Fellow TechNetters,
   I am desperately search for documents/Publications/Studies on number of
insertion mating contacts will withstand.
Hard gold, Au/Ni/Cu, on PCB fingers is a robust finished.   It can with
stand hundreds of insertion cycles.   However,
FLASH, Soft Gold, will not be that reliable.   Wow about tin lead surfaces.
I know that the thickness/Purity  of the
surface plating plays a great part.   I really need HELP from the DINOSAURS
out there.   I have reviewed IPC-2221.

Victor G. Hernandez
Component/Material Failure Analysis Eng.
PS4-1, Rm. 132
Ofc:     512-725-3471
Pgr:     512-907-0005

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