Title:
ALUMINUM ALLOY FOR EXTRUDED ELEMENT PIPE PROVIDED WITH INNER SURFACE LINEAR GROOVE, EXTRUDED ELEMENT PIPE PROVIDED WITH INNER SURFACE LINEAR GROOVE, PIPE PROVIDED WITH INNER SURFACE HELICAL GROOVE, AND PRODUCTION METHOD FOR HEAT EXCHANGER
Document Type and Number:
WIPO Patent Application WO/2023/286870
Kind Code:
A1
Abstract:
This aluminum alloy, for an extruded element pipe (1) provided with an inner surface linear groove, is for the production of pipes provided with an inner surface helical groove. When D (mm) and t (mm) respectively represent the outer diameter and bottom wall thickness of the extruded element pipe (1) provided with an inner surface linear groove, and when W (mm) and h (mm), respectively represent the width and height of each internal fin (3) formed on the inner surface of the extruded element pipe (1) provided with an inner surface linear groove, h/W equals 0.7 or more and D/t equals 26 or more. The alloy has a compositional make-up containing 0.35-0.55 mass% of Si, at most 0.15 mass% of Cu, 0.45-0.65 mass% of Mg, at most 0.05 mass% of Mn, 0.71-1.03 mass% of Mg2Si, and 0.08-0.29 mass% of excess Si, the balance being incidental impurities and aluminum.
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Inventors:
FUKUMASU HIDEAKI (JP)
NAKAMOTO MASAYUKI (JP)
BOUYAMA HIROSHI (JP)
SAKAGAMI TAKESHI (JP)
NAKAMOTO MASAYUKI (JP)
BOUYAMA HIROSHI (JP)
SAKAGAMI TAKESHI (JP)
Application Number:
PCT/JP2022/027936
Publication Date:
January 19, 2023
Filing Date:
July 15, 2022
Export Citation:
Assignee:
MA ALUMINUM CORP (JP)
International Classes:
B21H3/00; B21D53/06; C22C21/00; C22C21/02; C22C21/06; C22F1/00; C22F1/05; F28F1/40; F28F21/08
Foreign References:
| JP2005139490A | 2005-06-02 | |||
| JP2008267788A | 2008-11-06 | |||
| JPH09101093A | 1997-04-15 | |||
| JP2003294387A | 2003-10-15 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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