Inge,
Good questions, but I am not at liberty to give any more info.  I got as
good a quality of answers as I could expect for the information I provided.
TechNet did its thing and is better than GuessNet, which is pretty funny.
You haven't lost your edge, Inge.
Bev
RIM

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Hernefjord Ingemar
Sent: Thursday, May 07, 2009 6:19 AM
To: [log in to unmask]
Subject: Re: [TN] Nickel - again

don't, Bev, you'll get into trouble! Can you describe the part a bit better?
How many? What vibration, harmonic sinus, random or what? What freq range,
what amplitude, what density? What application? Wouldn't try to give advice
without knowing what the object is. This is TechNet, not GuessNet.
Inge 

-----Original Message-----
From: Bev Christian [mailto:[log in to unmask]] 
Sent: torsdag 7 maj 2009 12:09
To: [log in to unmask]; Hernefjord Ingemar
Subject: Re: [TN] Nickel - again

Inge,
Although my parents dubbed me Beverley, I use Bev as it is easier to spell
and I get a few less letters addressed to:
Miss, Mrs or Ms. :)

Well the part in question is not stored in N2, and is to be soldered in air
with a Rol0 flux with a conventional lead free solder paste with a
conventional lead free profile (max 245C). I don't know the exact purity of
the nickel yet. 

The resulting wetting angles are awful and this thing is supposed to see a
lot of vibration. 
Bev
RIM

----- Original Message -----
From: TechNet <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Sent: Thu May 07 02:50:01 2009
Subject: Re: [TN] Nickel - again

Beverly,

we solder to nickel daily. Watt do you want to know? There is nickel and
there is nickel. We avoid bright low P level nickel. There are two nickel
types that work pretty good, the one is a 7%P sulfamate and the other is
electroless half matte. Immediately after the nickel plating,  the parts are
put in nitrogen boxes. Soldering is done with ordinary tin/lead solder with
a in-line vapour phase machine, with a VP batch machine or simply with
soldering irons. Flux is RMA. If the nickel is old, we may need RM or a few
seconds exposure to more aggressive fluxes. We have been soldering to nickel
for decades without any serious issues. Conveyour ovens or other IR ovens
don't work very good. We have very stringent requirements on these solder
joint, have to pass helium fine leakage tests.

Inge

 

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
Sent: torsdag 7 maj 2009 01:41
To: [log in to unmask]
Subject: [TN] Nickel - again

Technetters,
Have any of you had any experience with trying to solder tin-based solders
to uncoated nickel?  What kind of flux did you use?  Do you know if the
joints had long term reliability, not just appearing to be "strong" joints
right after formation?  What about negative wetting angles causing possible
stress concentration points?
Bev
RIM

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To
unsubscribe, send a message to [log in to unmask] with following text in the
BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet
NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send
e-mail to [log in to unmask]: SET Technet Digest Search the archives of
previous posts at: http://listserv.ipc.org/archives Please visit IPC web
site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To
unsubscribe, send a message to [log in to unmask] with following text in the
BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet
NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send
e-mail to [log in to unmask]: SET Technet Digest Search the archives of
previous posts at: http://listserv.ipc.org/archives Please visit IPC web
site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815
-----------------------------------------------------

---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential
information, privileged material (including material protected by the
solicitor-client or other applicable privileges), or constitute non-public
information. Any use of this information by anyone other than the intended
recipient is prohibited. If you have received this transmission in error,
please immediately reply to the sender and delete this information from your
system. Use, dissemination, distribution, or reproduction of this
transmission by unintended recipients is not authorized and may be unlawful.

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------