Safety of Harris DynaFlow Silver Phos-copper Brazing Alloy

[JoeFL77]

Hello,

I have some of:
Harris DynaFlow
Silver Phos-copper Brazing Alloy
Part# 66000

I was wondering of the safety of using this in a Build. After reading about it, it seems it can only be used to join copper and not stainless.

Silver 6.0
Phosphorus 6.1
Copper Remainder
Other (Total) 0.15

Thanks!

[zed255]

I usually use a food safe 45% silver hard solder / silver braze and the white flux paste. This stuff will bond almost anything and most certainly anything you'd use in a still. The higher silver content makes this wire flow like water and capillary action will wick it right into a properly fluxed and heated joint. I prefer to silver braze over using a lead free silver bearing soft solder.

The other types of rods like you have vary in composition but the main alloying elements to avoid are cadmium, antimony and zinc (and of course lead, though lead is not normally a part of a high temp alloy). If I were choosing a rod other than my high silver wire I'd go for a product with a little more silver, say 15% silver that specifically mentions no cadmium, zinc or antimony.

[JoeFL77]

xed255,
I agree the 45% silver is great. However, I have a lot of Dynaflow Silver Phos-copper. Planning to use it on copper when I build things if it is safe.