I have a thick paper that holds everything about stress and creep.  Will 
take some  time to find it ( nearly one meter pile ).  You'll get it in an 
hour I hope.
/Inge




--------------------------------------------------
From: "Roger Mack" <[log in to unmask]>
Sent: den 14 April 2010 07:23
To: <[log in to unmask]>
Subject: [TN] solder creep charts

> Does anyone have a detailed solder creep graph (shear stress N/mm² vs.
> time to rupture) for tin lead solder?
> I have been using Figure 4.35 from Klein Wassink's Soldering in
> Electronics. This graph starts at a shear stress of 1.
> We have run a ProE computer model that shows a shear stress value of
> 0.6N/mm² on the connector pins of two boards that are mounted together. We
> have placed some samples to bake at the maximum service condition
> temperature to validate the computer model is realistic. It does not take
> much of an extrapolation error on a small text book graph to be off by an
> order of magnitude.
>
>
>
> Roger Mack  P.Eng.
> Manufacturing Specialist
> Parker Hannifin Electronic Controls
> Electronic Controls Division
> 1305 Clarence Avenue
> Winnipeg, MB  R3T 1T4 Canada
> direct 204 453 3339 x373
> [log in to unmask]
> www.parker.com/ecd
>
>
>
>
>
> PLEASE NOTE: The preceding information may be confidential or
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