Double walled metal tube, metal band and strip, and method of coating a metal strip
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United States of America Patent
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Issued Date -
Apr 12, 2007
app pub date -
Jun 16, 2004
filing date -
Jun 18, 2003
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Abandoned
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Abstract
The invention relates to a double walled metal tube comprising a tubular roll formed metal band having a brazing layer between the metal layers of the tubular roll formed metal band, wherein the brazing layer consists of a copper alloy. According to the invention, the copper alloy is a copper-tin alloy, wherein the copper-tin alloy contains 3-12 wt % tin. The invention also relates to a metal band for forming such a double walled metal tube and to a metal strip for producing such metal bands, and to a method of coating a metal band and strip.
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