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:
Aug. 26, 2025
Filed:
Jan. 26, 2021
Aleris Rolled Products Germany Gmbh, Koblenz, DE;
Bernd Jacoby, Limburg, DE;
Fabian Ritz, Ötzingen, DE;
Arne Schlegel, Aachen, DE;
Steven Kirkham, Ransbach-Baumbach, DE;
Axel Alexander Maria Smeyers, Heist op den Berg, BE;
NOVELIS KOBLENZ GMBH, Koblenz, DE;
Abstract
An aluminium alloy multi-layered brazing sheet product for brazing in an inert-gas atmosphere without a flux includes a core layer made of a 3xxx alloy including 0.20-0.75 wt. % Mg, and provided with a covering clad layer including 2-5 wt. % Si on one or both sides of said 3xxx alloy core layer and a Al—Si brazing clad layer including 7-13 wt. % Si positioned between the 3xxx alloy core layer and the covering clad layer. The covering clad layer has a thickness Xand the Al—Si brazing clad layer has a thickness Xand wherein X≥2X. The aluminium alloy multi-layered brazing sheet product can be used in a fluxfree controlled atmosphere brazing (CAB) operation to produce a heat exchanger apparatus.