At 05:26 PM 7/19/2006, Jon Schaer wrote:
>At 06:15 AM 7/19/06 -0500, John Thompson wrote:
>
> >Using brass requires higher temperature and thereby negates the
> >advantage of the heat treatment. Use brass and all you have is a
> >light-gauge 531 set.
>At this year's Cirque, Dave Moulton said that he always used brass for
>753. Thought that his torch flame and brazing speed avoided overheating.
>I think he even said his sample passed with Reynolds.
Nah, it's about temperature not time. If he got it hot enough to melt the brass, he got it hot enough to undo the heat treatment. The heat treatment was the thing the Reynolds folks were looking to preserve. Hence the recommendation to silver braze. Silver melts before the heat treatment goes away. I mean no disrespect to Dave but physics are physics. With that said, plenty of 753 bikes were successfully brass brazed. Why? I don't know but frame builders are a stubborn lot. Tell them you can't do something and they'll do it just in spite. I use 753 on a weekly basis. Silver brazed, of course.
Curt Goodrich
Minneapolis, MN