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Gunsmithing Custom Actions Melonite G2G List

idahoshooter

Private
Minuteman
Jul 18, 2008
42
1
Idaho
Sorry guys didnt see it when I searched. Anybody have the thread (or remember?) which custom actions were g2g for melonite/nitriding? I know some were ok and some were not. Thanks.
 
Re: Custom Actions Melonite G2G List

Actions made from 416 Stainless or 4130 chrome moly would be drawn back in hardness if taken up to the 900 degrees in the salt bath nitriding process and would loose hardness and core strength if put through this process. Seeing as how 17-4 is hardened at 900 degrees I would think it acceptable to do the salt bath nitriding on that material. I am not an engineer or heat treating specialist so you should consult a professional.

Barrels being in the annealed condition (taken to 1500 degrees) the 900 degrees does not adversely affect them and the nitriding process is OK.
 
Re: Custom Actions Melonite G2G List

Guys,...do your research. Salt bath nitriding is old news and their are better forms of nitriding commercially available that work at lower temperatures.

Melonite is just a trade name.
 
Re: Custom Actions Melonite G2G List

Much appreciated C. Dix. Just wondered if any of you guys knew offhand. As I remember Stiller advised against and Bighorn & Bat said it was ok. Couldnt remember what any of the other makers said. Guess I should probably go pick up the phone at lunchtime one day.
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: idahoshooter</div><div class="ubbcode-body"> As I remember Stiller advised against and Bighorn & Bat said it was ok. </div></div>
This is AJ Goddard of Bighorn Arms and I also advise against altering the heat treatment of one of our actions. Our actions are 416 SS and the 900 degree salt bath process will anneal the action.
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Will know soon enough. Have a Bat being cooked as we speak.

Expect it back late this week/first of next.

Ill share the results. </div></div>

You won't be disappointed Chad. I've had several Bat's done with excellent results. Just wish the bolt handles were welded on instead of brazed so I could have them done as well.
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Emouse</div><div class="ubbcode-body">Guys,...do your research. Salt bath nitriding is old news and their are better forms of nitriding commercially available that work at lower temperatures.

Melonite is just a trade name.</div></div>

Like what? I've looked for other alternatives that'll extend barrel life like melonite with no luck.
 
Re: Custom Actions Melonite G2G List

I guess I don't understand what benefit nitriding the action is supposed to provide. I have all my barrels done and the benefit is clear there.
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: AJ Goddard</div><div class="ubbcode-body">Actions made from 416 Stainless or 4130 chrome moly would be drawn back in hardness if taken up to the 900 degrees in the salt bath nitriding process and would loose hardness and core strength if put through this process. Seeing as how 17-4 is hardened at 900 degrees I would think it acceptable to do the salt bath nitriding on that material. I am not an engineer or heat treating specialist so you should consult a professional.

Barrels being in the annealed condition (taken to 1500 degrees) the 900 degrees does not adversely affect them and the nitriding process is OK. </div></div>


Do you think any specific type of barrel or material (SS vs CM) and cut vs button rifled would matter when considering having the barrel nitrided? Would additional stress relief be in order?
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RWSGunsmithing</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Will know soon enough. Have a Bat being cooked as we speak.

Expect it back late this week/first of next.

Ill share the results. </div></div>

You won't be disappointed Chad. I've had several Bat's done with excellent results. Just wish the bolt handles were welded on instead of brazed so I could have them done as well. </div></div>


A bolt would be a bad idea. A bolt/receiver needs to have different hardness levels to prevent galling. 5 points min. I like em around seven if possible.

Failure to do this results in horrible lugs in short order.

C.
 
Re: Custom Actions Melonite G2G List

Interesting. I asked Defiance and they said, "do the bolt, but not the action body."
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RWSGunsmithing</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Will know soon enough. Have a Bat being cooked as we speak.

Expect it back late this week/first of next.

Ill share the results. </div></div>

You won't be disappointed Chad. I've had several Bat's done with excellent results. Just wish the bolt handles were welded on instead of brazed so I could have them done as well. </div></div>


A bolt would be a bad idea. A bolt/receiver needs to have different hardness levels to prevent galling. 5 points min. I like em around seven if possible.

Failure to do this results in horrible lugs in short order.

C.
</div></div>

If this is the case why is my buddies custom STI 2011 pistol not galled up? It was melonite treated and now has over 10K rounds through it and it is just as tight as when it was first built.
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RWSGunsmithing</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Emouse</div><div class="ubbcode-body">Guys,...do your research. Salt bath nitriding is old news and their are better forms of nitriding commercially available that work at lower temperatures.

Melonite is just a trade name.</div></div>

Like what? I've looked for other alternatives that'll extend barrel life like melonite with no luck.</div></div>

PM me to discuss please.
 
Re: Custom Actions Melonite G2G List

The materials in the Defiance actions are 4340 in the bolt and I believe 416R or 17-4 in the receiver, I forget which.

I do remember (when I put my UGSW action into the Rockwell tester) the bolt head is about 4-5 Rockwell C scale points harder than the receiver's lug abutments were.

Doing the receiver instead of the bolt on a Defiance really shouldn't matter. The surface gets extremely hard, more than a 10 point shift in the C scale for melonite. The bolt makes more sense to do in that case though.

I do agree with AJ as well, the effects on the material are not insignificant depending upon what alloys are in question. You can seriously screw stuff up with this process... if in doubt in ANY WAY, call the part manufacturer before you do anything.

I like AJ's NP3 coated bolt body a lot, I have his action and it is one of the smoothest modern custom actions that I've ever handled or owned.

The UGSW action is a close second, and I did not coat that. A friend of mine has one of Mark Gordon's Alpha II's with everything melonited.

I have been highly impressed with the cosmetics of that coating and the action is holding up extremely well. With Mark's LBC mod it is hard to say which is smoother, the treated or untreated action. Time will tell, at this point only about 1000 rounds are through the gun.

 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Adam B</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RWSGunsmithing</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Will know soon enough. Have a Bat being cooked as we speak.

Expect it back late this week/first of next.

Ill share the results. </div></div>

You won't be disappointed Chad. I've had several Bat's done with excellent results. Just wish the bolt handles were welded on instead of brazed so I could have them done as well. </div></div>


A bolt would be a bad idea. A bolt/receiver needs to have different hardness levels to prevent galling. 5 points min. I like em around seven if possible.

Failure to do this results in horrible lugs in short order.

C.
</div></div>

If this is the case why is my buddies custom STI 2011 pistol not galled up? It was melonite treated and now has over 10K rounds through it and it is just as tight as when it was first built. </div></div>

I have always been told by engineers you need at least 5 points of Rc difference to prevent galling. I have measured a number of actions that do not have this difference, in fact most bolts and actions are about 40 Rc. But I have also seen quite a few of these same action that were galled up. In my Bighorn Arms action I look at what has worked for the military in the M16 and went with 9310 Vacuum Arc Remelt steel. This is a very high purity low carbon steel that is then carburized to give a surface hardness of 58-60 Rc but has a tough core of 38 Rc. I then have it coated it with the Robar NP3 coating to prevent rusting. This gives me about 20 Rc difference in hardness and they have been preforming beautifully. I believe Chad has done his research and is on the right track. I may just have to try the Melonite process out on my next barrel.
AJ
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Adam B</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: RWSGunsmithing</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Will know soon enough. Have a Bat being cooked as we speak.

Expect it back late this week/first of next.

Ill share the results. </div></div>

You won't be disappointed Chad. I've had several Bat's done with excellent results. Just wish the bolt handles were welded on instead of brazed so I could have them done as well. </div></div>


A bolt would be a bad idea. A bolt/receiver needs to have different hardness levels to prevent galling. 5 points min. I like em around seven if possible.

Failure to do this results in horrible lugs in short order.

C.
</div></div>

If this is the case why is my buddies custom STI 2011 pistol not galled up? It was melonite treated and now has over 10K rounds through it and it is just as tight as when it was first built. </div></div>

Damn you Chakka!
smile.gif
(I've been dying to use that)


I don't profess to have a crystal ball or a line of credit with a Witch Doctor.

I have no idea why your buddy has a pistol that works. I hope it keeps working. Time will tell.

What I can tell you is Mechanical Engineers often drive me nuts (when they are young especially) but the kind of education they have doesn't come cheap and <span style="font-style: italic">quite often they end up being right.</span>

"5 points minimum. Seven is better." If I'd heard this once I'd of likely stored it in my hard drive and stewed on it. When I hear it a dozen times over 10 years it moves from a temp file to my primary operating system.

When the materials are of the same hardness, they chew one another to bits when loaded in both compression and shear. The designers of the minigun found this out in short order. The solution ended up being to silverplate the high wear parts. Once they did this the problem went away and the gun went bezerk.

Bo Clerke, owner of Clerke International in Raton, NM is a sharp ol cat (60+years at this stuff) and he hasn't told me a fib yet.

Good luck and hope this helps.

C.
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body">

I have always been told by engineers you need at least 5 points of Rc difference to prevent galling. I have measured a number of actions that do not have this difference, in fact most bolts and actions are about 40 Rc. But I have also seen quite a few of these same action that were galled up. In my Bighorn Arms action I look at what has worked for the military in the M16 and went with 9310 Vacuum Arc Remelt steel. This is a very high purity low carbon steel that is then carburized to give a surface hardness of 58-60 Rc but has a tough core of 38 Rc. I then have it coated it with the Robar NP3 coating to prevent rusting. This gives me about 20 Rc difference in hardness and they have been preforming beautifully. I believe Chad has done his research and is on the right track. I may just have to try the Melonite process out on my next barrel.
AJ </div></div>


Everyone do yourself a favor and listen to your elders.

C.
 
Re: Custom Actions Melonite G2G List

The deal on hardnesses

This 5 point difference tends to relate to using the same material. Using 4140 on 416 doesnt really apply that way. 416 steels DO NOT want to be tempered in the 750 - 1000 range. It leaves the material in a brittle state. Some materials are much worse for galling too. 17-4 is about the worst material for galling. We quit using 17-4 in all of our actions mainly for that reason. 416 is much better. A 38Rc alloy bolt on a Rc40 416 receiver wont gall very easily. A 38Rc bolt on any 17-4 receiver will gall much faster.

As for melonite, if you coat one side, it most likely wont gall. If you coat both sides, it probably cannot be made to gall if you try. The coating stops it. We melonite all of our tooling and gauges to check holes so they dont ever gall. The only 416 receiver I have ever melonited is a rimfire and the big P1000 as an experiment. There is so little stress in either that I didnt worry about it, but I kept them and dont sell them either. 4140 bolts need to be done at 950 F max. Brazed on handles should be OK for most alloys if they are not banged in the process. Follow Bats instructions for doing it, if they are using 17-4, it shouldnt hurt them though and will mucho help on the galling. If they are 416, I wouldnt do it.
 
Re: Custom Actions Melonite G2G List

BAT ok'ed my 3 lug chrome moly for melonite.
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Listen to elders 2x?
smile.gif


</div></div>

Clarify. Am I now considered an elder?? I am not that damn old.
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Stiller</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Listen to elders 2x?
smile.gif


</div></div>

Clarify. Am I now considered an elder?? I am not that damn old.</div></div>

Jerry

It's not the number in years, it's the mileage.

And I concurr with everything Jerry has said about Melonite.

I don't want to see any of this 3X crap for the more experienced among us, Chad.
 
Re: Custom Actions Melonite G2G List

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Dave Tooley</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Stiller</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: C. Dixon</div><div class="ubbcode-body">Listen to elders 2x?
smile.gif


</div></div>

Clarify. Am I now considered an elder?? I am not that damn old.</div></div>

Jerry

It's not the number in years, it's the mileage.

</div></div>

and that is supposed to make me feel better???

PS. give me a call on my cell.