I am looking for an alloy with low melting temperature (< 350°C) which is not toxic when in direct constant contact with skin, food and overall in domestic environment. My application is a solder that can be used for soldering a ring.
1 Answer
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I'm not a metallurgist, which you should probably ask... but there is this that I found:
Both Cadmium and Lead are toxic, but Bismuth, Indium, and Tin are not. An alloy of those might be what you're looking for. Indium raises the price-point considerably, as it's a few magnitudes more expensive than Bismuth and Tin.
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$\begingroup$ Metallurgist will most probably tell that toxicity is for biologist or toxicologist and there is no stackexchange for metallurgist yet $\endgroup$– tigCommented Aug 3, 2013 at 11:09
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1$\begingroup$ Rather than a metallurgist I would probably ask a jeweler... they should definitely know what they are allowed to use. $\endgroup$– nicoCommented Aug 3, 2013 at 13:09
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$\begingroup$ @nico: just tried contacting jewelers, though not sure if they use low melting point alloys $\endgroup$– tigCommented Aug 4, 2013 at 13:45
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$\begingroup$ @tig: right, did not think about that $\endgroup$– nicoCommented Aug 4, 2013 at 20:43