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topic 3769

Testing ductility of nickel deposits


I would like to know if anyone has any information on procedures for testing the ductility of bright nickel deposits on steel. Thank you.

steven curtis
- long beach ca.


The best way to measure ductility is by the "Chrysler ductility method" also there is a method ASTM B489 [link by ed. to spec at TechStreet]. The Chrysler method is to plate a foil 0.001". The thickness of the foil is critical. Having too thick of a deposit you will obtain a low ductility and having too thin of a deposit you will obtain better results.

After making a foil of cut into strip the width of a micrometer jaw and fold over the foil to make a "U" shape in the jaw of the micrometer. Turning down the micrometer until the foil breaks and ductility is equal to the following: Ductility = t/2R t= thickness R= Where the foil breaks the. radius For example is the nickel thickness is 0.001" and the foil breaks at 0.005 diameter the ductility would be: D = 0.001/2*0.0025 = .2 The best nickel can be is 0.5 for obvious reasons. George

George Shahin
George Shahin
Atotech - Rock Hill, South Carolina

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