Silver solder identification by rod colour. low/hi temp

Silver solder identification by rod colour. low/hi temp

Home Forums Beginners questions Silver solder identification by rod colour. low/hi temp

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  • #144244
    jo Orme
    Participant
      @joorme63135

      Hi all.

      My father gave me his workshop when he stopped ME, with it came a big pile of silver solder. I was trying to solder some steel the other night to fabricate a door hinge for a traction engine but found the solder was not really melting when the flux was. it more like a soft goo instead of flowing.

      after a phone call to speak with dad he said it will be all mixed up! some hi and some low (easy flow) I'm wondering how i can tell whats what? some rods are a light straw colour and some are a darker straw colour. can anyone tell me what easyflow should look like colour wise and if high temp solder is lighter or darker in colour.

      thanks for your help..

      Jo

      Edited By jo Orme on 17/02/2014 18:29:59

      #7043
      jo Orme
      Participant
        @joorme63135
        #144261
        Neil Wyatt
        Moderator
          @neilwyatt

          The colour is, as far as I can tell, just a sign of the gradual tarnishing of the silver content.

          Why not cut a short piece off each rod (keeping the clippings and rods in order) and heat them all together and see which melt.

          Neil

          #144268
          shaun meakin 1
          Participant
            @shaunmeakin1

            hi Jo. Unfortunately as Neil says colour is really no indication of silver content. If you can sort the various rods into their various colours what Neil suggests is an excellent test to show the differing melting points. However, there is no substitute to buying silver solder properly labelled and certified. Using the wrong material can prove costly. For further advice and tips please visit http://www.cupalloys.co.uk

            #144283
            oldvelo
            Participant
              @oldvelo

              Hi Jo

              A simple test for silver solder Learned a lad.

              Grab a stick and bend it If it bends easily the it is most probably "Easy Flo" Low Temp "flux required"

              If it is hard to bend then it is "Silfos" used for no flux joins in copper and bronzes.

              Eric

              #144284
              julian atkins
              Participant
                @julianatkins58923

                eric,

                i agree silfos (quite unsuitable for boiler work) isnt as easy to bend. but what about the old C4 and B6? they looked the same and were as easy to bend as easyflo!

                cheers,

                julian

                #144310
                jo Orme
                Participant
                  @joorme63135

                  thanks for all your help. i'll have a go at some of the above tonight.

                  must be about £1000 worth of silver solder. i'm building a 4" Foster so no need for a copper boiler just fabrication.

                  still learning allot the only other model i've made is a stuart S50. but i'm making all the patterns for the Foster myself and have had some cast that came out great.

                  Jo

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