If we assume that a high cooling rate is important (~4 C/sec), does anyone
have information about how far below solidus it is important to maintain a
high cooling rate for Sn62 and Sn63?

I've always gone by the rule of thumb that the critical cooling range is
from peak temp down to solidus minus 20C or 30C.  Once you get below
solidus minus 20C or 30C the fine grain structure is in practice fairly
well established.

Any thoughts?

---------------------------------------------------------------------------------
Technet Mail List provided as a free 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 Technet
To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL
Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315
---------------------------------------------------------------------------------