Below is a list of the most common bismuth alloys. A listing of many others is available in our Solder Alloy Selector Guide.
|42||46Bi 34Sn 20Pb||96°C||96°C||Low temperature eutectic solder. Can be used on the same metallizations as SnPb solders. Lowest temperature alloy available as a solder paste.|
|281||58Bi 42Sn||138°C||138°C||Eutectic Pb-Free version. Low melting temperature that is good for step soldering applications.|
|282||57Bi 42Sn 1Ag||140°C||139°C||More malleable and ductile than #281.|
|97||43Sn 43Pb 14Bi||163°C||144°C||Good general purpose step soldering alloy.|
|281-338||60Sn 40Bi||170°C||138°C||General purpose Pb-Free alloy with good physical properties.|
Bismuth Solders Technical Documents
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Safety Data Sheets
Bismuth Blog Posts
Some alloys that melt below 300° Celsius are used for applications other than joining two surfaces.
Low temperature alloys have a number of applications, including step soldering and interconnection of molded components. Additionally, its thermal and electrical conductivity make it attractive for bonding and heat transfer.
Expansion during cooling is a property of low-temperature alloys that can be very useful.
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