Plating 4130 parts

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?

Fortunat1 wrote in
:

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?


Actually, I was mistaken about the nickel. This is the actual process;

http://www.sermatech.com/documents/s...rmetel1207.pdf

On Aug 7, 12:32 pm, Fortunat1 wrote:
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?

Actually, I was mistaken about the nickel. This is the actual process;

http://www.sermatech.com/documents/s...rmetel1207.pdf

The described process is not plating. It is coating with an organic
polymer, vaguely similar to epoxy paint or powder/melt coating,
the modern replacements for baked enamels.

In general plating reduces the fatigue limit for parts by leaving the
surface in a state of residual tensile stress and if electroplated,
possibly also due to hydrogen embrittlement.

The described process would not appear to present either of those
problems, though it is always best to inquire with the manufacturer
for a specific application.

--

FF

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".

cavelamb himself wrote in
nk.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..

Fortunat1 wrote:
cavelamb himself wrote in
nk.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..

I repeat,

You might want to research "Hydrogen embrittlement"

to counteract it...

"cavelamb himself" wrote in message
news:cRcui.2237$zg3.1657@trnddc04...

You might want to research "Hydrogen embrittlement"

to counteract it...

The higher strength steels are often baked at 375 F, for 23 hours after cad
and electroless nickel.

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

On Aug 8, 12:35 am, wrote:
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.

I thought AN bolts were 2330 nickel steel. That's what the
textbooks say. Maybe NAS bolts are 8740?

Dan

On Aug 8, 5:51 am, cavelamb himself wrote:
Fortunat1 wrote:
cavelamb himself wrote in
ink.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...

I repeat,

You might want to research "Hydrogen embrittlement"

to counteract it...

And I repeat that the link he provided is to a process that is
not plating.

--

FF