Plating 4130 parts

On Aug 7, 11:33 pm, Fortunat1 wrote:
cavelamb himself wrote link.net:

Fortunat1 wrote:

I have access to a plating facility (aviation, but it's a jet engine
rebuild shop) where I can get my wing fittings plated. My
understanding is that 4130 cad plating is just that, cadmium and
nothing else, but this shop does it's cad plating by a coating of
nickel first and then cad plating.. I'm reluctant to do this for the
obvious reasons until I find out what the story is...
Anyone know?

You might want to research "Hydrogen embrittlement".

Yeah, I was aware of hydrogen embritlement which is why I asked, but a lot
of people seem to be doing this to things like wing attachment brackets all
the same. Seems strange that AN hardware and such can be plated when such
small pieces are taking such high loads..

Standard AN bolts are cadmium plated, and the bolts are usually made
from 8740 alloy (although they can be made from 4130) that is heat
treated to a minimum strength of 125 Ksi. So I would think that you
can have them cad plated if you use the proper process.


Bud