Electric heating – Metal heating – By arc
Patent
1982-09-15
1985-06-25
Envall, Jr., Roy N.
Electric heating
Metal heating
By arc
219 602, B23K 923
Patent
active
045256209
ABSTRACT:
A method of welding ferritic stainless steel to austenitic stainless steel to form a corrosion-resistant welded article having a stabilized weld joint is provided. The ferritic steel contains 17 to 35% chromium and a total carbon and nitrogen less than the total carbon and nitrogen of the austenitic steel containing 16 to 29% chromium. The weld is stabilized with up to 4% stabilizer selected from the group consisting of titanium and columbium, and at least 0.5% stabilizer when the weld deposit contains at least about 22% chromium or at least 30% total of chromium and three times the molybdenum content, and at least 0.8% stabilizer for less than about 22% chromium or less than about 30% total of chromium and three times the molybdenum content. The source of the stabilizer may be the ferritic steel or austenitic steel or a weld filler metal.
A corrosion-resistant welded article produced by the method is also provided, such as a ferritic stainless steel tube and austenitic stainless steel tubesheet.
REFERENCES:
patent: 2862102 (1958-11-01), Heuschkel
Lowrie, R., "Welding E-Brite 26-1 to Other Alloys", Welding Journal, Nov. 1973.
Beigay Jack M.
Deverell Harry E.
Allegheny Ludlum Steel Corporation
Envall Jr. Roy N.
Keve Alfred S.
Viccaro Patrick J.
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