Patent ID: 6371201
Filing Date: 2002-04-16
Classification: B23K,B32B,F28F,Y10T

Abstract:
A heat exchanger assembly for an automotive vehicle comprising:at least one tube having an internal surface and an external surface; and a composition cladding having at least magnesium applied to said internal surface and said external surface of said at least one tube; said at least one tube comprising an aluminum based material selected from the Aluminum Association 3Ã—Ã—Ã—, 5Ã—Ã—Ã— and 6Ã—Ã—Ã— series aluminum alloys; and said composition cladding comprising lithium (Li) within a range from about 0.01% to about 0.3%, magnesium (Mg) within a range from about 0.2% to about 0.7%, sodium (Na) within a range from about 0.01% to about 0.1%, silicon (Si) within a range from about 4% to 13%, manganese (Mn) within a range from about 0% to about 1%, copper (Cu) within a range from about 0.01% to about 0.1%, zinc (Zn) within a range from about 0% to about 0.3%, beryllium (Be) within a range from about 0.01% to about 0.7%, other impurities not exceeding a total of 1%, balance aluminum; and at least one component disposed adjacent said composition cladding, said at least one tube and said at least one component being joined together by fluxless brazing with said composition cladding using a controlled atmosphere brazing process.