Thanks for all the inputs. This is a picture of a purchased item containing
multiple wires that are formed into a fusion lug at one end. The other ends
we strip and some wires are soldered into a connector and others are crimped
to pins. The wire when looking very dark (almost black) will not take
solder and we use a solder pot. We have cut back up to 12" and still found
unsolderable wire.
We now have come across wire on spools in house that is very dark in color
that was manufactured in 05 and 06 and stored in a controlled environment
for temperature and humidity here.
Main question I have is can you use wire that does not take solder for
crimping operations?
Again thanks for all the responses and will keep watching for anymore you
folks may have. Jon
-----Original Message-----
From: Dehoyos, Ramon [mailto:[log in to unmask]]
Sent: Thursday, January 18, 2007 11:42 AM
To: [log in to unmask]
Subject: Re: [TN] SHELF LIFE OF STRANDED WIRE
Older than 2 year spool of wire should still wet with no
problem. There has to be an issue, not enough heat is being used to
solder the wire, or no flux to remove the top oxide layer, real cheap
wire,... Of course the expose ends, specially if in a very humid or
corrosive environment would have to be cut off. A freshly strip wire
should have a shelf life of many years.
Regards,
Ramon
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Frederick Miller
Sent: Thursday, January 18, 2007 12:27 PM
To: [log in to unmask]
Subject: Re: [TN] SELF LIFE OF STRANDED WIRE
I would do a "dip and look" test to verify that the wire is wetting.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Jon Roberts
Sent: Thursday, January 18, 2007 11:51 AM
To: [log in to unmask]
Subject: [TN] SELF LIFE OF STRANDED WIRE
Searching for data or information regarding process control to self life
of stranded wire (M22759/32). Wire is used for both soldering and
crimping. We are considering two years from Date of manufacturing (DOM)
from vendor.
Problem being experience is discoloration (oxidation) of wire surface.
Considering also using solderablitity criteria to determine if wire is
suitable for crimping. Any help or information is extremely welcomed.
Jon
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