"Glenn Cramond" wrote in message
om...
I need to soft solder some 18# stainless steel and would really
appreciate some tips please.

Ortho-phosphoric acid (undiluted) always worked well for me when making low
temperature research kit with very thin-wall ss tubes - usually soldered to
ss, brass or copper.

I think I found it in this book - I used to refer to it a lot, but I seem to
have mislaid the book now so I can't check.

WJ Tegart, "The Electrolytic and Chemical Polishing of Metals in
Research and Industry" (Pergamon Press, Inc., London, 1959)



Mike