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Titanium Nitride on dissimilar metals

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Here's my situation: I have an Open build in the white with a stainless steel comp.  I'm planning to send the frame and slide to H&M for black nitride and since H&M says they can't do the black nitride on stainless I'm thinking I'll send the comp and barrel to Titanium Gun for titanium nitride, but my gunsmith installed a set screw in the comp so what I'd like to do is use that hole to pin and weld the comp to the barrel, but I worry about doing the TiN coating on a barrel/comp which is half stainless, half carbon.  Does anyone have experience with this situation?  Of the smith hadn't used a set screw I'd just coat the pieces separately, then use Loctite.

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Did I misread your post? Stainless can be finished with black nitride. H&M has done stainless parts for me and they turned out great.

Edited by CCG

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Was it 4130?

 

This is what I read:

"H&M Blacknitride+™, or Ferritic Nitrocarburizing, is the thermochemical that simultaneously diffuses nitrogen and carbon into the surface of ferrous metals. "

 

The stainless used in my comp is non-ferrous.

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Stainless steel is a ferrous metal. You will be fine in having it treated by H&M. I am looking at a stainless steel gun that I sent to them to have finished and it turned out great. Non-ferrous metals are metals that do not contain iron in any appreciable amounts like aluminum, copper, lead, brass, etc.

 

You sure that your comp is stainless steel and not titanium?

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On 6/15/2018 at 3:29 PM, ltdmstr said:

They can do titanium too.  

 

I'm not sure about that.  H&M told me the Black Nitride process would eat up any Ti.  They specifically asked me to remove any Ti parts and make sure I didn't send them down.  They have no problem with carbon or stainless steel.

Edited by zzt

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