Dear Technetters, Thank you very much for all your replies and docs/links. Indeed, during my initial "googling", I missed the ductile to brittle transition words. For now, I cannot much discuss the other parameters as I did not meet the designer yet. I may come back with some other questions afterwards. Thanks again for your time. Kind regards sylvain PS: sorry I did not put a subject on my first e-mail, I hit the send button too quickly -------------------------------------------------------------------- Sylvain Kaufmann CERN / European Laboratory for Particle Physics Rte de Meyrin dpt. TE-MPE-EM 1211 Geneva 23 Tel: +41 22 767 37 02 Fax: +41 22 766 87 77 www.cern.ch -------------------------------------------------------------------- -----Original Message----- From: Graham Naisbitt [mailto:[log in to unmask]] Sent: 22 February 2011 16:19 To: Sylvain Kaufmann; TechNet Forum Subject: Re: [TN] Low Temperature Alloys Hi Silvain I contacted an old friend at ESA who advised: Our spacecraft electronics are verified down to -55 degC, but I was involved with some studies at lower temps, but only our favoured materials and a Pb-free try: (See attached file: Cryogenics_48(2008)497-510.pdf) Fig 13, second block down should read 50InPb not SnPb. Is this useful? If anyone would like a copy of this document, let me know off TechNet directly. Graham N On 22 Feb 2011, at 10:35, Sylvain Kaufmann wrote: > Dear Technetters, > > I am looking for some information about solder joints / alloy behavior in extremely low temperature environment; in this particular case, for temperatures below 77K. > > I have not been very lucky so far and could not find any useful data or papers. > > Do any of you have experience with such environment? Any alloy to suggest or to stay away from? Some literature or studies that would be available somewhere? > > Thanks in advance for your help and sharing your thoughts about that cold case. > > Best regards > sylvain > > -------------------------------------------------------------------- > Sylvain Kaufmann > CERN / European Laboratory for Particle Physics > Rte de Meyrin > dpt. TE-MPE-EM > 1211 Geneva 23 > Tel: +41 22 767 37 02 > Fax: +41 22 766 87 77 > www.cern.ch > -------------------------------------------------------------------- > > > > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please contact helpdesk at x2960 or [log in to unmask] > ______________________________________________________________________ > > --------------------------------------------------- > Technet Mail List provided as a service by IPC using LISTSERV 15.0 > 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) > To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest > Search the archives of previous posts at: http://listserv.ipc.org/archives > Please visit IPC web site http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 > ----------------------------------------------------- ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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 or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/ContentPage.aspx?Pageid=E-mail-Forums for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------