Peter -- I use 6%-Ag, 94% Sn. It melts at 221ºC. It's not as
strong as other silver-solders, but it can be soldered with an plain
vanilla soldering iron instead of a flame-thrower.
cheers
On Apr 5, 2004, at 6:51 AM, peter.chadwick@Zarlink.Com wrote:
Rich said:
However, the old solder is Pb-Sn (lead-tin), which should not be mixed
with silver solder,
I'm not sure exactly what Rich means by 'silver solder' in this
context. If
he means the high temperature ( 600 - 800 deg C) stuff we use for model
steam engine boilers and fittings, you have to get all of the lead/tin
out,
or it won't solder at all. Lead/tin alloy will solder to silver solder
OK,
but not the other way around. The 'silver solder' I use has borax as a
flux, needs a gap of around 0.001 to 0.002 inches to flow into, and
runs
beautifully.
I suspect Rich means a 'HMP' - 'High Melting Point' alloy, containing
some
silver, rather than a true silver solder like 'Easyflo' (which also
contains cadmium, and needs particulalry good ventilation if you're
going
to do a lot of soldering).
73
Peter G3RZP
Rich Measures, AG6K, 805.386.3734. www.somis.org/
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