Fin stock material

摘要

A fin stock material from an 3xxx-series aluminum alloy and including at least 0.5% to 2.0% Mn, and furthermore a purposive addition of one or more wetting elements selected from the group of: Bi 0.03% to 0.5%, Pb 0.03% to 0.5%, Sb 0.03% to 0.5%, Li 0.03% to 0.5%, Se 0.03% to 0.5%, Y 0.03% to 0.05%, Th 0.03% to 0.05%, and the sum of these elements being 0.5% or less, with the remainder including aluminum and tolerable impurities. Also provided is a method for manufacturing a heat exchanger assembly incorporating such a fin stock material.

主权项

1. A brazed assembly comprising a plurality of substantially parallel fluid-carrying tubes and a plurality of fins; said fins being in thermal communication with said plurality of fluid-carrying tubes and structured to transfer heat away therefrom, said plurality of fins consisting of a fin stock material from an 3xxx-series aluminium alloy and comprising by weight
Mn 0.5 to 2.0% Si 0.5% to 1.5% Fe 0 to 1.8% Zn 0 to 2.5% Mg 0 to 0.5% Cu 0 to 0.4%, and furthermore a purposive addition of Bi 0.03% to 0.5% as wetting agent, with the remainder comprising aluminium and tolerable impurities, wherein said fin stock material does not have any additional metallic layers such that the wetting agent is diffused to the outer surface of the fin stock material when the fin stock material is brazed; and wherein the fin stock material at final gauge has a thickness of 0.05 to 0.15 mm.