B-488 Type = gold purity.
Type I = 99.7%
TypeII = 99.00%
TypeIII = 99.9%

B488 is an electroplated gold spec.

I don't have a copy of the nickel spec, sorry.  All are available on line at
www.sae.org

pete

>From: John Parsons <[log in to unmask]>
>Reply-To: TechNet E-Mail Forum <[log in to unmask]>,              John Parsons
><[log in to unmask]>
>To: [log in to unmask]
>Subject: [TN] ASTM Specification Reference Required
>Date: Thu, 20 Jan 2005 08:50:49 -0800
>
>Good morning all,
>
>We are quoting on a job (PCB Fab) and the specifications reference the
>following ASTM Specifications;
>- B689-97, (Nickel Plating) Type 1 or Type 2 plate, min thickness 3 micron
>-B488-01, (Gold Plating) Type I or III gold, min thickness 0.3micron.
>
>I do not have ready access to copies of the ASTM specs.  Can anyone cross
>these to equivalent IPC spec's or at the least, interpret these for me into
>PCB speak :) .
>
>Regards
>John Parsons
>
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