(Mark Stonich) wrote in
om:

rorschandt wrote in message news:

Reynolds 853 is recommended to be used
with lugged construction silver brazed methods.

DEFINITELY NOT!!!! See; http://www.reynoldsusa.com/prop/853.html
where you will see that silver brazing is on Reynolds' list of "Tips
on what you MUST NOT do with Reynolds 853"

Can't really argue with the Reynolds website! I don't know where I got the
silver part(sorry!), but the rest is just quoting from the Bob Jackson
website:
"The main advantage of Reynolds 853 is its ability to air harden after
joining, a characteristic not shown by other chrome molybdenum / manganese
molybdenum materials presently on the market. When building frames using
either TIG welding or high temperature brazing, above 1600 degrees, the
joints increase in strength as the frame cools to room temperature.

LUG CONSTRUCTION IS THE PREFERRED METHOD OF JOINING 853. It allows a much
larger area to be heated than tig welding which concentrates the heat to a
very small area at the weld. This completely goes against the “AIR
HARDENING” building philosophy of the material and adds nothing to the
strength of the joint. It is however a much cheaper joining method,
requiring less time and skill to perform."

I'm unlikely to be using the stuff myself. For now, 4130 crmo and 6061 and
7000 series aluminums serve my purposes fine. I have used chunks of heat
hardening steels for other machined parts, not on frames. I wonder how they
control the distortions in a "air hardened" tube?

rorschandt