Alloy 42 has/is widely used on many electronic components. As long as 
     your lead finish is correct (i.e. correctly plated or tinned) and you 
     do not have an oxidation problem, then you should have no problems 
     soldering to those parts. Could your customer have been referring to 
     solder joint cracking problems on parts with Alloy 42 base metal? 
     Werner Engelmaier and others have published several technical articles 
     documenting the solder joint cracking problems of Alloy 42 components.
     
     
     Dave Hillman
     Rockwell Collins
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______________________________ Reply Separator _________________________________
Subject: Alloy 42
Author:  [log in to unmask] at ccmgw1
Date:    4/16/96 6:32 PM


We have a customer who says that a previous supplier had problems soldering 
some fine pitch components (15 mil) because the lead material was "Alloy 
42".  They had a tin/lead coating (85/15).  They were also told that many 
component mfgrs are going to be using this material.
     
We are not familiar with this lead material but since it is solder coated do 
not hink it should be a problem.  Anyone have any knowledge or experience in 
this area?  
     
Thanks in advance for your consideration.
     
Leo Reynolds
Electronic Systems, Inc.