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
Product Data Sheets
Safety Data Sheets
Bismuth Blog Posts
If you haven’t heard about Bi-containing (bismuth) solder alloys recently, that may change in the near future. Low-melting Bi-containing solders are now in increasing use and gaining popularity due to their lower melting temperatures—58Bi/42Sn is eutectic at 138°C and 57Bi/42Sn/1Ag melts…
I’ve always been a strong believer that a customer should not get a solder alloy that just “works” for their application, they should get the best alloy for their application. Of course, this is a compromise between all the factors that are important. Bond strength, unique properties,…
Folks, It surprises many people that the foundation metal of almost all solder alloys is tin. Alloy elements such as lead, silver, copper, indium, etc., are extremely important, as they lower the solder melting temperature below tin’s relatively high 232C and often improve wetting and other…
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