Considering a typical thickness of Ni plating (a few microns) it well could be that the measurements should have been done with Knoop, not Vickers and probably from X-section, not surface.
Regards,
Vladimir
SENTEC
SENTEC
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-----Original Message-----
From: "Stadem, Richard D." <[log in to unmask]>
Date: Mon, 4 May 2009 16:25:10
To: <[log in to unmask]>
Subject: Re: [TN] Plating Hardness of Ni 450Hv or more
It is a hardness measurement that is typically done using a Vickers
hardness tester. The Hv number is the Vickers Pyramid number. In this
case the test is on nickel or nickel-aluminum based material, which I
assume is the nickel plating.
A good reference for the test is ASTM E92. You should verify the load
required, ie, the measurement requirement should be stated as Ni 450Hv
30, which is my guess at the proper load for a nickel finish in the 450
Hv range.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Harris Dy
Sent: Monday, May 04, 2009 4:08 PM
To: [log in to unmask]
Subject: [TN] Plating Hardness of Ni 450Hv or more
Hi,
I encountered a requirement from customer drawing saying "Plating
Hardness to be Ni 450Hv or more". Is this a standard on most of the PCB
shops? If not, please advise what in your opinion is the standard
parameter.
Thanks,
Harris
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