Guenter, You stated that eutectic solder creeps so quickly above 0C that it does not reach any yield strength. I have come across some yield strength values for 63Sn/37Pb solder but from what you are saying, I assume the strain rate to actually fracture the solder (in a ductile manner) must be quite high. Any idea of where I could find numbers for such strain rates. Thanks, Breton Fleming ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################