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Thread: How to measure the melting point of solder

  1. #1 How to measure the melting point of solder 
    ybk
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    Hey...

    Got a simple question: How do you effectively measure the melting point of solder (lead and tin alloy)

    Just sticking a thermometer in there seems too inacurate.

    anywayz, thanks in advance!!!


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  3. #2  
    Forum Ph.D.
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    Well, seeing as it is a combination, I doubt it has a melting point. Rather, I believe, it will have a course of temperatures in which it parts of it will go from l -> s and vice versa.

    Not so hot ------|-------------x----------- quite hot

    |= beginning to become liquid
    x= completely liquid

    You could measure these points with relative accuracy in most standard labs.

    Mr U


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  4. #3  
    Forum Isotope (In)Sanity's Avatar
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    Yah, almost sounds like you need a hot plate with an accurate readout. One that can get very hot at that. Also solder varries in makup, are we talking 60/40 lead/tin or 58/42, etc. Then of course we have silver based stuff.
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  5. #4  
    ybk
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    Quote Originally Posted by (In)Sanity
    Yah, almost sounds like you need a hot plate with an accurate readout. One that can get very hot at that. Also solder varries in makup, are we talking 60/40 lead/tin or 58/42, etc. Then of course we have silver based stuff.
    it doesnt matter what composition the thing is in.

    ummmm... HomoUniversalis makes sense, but the thing is, how do we accuratly get the temperatures.

    thanks!!
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  6. #5  
    ybk
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    figured it out myself... w00t.....

    btw, eutectic mixtures such as alloys have lower melting points than their component metatls.

    They have a sharp melting point...
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  7. #6  
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    Lower? Intriging. Please, post your findings, and your methods of determination.

    Mr U
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  8. #7  
    ybk
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    Quote Originally Posted by HomoUniversalis
    Lower? Intriging. Please, post your findings, and your methods of determination.

    Mr U
    will do... but it's too late... well, actually, early... 4AM... i just finished all my assignments....

    tomorrow :wink:
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  9. #8  
    ybk
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    Well, maybe not all alloys, but for solder, it melts at 183 degrees celsius. As compared to its component metals lead and tin which melt at 280* and 200* (or something like that)

    Yeah, this is due to the impurities.
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