From: muratlanne@gmail.com   
      
   "Bob La Londe"  wrote in message news:10nac3h$ld39$1@dont-email.me...   
      
   Silfos (typically 15) is for copper to copper or copper to bronze.  I   
   have a couple pieces I used for soldering copper tube on an AC unit.   
   Silfos is nice for copper as it is supposed to be self fluxing, making   
   out of position work easier in theory.  In reality I only got good   
   joints on the bench.   
   --------------------------------   
      
   On steel Silfos forms brittle iron phosphide that weakens the joint.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)