Ron: It is off by more than 1%. The mix can be brought back to the right percentage by adding more lead. Though I would have it confirmed by another lab before any adding of lead is made. As far as the end result joint, the joint would not be eutectic. It would be a higher temperature solder join, but not much higher. If it is shinny and smooth it should be reliable. Have all the contaminant metals checked as stated in J std 001-C and in previous mails. My two cents, Ramon > -----Original Message----- > From: Dieselberg, Ron [SMTP:[log in to unmask]] > Sent: Wednesday, December 03, 2003 10:21 AM > To: [log in to unmask] > Subject: Re: [TN] SnPb Solder pot composition. > > Yordan, What was your nominal SnPb? IPC J-001 indicates the alloy shall be within +/- 1.5% of the solder specified. Since you are close to 63/37 you should be OK if your contamination limits are under control. > If you have a copy of J-001 see para. 5.3, 5.4 and table 5-1. > Hope this helps. > > Ron Dieselberg > Trainer > CMC Electronics Cincinnati > [log in to unmask] > > > -----Original Message----- > From: Yordan Venev [mailto:[log in to unmask]] > Sent: Wednesday, December 03, 2003 7:58 AM > To: [log in to unmask] > Subject: [TN] SnPb Solder pot composition. > > > We have made a composition analysis of our solder wave solder pot and > discovered a deviation of the SnPB content. The Sn percentage had gone up to > 65.45% and the Pb content down to 34.54%. I suppose there will be a (small) > change in the constitutional behaviour of the alloy - some bigger range of > the liquid-to-solid stage. Except this, what should we be aware of in > practice in regards to solder joint quality and reliability? We continue to > maintain the pot temperature at 250 deg C (482 deg F). > > Any inputs will be appreciated! > > Best regards, > Yordan Venev > > ******************************************************** > CENTILLION LTD. > 7-th km Tzarigradsko shosse Blvd. > ATM Center > 1784 Sofia, BULGARIA > Tel. :(+359 2) 974 47 51, 965 84 95, 965 58 85 > Fax :(+359 2) 974 47 52 > mail to: [log in to unmask] > www.centillion-bg.com > > > > --------------------------------------------------- > Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > ----------------------------------------------------- > > --------------------------------------------------- > Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 > ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------