Gabe-
Dave Hillman pretty much summed it up.  In general, alloys with Bismuth
(which allows for lower melting and liquidus temperatures, do tend to be
relatively brittle (as compared to good  ol' SnPb.  However, in view of the
reliability data, your application may be okay.  A number of years ago, if I
recall correctly, Unisys (Roseville) was using a SnPbBi alloy but the
reliability was ample for their application.  My main contact in that (now
defunct) group was Mike Buseman who is now with MSL in Roseville, MN.  You
might try to reach him or Don Burr (who I believe is still with
Unisys-Roseville) for further details.

Phil Zarrow
ITM, Inc.
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