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AssigneesDenso Corporation, Sumitomo Light Metal Industries, Ltd.
InventorsYoshiharu Hasegawa, Haruhiko Miyachi, Hirokazu Tanaka, Yoshifusa Shoji, Takahiro Koyama, Toshihiko Fukuda
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An aluminum alloy piping material exhibiting good corrosion resistance and having an excellent workability, such as bulge formation capability at the pipe ends. The aluminum alloy piping material is suitably used for pipes connecting automotive radiators and heaters or pipes connecting evaporators, condensers, and compressors. The aluminum alloy material is formed from an aluminum alloy which contains 0.3-1.5% of Mn, 0.20% or less of Cu, 0.06-0.30% of Ti, 0.01-0.20% of Fe, and 0.01-0.20% of Si, with the balance being Al and impurities, wherein, among Si compounds, Fe compounds, and Mn compounds present in the matrix, the number of compounds with a particle diameter of 0.5 μm or more is 2×104 or less per mm2. The aluminum alloy piping material may further comprise 0.4% or less of Mg.
An aluminum alloy piping material having an excellent corrosion resistance and workability, said aluminum alloy piping material comprising an aluminum alloy consisting of, in mass %, 0.3-1.5% of Mn, 0.20% or less of Cu, 0.06-0.30% of Ti, 0.01-0.20% of Fe and 0.010-0.20% of Si, with the balance being Al and impurities, wherein among Si compounds, Fe compounds and Mn compounds present in the alloy's matrix, the number of compounds with an equivalent circle particle diameter of 0.5 μm or more is from 1×103-2×104 per mm2.
An aluminum alloy piping material having an excellent corrosion resistance and workability, said aluminum alloy piping material comprising an aluminum alloy consisting of, in mass %, 0.3-1.5% of Mn, 0.20% or less of Cu, 0.06-0.30% of Ti, 0.01-0.20% of Fe, 0.01-0.20% of Si and Mg in an amount not exceeding 0.4%, with the balance being Al and impurities, wherein among Si compounds, Fe compounds and Mn compounds present in the alloy's matrix, the number of compounds with an equivalent circle particle diameter of 0.5 μm or more is from 1×103-2×104 per mm2.
The aluminum alloy piping material of claim wherein the Fe content is 0.01-0.09%.
An aluminum alloy piping material having an excellent corrosion resistance and workability, said aluminum alloy piping material comprising an aluminum alloy consisting of, in mass %, 0.3-1.5% of Mn, 0.20% or less of Cu, 0.06-0.30% of Ti, 0.01-0.20% of Fe, 0.01-0.20% of Si and at least one of 0.01-0.2% of Cr and 0.01-0.2% of Zr, with the balance being Al and impurities, wherein among Si compounds, Fe compounds and Mn compounds present in the alloy's matrix, the number of compounds with an equivalent circle particle diameter of 0.5 μm or more is from 1×103-2×104 per mm2.
Dependencies are inferred from the claim text.