We are experiencing a small but troublesome fallout from crushed pins on a PCI 
type connector. 
The connector supplier said that the nickel is the cause. The logic is that the 
nickel wears slower than the copper or gold and therefore tends to protrude and 
form a 'hook' that will snag and crush the pins. The nickel may also not be 
beveled properly because of its hardness.
The proposed test is to create a PCB out of steel with a number of bevel angles 
and 'hooks' and insert into connectors.
My understanding is that nickel is harder than steel, but does this test sound 
logical?

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