Patent ID: 6391129
Filing Date: 2002-05-21
Classification: B23K,C22C,F28F

Abstract:
A method of use comprising, applying brazing flux to a member comprising an aluminium extrusion alloy of composition in weight %:Mn1.0-1.4Cu0.2-2.0Mg0.1-0.6Si0.15-1.0â€‚Feâ€‚0.8 max.Zn0.25 max.Ti0.15 max.Cr0.35 max.Zr and/or V in total 0.25 max. other impurities at most 0.05 each, total other impurities at most 0.15 balance aluminium, and with the provision that (Cu+Mg)>0.7; in a Controlled Atmosphere Brazing (CAB) process, wherein the aluminum extrusion alloy is part of an extruded section, and further comprising ageing the extruded section such that the extruded section has a 0.2% yield strength of at least 270 MPa.