Aluminum alloy piping material for automotive tubes having...

Details Aluminum alloy piping material for automotive tubes having... Aluminum alloy piping material for automotive tubes having...

2007-05-01

2007-05-01

King, Roy (Department: 1742)

Metal treatment

Stock

Aluminum base

C420S553000, C420S551000

Reexamination Certificate

active

10674283

ABSTRACT:
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 μm or less, and Ti-based compounds having a grain size (circle equivalent diameter, hereinafter the same) of 10 μm or more do not exist as an aggregate of two or more serial compounds in a single crystal grain.

REFERENCES:
patent: 5976278 (1999-11-01), Sircar
patent: 04285139 (1992-10-01), None
patent: 2001-026831 (2001-01-01), None
patent: 2001-026831 (2001-01-01), None
patent: 2001-342532 (2001-12-01), None
patent: 2002180171 (2002-06-01), None

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