Title: Corrosion resistant Bourdon tube

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.

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Inventors: Conti, Jack (Norwalk, CT, US)

Application Number: 570523
Filing Date: 1975-04-21
Publication_date: 1976-08-24
Assignee: Dresser Industries, Inc. (Dallas, TX)
Primary Class(es): 73/732
Other Classes:
US Patent Ref:

2174171	Sep, 1939	Wasson	73/418.
3723098	Mar, 1973	Hunt	75/12.
3723101	Mar, 1973	Hunt	75/49.

Other Refs:
Primary Examiner: Swisher, S. Clement
Assistant Examiner: Corr, Denis E.
Attorney: Rubin; Daniel