Change the Pb to Sn and you have a standard Sn/Ag eutectic. Makes more
sense methinks..........
Regards
Ian Fox
Lead Materials and Process Engineer
Aero Engine Controls
A Rolls-Royce plc and Goodrich Corporation Joint Venture
York Road
Hall Green
Birmingham B28 8LN
Tel: +44 90)121 607 3763
Fax: +44 900121 6076358
email: [log in to unmask]
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman
Sent: 11 February 2010 20:32
To: [log in to unmask]
Subject: Re: [TN] Old reference for silver solder - what's it cross ref
to?
Hi Jeff - I do have a 95Pb/5Ag solder alloy in my solder alloy charts
but don't have a 94Pb/6Ag. But your logic makes the most sense so far.
Dave
"McGlaughlin, Jeffrey A" <[log in to unmask]> Sent by: TechNet
<[log in to unmask]> 02/11/2010 01:45 PM Please respond to TechNet E-Mail
Forum <[log in to unmask]>; Please respond to "McGlaughlin, Jeffrey A"
<[log in to unmask]>
To
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cc
Subject
Re: [TN] Old reference for silver solder - what's it cross ref to?
I think the 94LTS was the designation for "Low Temperature Silver
Solder"
and was 94Pb/6Ag. I have an old chart for this somewhere but can't lay
hands on it right now.
Jeffrey A McGlaughlin, CID
Engineering Designer
Battelle
505 King Ave
Columbus Ohio 43201-2693
Phone (614)424-7582
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of David D. Hillman
Sent: Thursday, February 11, 2010 2:24 PM
To: [log in to unmask]
Subject: Re: [TN] Old reference for silver solder - what's it cross ref
to?
Hi Graham - well, ya got me stumped. I have access to all of the
QQ-S-571
revisions from "B" and there is no "94" designation in the
specification.
That drawing note has to newer than QQ-S-571 Rev C, 1963, since that's
when the R-RMA-RA convention was first used. The WRAP3 is easy - wire,
RA
flux, P3 flux core but the 94 LTS is a mystery. If I had to guess, the
94
LTS is a specific supplier alloy designation that has nothing to do with
the 571 specification. And the "silver solder" reference is no help as
that could be describing a solder alloy family or could be a slang term.
Looks like someone created a drawing note mutation! Good Luck.
Dave
Graham Collins <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
02/11/2010 11:42 AM
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
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[TN] Old reference for silver solder - what's it cross ref to?
Hello Technet
I seem plagued with strange solder questions these days. Can somebody
help with a cross-reference from an old solder callout to what this
would be referred to as now? I have a drawing that references:
"QQ-S-571 alloy 94LTS Type WRAP3", and refers to it as "silver solder".
I can get the last version of QQ-S-571 (rev F, before it was cancelled
and J-STD-006 adopted), but I do not see this type of callout. Does
anyone have something that will tell me what's in this solder?
Thanks!
Graham Collins
Halifax Production Engineering
L-3 Communications ES
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