The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 1985
Filed:
Sep. 15, 1982
Harry E Deverell, Natrona Heights, PA (US);
Jack M Beigay, Freeport, PA (US);
Allegheny Ludlum Steel Corporation, Pittsburgh, PA (US);
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.