ALUMINUM ALLOY FOR HEAT EXCHANGER FIN MATERIAL EXCELLENT IN THERMAL CONDUCTIVITY AFTER BRAZED AND SACRIFICIAL ANODE EFFECT

摘要

PURPOSE:To manufacture the Al alloy for a heat exchanger fin material having high thermal conductivity after brazed and excellent in sacrificial anode effect by preparing an Al alloy contg. specified ratios of Fe, Si, Mn, Zr and Zn. CONSTITUTION:An Al alloy contg., by weight, 0.2 to 1.8% Fe, 0.2 to 0.6% Si, 0.1 to 0.35% Mn, 0.05 to 0.20% Zr and 0.5 to 2.0% Zn, furthermore contg., at need, =0.3% Cu and the balance Al with inevitable impurities is prepd. In this way, the fin material excellent in high temp. buckling resistance and strength and capable of thinning can be obtd., by which the lightening in weight and the reduction of cost in a heat exchanger can be executed.