| 摘要 |
An aluminum alloy piping material for automotive piping excelling in corrosion resistance and workability and a method of fabricating the same. The aluminum alloy piping material comprises an aluminum alloy which comprises 0.3-1.5% of Mn, 0.01-0.20% of Fe, and 0.01-0.20% of Si, wherein the content of Cu as impurities is limited to 0.05% or less, with the balance consisting of Al and impurities, wherein, among Si compounds, Fe compounds, and Mn compounds present in the alloy matrix, the number of compounds with a particle diameter (equivalent circle diameter, hereinafter the same) of 0.5 mum or more is 3x104 or less per mm2. The aluminum alloy piping material has a tensile strength of 70-130 MPa (temper: O material). An ingot of an aluminum alloy having the composition is hot extruded. The resulting extruded pipe is cold drawn at a working ratio of 30% or more and annealed.
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