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Low-temperature, lead-free solders

Joseph Holmes

#11876

Low-temperature, lead-free solders | 19 April, 1999

Do solders exist that are both lead-free and low-temperature (e.g. 100-170 Celsius range)? If so, who supplies these materials? Any websites or contact information would be most helpful.

Also, I am not an expert on soldering, so any good websites on soldering alloys and process options would be most helpful.

Thanks!

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#11877

Re: Low-temperature, lead-free solders | 19 April, 1999

| Do solders exist that are both lead-free and low-temperature (e.g. 100-170 Celsius range)? If so, who supplies these materials? Any websites or contact information would be most helpful. | | Also, I am not an expert on soldering, so any good websites on soldering alloys and process options would be most helpful. | | Thanks! | Joseph: Most sodder companies have tables of characteristic on their products. An example is:

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Scott Davies

#11878

Re: Low-temperature, lead-free solders | 20 April, 1999

Joseph,

I've heard of a lead free solder alloy, Sn43/Bi57 that melts at 139�C and reflows between 160-170�C. You may find the following website useful.

Good Luck Scott

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Scott Davies

#11879

Re: Low-temperature, lead-free solders | 20 April, 1999

Joseph, I've heard of a lead free solder alloy, Sn43/Bi57 that melts at 139�C and reflows between 160-170�C. You may find the following website useful:

www.cobar.com Good Luck Scott |

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Rick

#11880

Re: Low-temperature, lead-free solders | 22 April, 1999

| | | Do solders exist that are both lead-free and low-temperature (e.g. 100-170 Celsius range)? If so, who supplies these materials? Any websites or contact information would be most helpful. | | | | | | Also, I am not an expert on soldering, so any good websites on soldering alloys and process options would be most helpful. | | | | | | Thanks!

Try this site for more help on Low-Temp, Pb-Free alloys: http://www.indium.com/leadfree/pb_free.html Rick | | | | | Joseph: Most sodder companies have tables of characteristic on their products. An example is: | | | |

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Rick

#11881

Re: Low-temperature, lead-free solders | 22 April, 1999

| | Do solders exist that are both lead-free and low-temperature (e.g. 100-170 Celsius range)? If so, who supplies these materials? Any websites or contact information would be most helpful. | | | | Also, I am not an expert on soldering, so any good websites on soldering alloys and process options would be most helpful. | | | | Thanks! | |

| Joseph: Most sodder companies have tables of characteristic on their products. An example is: | ******* This alloy is nearly the same as the much more common58Bi42Sn ((eutectic at 138�C). The shortcoming (depending on your requirements) of this alloy is its brittleness, it has a high tensile strength but low shear strength. In paste form I recommend fluxes with low activation temperatures and good SIR readings low temperatures. WARNING!!! When used with Sn/Pb plated components, or if Pb is introduced in any way, a PbSnBi ternary eutectic can form reducing the resultant solder joint melting temperature to below 100�C

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