Phil,
Sn100 is going to be less expensive then SAC 305. If the two get mixed at
hand soldering it probably won't create too many issues.

My first choice would be to use the same solder through-out the assembly
process because overall it would be easier.

If you want to use Sn100 for wave solder, I would do all my through-hole
touch-up and hand soldering with the same solder. That way you don't have to
worry about much mixing.

I think all flux suppliers will tell you that their flux works well in a
foam fluxer. I don't have a lot of experience but testing different fluxes
won't be as prohibitive as the last suggestion of testing different solders.

Joel Mearig
Delta Tau Data Systems, Inc.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Nutting
Sent: Tuesday, October 11, 2005 12:14 PM
To: [log in to unmask]
Subject: [TN] SAC 305 versus Sn100C

Here is my question for the afternoon,

I know the answer is "it depends", but I need some more information to
help with the decision process.

I just took delivery of a new wave solder machine set up for SAC 305.  I
have not yet purchased solder or flux.

Our CM is using Sn100C.  I know Sn100C is less expensive than SAC 305
(the IPC alloy of choice).

Is there going to be a long term issue if Sn100C and SAC 305 get mixed
together via hand soldering?

Is the Sn100C process more forgiving than that of SAC 305?

Are there fluxes out there that work better in a foam application?

I'd like to figure this out before ordering 600 pounds of bar solder.

Thanks in advance,

Phil Nutting

---------------------------------------------------
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
-----------------------------------------------------

---------------------------------------------------
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
-----------------------------------------------------