I agree, pre-tin the stainless steel part with a very strong flux intended 
for stainless steel, then wash it thoroughly.

http://www.ccis.com/home/hn/page27.html

http://www.solderconnection.com/specsheets/S26_Flux_TB.pdf

Karen Tellefsen - Electrical Testing
Alpha / 109 Corporate Blvd./ S. Plainfield, NJ 07080
[log in to unmask]
908-791-3069




From:   Paul Edwards <[log in to unmask]>
To:     <[log in to unmask]>, 
Date:   09/28/2012 11:29 AM
Subject:        Re: [TN] soldering stainless steel
Sent by:        TechNet <[log in to unmask]>



Torsten,

The last time I did this type of thing I did the following:

Pre-tin S/S soldering areas with the same solder metallurgy as your solder 
paste using a very active acid flux (I used a hydrobromic acid type flux), 
wash thoroughly, then place on PCB like regular component and/or RF 
shield...

Some adjustment need to be made depending (that word again...) on the 
joint configuration and part... 

Paul

Paul Edwards
Process/Quality Engineering
Surface Art Engineering


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Torsten Hagge
Sent: Friday, September 28, 2012 8:17 AM
To: [log in to unmask]
Subject: [TN] soldering stainless steel

Hi all,

has anybody experience with soldering stainless steel parts directly on a 
PCB? What solder process work fine?

Application is a medical sensor with body contacts.

Torsten


Kind regards

KRISTRONICS GmbH
Torsten Hagge
Gewerbegrund 5-9
24955 Harrislee
Telefon +49 (0) 461 7741-624
Telefax +49 (0) 461 7741-642
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