Thanks for the info. Do you know if IPC has published any info on this? thanks, Tehn Yit Chin -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Roger Bilham Sent: Sunday, July 21, 2002 9:10 PM To: [log in to unmask] Subject: Re: [TN] antimony level in wave solder bath Hello Tehn, Sb is now accepted as having no effect on formation of tin pest in normal solder alloys and a modest amount, maybe up to 0.5%, will have only marginal effect on solder wetting and joint brittleness. For more info, I suggest you look at Soldering in Electronics by Klein-Wassink (ISBN 0 901150 24 X) or the books by Howard Manko. Regards, Roger Bilham In article <[log in to unmask]>, Tehn Yit Chin <[log in to unmask]> writes >Hi, > >I recently had our wave solder bath composition analysis and it came back >with a value of <0.03% for antimony. Depending on who you talk to, it seems >that the lack of antimony can generate tin pest under low temperature aging, >and too much antimony causes brittle solder joints. Some says that antimony >should be at 0.12%. > >I am not an industrial chemist, so I am rather confuse with this. Can anyone >provide some insights or some documentations on what/why is the correct >levels? > >thanks > > >==================================================================== >Tehn Yit Chin mb: +61 418 139 181 >MILLISON TECHNOLOGY Pty. Ltd. ph: +61 3 8793 9500 >Electronics Design Services fx: +61 3 9798 7633 >http://www.millison.com.au mailto:[log in to unmask] >==================================================================== > >--------------------------------------------------------------------------- ---- >- >- >Technet Mail List provided as a free service by IPC using LISTSERV 1.8e >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/html/forum.htm for additional >information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 >ext.5315 >--------------------------------------------------------------------------- ---- >- >- > -- Roger Bilham Roger Bilham Consultancy Tel: +44 (0)20 8467 8819 Fax: +44 (0)8700 548 613 Mobile +44 (0)7 941 122 446 ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------