Scary! How can you guarantee the temperature won't get close to reflow of
the high temperature alloy? As I noted previously, I find it easier to
create good thermal isolation than to split hairs on the thermal model of an
area which gets anywhere near reflow.
Wayne
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of McGlaughlin, Jeffrey A
Sent: Wednesday, April 01, 2015 1:17 PM
To: [log in to unmask]
Subject: Re: [TN] HIGH Temperature Solder
Cost is not a primary concern(to be spoken like a true government
contractor) ;-D
The final product is considered Life Support/Mission Critical and failure is
not acceptable.
This design however is pushing the limit of what I consider solderable. I
have recommended We review a press-fit for production on it but and getting
pushback from the Mech Eng.
Jeff
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Joyce Koo
Sent: Wednesday, April 01, 2015 12:59 PM
To: [log in to unmask]
Subject: Re: [TN] HIGH Temperature Solder
come on, Jeff, you can always go after Au-Sn...
jk;-)
> Hi Jeff - here are a couple of other choices:
>
> 10Sn88Pb2Ag
>
>
>
> 1Sn97.5Pb1.5Ag
>
>
>
> 97Pb3Ag
>
>
> Nothing wrong with you 90Pb10Sn either. Make sure you select a flux
> core that has good thermal stability as your soldering temperatures
> are much hotter than what you deal with when using the Sn63Pb37 alloy.
> Also consider what the cleaning (or not cleaning) issues you may have
> to deal with.
>
>
> Dave Hillman
>
> Rockwell Collins
>
> [log in to unmask]
>
> On Wed, Apr 1, 2015 at 9:20 AM, McGlaughlin, Jeffrey A <
> [log in to unmask]> wrote:
>
>> I need to spec a high temperature wire solder for hand soldering. I
>> need to have a solidus of greater than 250 degrees C. Is 90Pb10Sn my
>> best/only choice or is there something else I should look at?
>>
>> Jeffrey McGlaughlin, C.I.D.
>> Engineering Designer
>> Avionics Systems & Tech Refersh
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