| 摘要 |
An aluminum alloy piping material for automotive tubes having excellent tube expansion formability by bulge forming at the tube end and superior corrosion resistance, which is suitably used for a tube connecting an automotive radiator and heater, or for a tube connecting an evaporator, condenser, and compressor. The aluminum alloy piping material is an annealed material of an aluminum alloy containing 0.3 to 1.5% of Mn, 0.20% or less of Cu, 0.10 to 0.20% of Ti, more than 0.20% but 0.60% or less of Fe, and 0.50% or less of Si with the balance being aluminum and unavoidable impurities, wherein the aluminum alloy piping material has an average crystal grain size of 100 mum or less, and Ti-based compounds having a grain size (circle equivalent diameter, hereinafter the same) of 10 mum or more do not exist as an aggregate of two or more serial compounds in a single crystal grain.
|
