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:
Jul. 21, 2009
Filed:
May. 05, 2004
Kent K. Coleman, Concord, NC (US);
David Wayne Gandy, Concord, NC (US);
Ramaswamy Viswanathan, Saratoga, CA (US);
William F. Newell, Jr., Mooresville, NC (US);
Kent K. Coleman, Concord, NC (US);
David Wayne Gandy, Concord, NC (US);
Ramaswamy Viswanathan, Saratoga, CA (US);
William F. Newell, Jr., Mooresville, NC (US);
Electric Power Research Institute, Palo Alto, CA (US);
Abstract
Accordingly, the present invention provides a weld filler composition for joining different alloy steel pieces with substantially different chromium content, such as joining low alloy ferritic steel to high alloy ferritic steel, low alloy ferritic steel to austenitic stainless steel, or high alloy ferritic steel to austenitic stainless steel, and a method using the same. In one embodiment, the present invention provides a composition for a weld filler comprising nickel, iron, and chromium, which collectively comprise at least 50% by weight of the weld filler; niobium, carbon, manganese, molybdenum, and silicon, which collectively comprise no more than 50% by weight of the weld filler, and a niobium to carbon ratio of approximately 20 or less.