Hi Jim, Tyco-Bob, Jean-Paul, and IPC LF Listservers,

<Thank you for your response.  Like many other issues in this Lead-Free
transition, it sounds as if "tin pest" has been overblown.>

I am not sure YET that the issue is overblown. I believe that based on the
environments of certain products or certain product life conditions that we
may see this selectively in real life applications. In June Tin's KayN
(Soldertec) did respond to us that ITRI has not seen any effect and
privately others have also written to me that they have yet to see any
effect.

My first guess is product that has to survive continual cold temperatures
like in the Artic or in refrigerator/freezers where -40C/-40F is common or
in other applications like thermoelectric coolers.

As for a nucleation site for the transformation to get started, I am less
clear of how that all happens. More Study, or the Luck of being an IPC LF
Listserver is needed.

If you look at the UK's Open University Report it seems obvious that we
will see this under certain conditions. The sample just had too too much
Tin Pest to be a coincidence.


Yours in Engineering, Dave
Y i Engr, MA/NY DDave

-------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Leadfree
To temporarily stop delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL
Search previous postings at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
-------------------------------------------------------------------------------