noob question about solder

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  • angelofhope
    New Member
    • Apr 2007
    • 6

    #1

    noob question about solder

    I have found this solder wire lying around, it is 0.5mm Sn62PbAg2 http://www.radielfondam.com/, any idea if this is any good for recapping a motherboard?

    TIA
    Last edited by willawake; 04-25-2007, 02:18 PM. Reason: fix linky
  • Spacedye69
    Badcaps Veteran
    • Nov 2005
    • 698
    • US

    #2
    Re: noob question about solder

    Looks good. It should flow well.

    Note: Admins may want to edit the link and remove the last parenthesis!

    Comment

    • angelofhope
      New Member
      • Apr 2007
      • 6

      #3
      Re: noob question about solder

      Tried it on a very old board, just to see if I might be able to recap another board, seems like the biggest problem is getting the whole clean... is this really necessary? anyway, the solder was really easy to work with, although I can't test if it's well connected, because the board didn't work to start with and I just tried removing some caps and reinserting them again.
      Still found it difficult enough, but it might be worth the risk if there's a possibility I might get my K7VTA3 working again.
      Last edited by angelofhope; 04-25-2007, 02:11 PM.

      Comment

      • starfury1
        Badcaps Legend
        • May 2006
        • 1256

        #4
        Re: noob question about solder

        For clearing the pcb holes check the FAQ's on this site and practice on junk pcb first.
        (stainless steel needle or dentist pick)

        As to the solder well from what I gather above and the site
        (which I can't read)

        Sn = Tin
        P b= lead
        Ag = Silver

        From periodic table Here

        So
        62% tin
        2% silver
        36% lead
        if I read it right (think you may have missed the PB spec but not sure)

        60/40 is what is normally used for Electronics although this has now changed thanks to RoHS

        60/40 solder allows a small "plastic" state between liquid and solid states when cooling.
        (63/37 offers min plastic state, not Ideal from memory so 60/40 was chosen)

        So that should be ok to use

        I am not into the use of more exotic types solders but if its not flux cored you will need to use electronics type flux with it.

        my thoughts HTH

        Cheers

        as always I'll stand to be corrected if wrong
        You step into the Road, and if you don't keep your feet, there is no knowing where you may be swept off to." Bilbo Baggins ...

        Comment

        • 999999999
          Badcaps Veteran
          • Sep 2006
          • 774
          • USA

          #5
          Re: noob question about solder

          For the sake of completeness I resurrect this old thread.

          63/37 is the preferred eutectic forumlation. Having 60/40 stay in a plastic state is more often a bad, not good thing, as it may result in cold solder joints when a part doesn't stay perfectly still.

          There is no good reason to choose a tin/lead solder that also has silver in it. That will just require more heat to melt it. Yes you "could" use it, and have a fine result but if we're splitting hairs then having silver in it is worse than not for a typical repair scenario where there no way to precisely control the soldering temp. Even if you have a highly accurate soldering iron with regulated temp you are still maintaining far above the melting point of the solder, sometimes much higher when soldering caps onto power planes.

          Comment

          • willawake
            Super Modulator
            • Nov 2003
            • 8457
            • Greece

            #6
            Re: noob question about solder

            i use 60/40....cold joints who me?
            capacitor lab yachtmati techmati

            Comment

            • gonzo0815
              Badcaps Legend
              • Feb 2006
              • 1600

              #7
              Re: noob question about solder

              Silver containing solder is used and promoted for SMD devices, as silver containing solder does better wet the the parts.
              Sure, for leaded soldering i think it is not necessary for trough hole components.
              In case of lead free soldering, AFAIK Ag containing alloys have the lowest melting point compared to other lead free alloys.

              Comment

              • 999999999
                Badcaps Veteran
                • Sep 2006
                • 774
                • USA

                #8
                Re: noob question about solder

                Silver solder in general tends to have a more active flux, and optionally, a higher % of flux. These two factors can make the silver bearing solder flow (wet) as well or better, but by the same measure the stronger and/or higher % of flux could be selected in a non-silver (PbSn) solder and then it would flow/wet better (best). Unfortunately beyond a MSDS, many solder manufacturers aren't so eager to fully disclose the compositions of their flux beyond the main active ingredient and carrier.

                Comment

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