Loading patent…
AssigneeSumitomo Light Metal Industries, Ltd.
InventorsTakahiro Koyama, Hirokazu Tanaka, Yoshifusa Shoji
Estimating the term…
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 is made of an aluminum alloy which contains 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 being Al and impurities, wherein, among Si compounds, Fe compounds, and Mn compounds present in the alloy's matrix, the number of compounds with a particle diameter (equivalent circle diameter, hereinafter the same) of 0.5 μm or more is 3×104 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.
An aluminum alloy piping material for automotive piping having excellent corrosion resistance and workability, said aluminum alloy piping material comprising an aluminum alloy consisting of, in mass %, 0.3-1.5% of Mn, 0.01-0.20% of Fe, 0.01-0.20% of Si, 0.4% or less of Mg and the balance being Al and impurities, the content of Cu as an impurity being 0.05% or less, 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 no more than 3×104 per mm2.
An aluminum alloy piping material for automotive piping having excellent corrosion resistance and workability, said aluminum alloy piping material comprising an aluminum alloy consisting of, in mass %, 0.3-1.5% of Mn, 0.01-0.20% of Fe, 0.01-0.20% of Si, 0.4% or less of Mg, 0.01-0.2% of Zr and the balance being Al and impurities, the content of Cu as an impurity being 0.05% or less, 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 no more than 3×104 per mm2.
An aluminum alloy piping material for automotive piping having excellent corrosion resistance and workability, said aluminum alloy piping material comprising an aluminum alloy consisting of, in mass %, 0.3-1.5% of Mn, 0.01-0.20% of Fe, 0.01-0.20% of Si, 0.4% or less of Mg and the balance being Al and impurities, the content of Cu as an impurity being 0.05% or less, wherein among Si compounds, Fe compounds and Mn compounds present in the alloy's matrix, compounds with an equivalent circle particle diameter of 0.5 μm or more are present in an amount not exceeding 3×104 per mm2.
An aluminum alloy piping material for automotive piping having excellent corrosion resistance and workability, said aluminum alloy piping material comprising an aluminum alloy consisting of, in mass %, 0.3-1.5% of Mn, 0.01-0.20% of Fe, 0.01-0.20% of Si, 0.4% or less of Mg, 0.01-0.2% of Zr and the balance being Al and impurities, the content of Cu as an impurity being 0.05% or less, wherein among Si compounds, Fe compounds and Mn compounds present in the alloy's matrix, compounds with an equivalent circle particle diameter of 0.5 μm or more are present in an amount not exceeding 3×104 per mm2.
Dependencies are inferred from the claim text.