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Aluminum alloy extruded product exhibiting excellent surface properties, method of manufacturing the same, heat exchanger multi-port tube, and method of manufacturing heat exchanger including the multi-port tube

  • US 20070017605A1
  • Filed: 07/20/2006
  • Published: 01/25/2007
  • Est. Priority Date: 07/22/2005
  • Status: Abandoned Application
First Claim
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1. An aluminum alloy extruded product exhibiting excellent surface properties, comprising 0.8 to 1.6% (mass %;

  • hereinafter the same) of Mn and 0.4 to 0.8% of Si at a ratio of Mn content to Si content (Mn %/Si %) of 0.7 to 2.4, with the balance being Al and inevitable impurities, the number of intermetallic compounds with a diameter (circle equivalent diameter;

    hereinafter the same) of 0.1 to 0.9 μ

    m dispersed in a matrix being 2×

    105 or more per square millimeter.

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