EXTRUDED TUBE FOR FIN TUBE TYPE HEAT EXCHANGER FOR AIR CONDITIONER AND REFRIGERANT PIPING FOR HEAT EXCHANGE CYCLE

摘要

PROBLEM TO BE SOLVED: To provide an extruded tube made of an aluminum alloy which has excellent strength and corrosion resistance as the tube of a heat exchanger for an air conditioner, and to provide refrigerant piping for a heat exchanger cycle having excellent strength and corrosion resistance.;SOLUTION: The extruded tube for a fin tube type heat exchanger for an air conditioner or refrigerant piping for a heat exchange cycle is composed of an aluminum alloy having a composition containing 0.01 to 1.2 mass% Fe, 0.01 to 1.5 mass% Mn, 0.01 to 0.3 mass% Cr and ≤0.2 mass% Si, and the balance Al with inevitable impurities. In this invention, it is preferable that the content of Cu is controlled to ≤0.05 mass%, the content of Na is controlled to ≤10 mass% and also the content of Zn is controlled to 0.1 to 1.0 mass%.;COPYRIGHT: (C)2011,JPO&INPIT