Leo,
Alloy 42 is an Iron-Nickel alloy with properties similar to Kovar. If this base
metal is exposed you will have a very difficult time trying to solder to it. So
the thickness of the outer plating finish, the solderability of the outer
plating finish, and the use of barrier layers of plating to prevent exposure of
basis metal are important to successful implementation.
Tom Carroll
Hughes Aircraft Company
[log in to unmask]
_______________________________________________________________________________
Subject: Alloy 42
From: [log in to unmask] at CCGATE
Date: 4/16/96 4:49 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.
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