Hi team - yes, Collins published the investigation of cored wire solder
shelf life paper at the SMTA ICSR Conference in 2010. Bar solder would have
an infinite shelf life. One wiggle to Victor's question would be that some
ISO9000 rules ask for a shelf life system for materials which involves the
suggested shelf life by the material manufacturer.  How you resolve your
shelf life management protocols with the suggested shelf life by the
material manufacturer can be an involved process.

Dave Hillman
Collins Aerospace


On Thu, Dec 19, 2019 at 9:02 AM Richard Kraszewski <
[log in to unmask]> wrote:

> As an FYI - David Hillman/Rockwell Collins  wrote that paper.
>
> Rich  Kraszewski
> Senior Staff Process Engineer
>
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> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
> Sent: Thursday, December 19, 2019 8:59 AM
> To: [log in to unmask]
> Subject: Re: [TN] LF Solder Bars, SN96.5AG3.0CU0.5, SAC305
>
> [EXTERNAL] This email was sent from outside of Plexus.  Use caution when
> opening attachments or links from unknown senders.
> .
> TechNetters,
> Why would ANY solder (with the possible exception of solder preforms that
> were flux encrusted) have an expiration date?  I seem to recall there being
> a paper where someone did rework with solder wire with flux in it that was
> 20 years old and there was no problem.
>
> Regards,
> Bev
>
> -----Original Message-----
> From: TechNet <[log in to unmask]> On Behalf Of [log in to unmask]
> Sent: Thursday, December 19, 2019 9:27 AM
> To: [log in to unmask]
> Subject: [TN] LF Solder Bars, SN96.5AG3.0CU0.5, SAC305
>
> Fellow TechNetters:
>
>    Does Solid Bar LF Solder Vaculoy have an associated EXPIRATION DATE?
>
> Victor,
>