ALUMINUM ALLOY HOLLOW MATERIAL, ALUMINUM ALLOY EXTRUDED PIPE MATERIAL FOR AIR CONDITIONING PIPING AND METHOD OF MANUFACTURING IT

Title:

ALUMINUM ALLOY HOLLOW MATERIAL, ALUMINUM ALLOY EXTRUDED PIPE MATERIAL FOR AIR CONDITIONING PIPING AND METHOD OF MANUFACTURING IT

Document Type and Number:

WIPO Patent Application WO/2000/073529

Kind Code:

A1

Abstract:

An aluminum alloy hollow material manufactured by port-hole-extruding or port-hole-extruding and extraction-drawing an aluminum alloy ingot containing at least 0.3 to 1.5 wt.% of Mn, wherein differences in electric conductivity between sections in a lengthwise direction of the hollow material are less then 1.0 IACS % and a preferential corrosion at deposited portions during port-hole-extrusion can be prevented; and a method of manufacturing the hollow material.

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Inventors:

TAGUCHI KAZUO (JP)
OHTA TOSHIO (JP)

Application Number:

PCT/JP1999/002843

Publication Date:

December 07, 2000

Filing Date:

May 28, 1999

Export Citation:

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Assignee:

FURUKAWA ELECTRIC CO LTD (JP)
TAGUCHI KAZUO (JP)
OHTA TOSHIO (JP)

International Classes:

F28F21/08; B21C23/08; C22C21/00; C22C21/18; C22F1/00; C22F1/04; (IPC1-7): C22F1/04; C22C21/00

Foreign References:

JPH0472045A	1992-03-06
JPS61119645A	1986-06-06
JPS59185765A	1984-10-22
JPH09263917A	1997-10-07
JPH11172388A	1999-06-29

Attorney, Agent or Firm:

Iida, Toshizo (Shimbashi 3-chome Minato-ku Tokyo, JP)

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