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One example of the present invention provides an aluminum alloy comprising : 0.1-5.0 wt% of misch metal; 0.3 wt% or less of silicon (Si); 0.7 wt% or less of iron (Fe); 0.5 wt% or less of copper (Cu); 0.3 wt% or less of zinc (Zn); and the remaining consisting of aluminum and other inevitable impurities. In addition, the aluminum alloy does not contain manganese (Mn) or is contained as a trace inevitable impurity. As such, the aluminum alloy in accordance with an example of the present invention is able to be used as extrusion material for heat exchanger parts, specifically, microchannel-tubes or header pipes.COPYRIGHT KIPO 2017