Many years ago we used a product called Ruby flux.  With this stuff, you
could solder to anything, especially stainless (we used to use it for this
application).  It does, for obvious reasons, need to get thoroughly cleaned
(water soluble) right away.  All I know is that is was pink in color, don't
have any other information, though.

Jim Marsico
Senior Engineer
Production Engineering
AIL/Electronics Systems Group
An EDO Company
[log in to unmask] <mailto:[log in to unmask]>

        -----Original Message-----
        From:   [log in to unmask] [SMTP:[log in to unmask]]
        Sent:   Friday, March 23, 2001 9:35 AM
        To:     [log in to unmask]
        Subject:        [TN] soldering to stainless

        Here is my problem. One of them anyway. We have an assembly with a
stainless
        steel pin that has a flex soldered to the end. Currently the pin is
nickel
        plated. Due to some problem which has not been explained to me very
clearly, it
        has been proposed to eliminate the nickel plate. My problem is
obvious. How do I
        solder a little flex to the end of this stainless steel pin? This is
a high
        dollar, high reliability assembly. ( Navy pilot wants this to work )
Any
        suggestions or advice are welcome. It may be posssible to have the
pin plated
        only on the area that gets soldered but I am looking at the worst
case because I
        have been around long enough to know that somebody who does not have
to deal
        with a problem can always make it harder on those who do.
        Thanks in advance,
        Charles Caswell
        Process Lead, PCB
        Frontier Electronic Systems


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