Eric, There is not a good metallurgical difference between soldering and brazing except for temperature. Brazes typically melt at higher temperatures than solders. But I'm sure there is some overlap between the two. mark Mark Woolley PTRL Laboratory Avaya, 1300 West 120th Ave, Area 33, Westminster, CO, 80234 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Eric CHRISTISON Sent: Monday, October 13, 2008 2:50 AM To: [log in to unmask] Subject: Re: [TN] Need soldering advice ASAP No II - tangential question.. Interesting post Mike, At the risk of going a little off topic I've never quite understood the distinction between a solder and a braze. Is there a clear cut difference in the metallurgy of the different joints? Regards, > The usual wisdom on soft solders is that they aren't very strong, so the > more ductile the alloy the less likely it is to break. This conventional > wisdom doesn't really apply to Au/Sn as it is more like a braze with tensile > and sheer about 8x 10x lead alloys. > -- Eric Christison Msc Mechanical Engineer Consumer & Micro group Imaging Division STMicroelectronics (R&D) Ltd 33 Pinkhill Edinburgh EH12 7BF United Kingdom Tel: +44 (0)131 336 6165 Fax: + 44 (0)131 336 6001 --------------------------------------------------- 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.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- 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.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------