John, As you know from our past interactions I'm in your camp especially when it comes to 100%Sn. My response to Phil wasn't a suggestion that Sn100C was better than SAC 305. I was only questioning his suggestion that SAC 305 was IPC's alloy of choice for wave soldering. Regards, George George M. Wenger, Andrew Corporation Reliability / FMA Engineer Base Station & Subsystems Group 40 Technology Drive, Warren, NJ 07059 (908) 546-4531 [log in to unmask] -----Original Message----- From: John Maxwell [mailto:[log in to unmask]] Sent: Tuesday, October 11, 2005 7:03 PM To: TechNet E-Mail Forum; Wenger, George M. Subject: Re: [TN] SAC 305 versus Sn100C Alas, I wish I was consulting again as this would be money in the bank for those using 100% Sn. Brittle brittle brittle, my old Chemical Rubber handbook describes tin as the crying metal due to crystal cracking. Rel testing that I ran on both reflow and thru hole assemblies lead me to abandon Sn100 and Sn99C due to solder joint cracking so lots of luck. John maxwell Wenger, George M. wrote: >Phil, > >Did I miss something on TN? You made the comment that "Sn100C is less >expensive than SAC 305(the IPC alloy of choice)." Has the IPC come out >and indorsed SAC 305 for Pb-Free wave soldering? I know the IPC Solder >Products Value Council has indicated that "the 96.5/3.0/0.5 SAC alloy >be the lead free alloy of choice for the electronics industry" but that >was based on their surface mount assembly and reliability evaluation not >on a wave soldering evaluation. > >Regards, >George >George M. Wenger, Andrew Corporation >Reliability / FMA Engineer >Base Station & Subsystems Group >40 Technology Drive, Warren, NJ 07059 >(908) 546-4531 [log in to unmask] > > > > ------------------------------------------------------------------------------------------------ This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, please notify the sender immediately and delete the original. Any unauthorized use of this email is prohibited. ------------------------------------------------------------------------------------------------ [mf2] --------------------------------------------------- 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 847-615-7100 ext.2815 -----------------------------------------------------