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.