Re: [CR] Silver solder and such

(Example: Framebuilding:Brazing Technique)

To: smaas@nonlintec.com
Date: Wed, 12 Mar 2003 19:37:51 -0500
Subject: Re: [CR] Silver solder and such
From: "Richard M Sachs" <richardsachs@juno.com>
cc: classicrendezvous@bikelist.org

replying to... snipped: Steve Maas <smaas@nonlintec.com> writes: 1)"There are also manufacturers of silver-containing solders, having melting points around 600F, which they also call "silver solder." and 2) "Somewhere I read that the older Columbus tubes were limited in brazing temperatures to about 1300F (sorry if this isn't accurate; going by memory here, always dangerous); obviously, they had to be silver brazed, and there was quite a narrow range between melting the brazing alloy and overheating the joint. (I don't know if this is true of modern tubes.) Perhaps this could shed some light on the earlier discussion of frame cracking after rough use."

1) yeah-but that's not applicable to bicycle framemaking.
      jewelry maybe. not bicycles... 2) in spite of that information being part of Columbus'
      speeeil (sp?) since the 60s, i'd lay odds that more than
      99% of the frames built during that era were brassed
      brazed. that 'warning' from Columbus reminds me of
      the instructions on shampoo bottles: shampoo. rinse.
      and shampoo <again>. e-RICHIE chester, ct