Melonite is a trade name for salt-bath nitriding, and there are other trade names of generally similar processes including Kolene, Tenifer, and Sursulf. A unique feature of salt bath nitrocarburized layers is the monophase _-Fe_N compound layer, with a nitrogen content of 6-9% and a carbon content of around 1%. Phosphate is a thin coating that offers mild protection from corrosion. which one is one better for accuracy, corrosion resistance, or just plain toughness. Generically, think of "melonite" being the process in North America and Tenifer the process in Europe. With increasing alloy content of the steel, the diffusion layer is thinner for identical nitrocarburizing parameters. Black nickel is a derivative of nickel boron. Created with Sketch. These processes are categorized as molten salt bath ferritic nitrocarburizing. Indiana Gun Owners is the most active and largest Indiana gun Community online. The nitrogen penetration into the diffusion layer provides for improved fatigue strength. Melonite is basically salt bath ferritic nitrocarburizing, also known as liquid nitrocarburizing. MELONITE, and its synonymous trade-name, TUFFTRIDE ® (or Tenifer ® ), is a relatively straight-forward, flexible process to operate and maintain, and delivers exceptionally uniform case hardening. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. Melonite is a form of nitriding so it's really asking phosphate vs. nitrided. Black Nitride. Please share your stories and who is … I know melonite is just a brand name for a particular salt bath nitride process/ product, and it works by chemically changing the makeup of the surface, as opposed to micro slick, which is … Tenifer / Melonite basically the same. What is the best treatment to use. The nitride barrel life is all dependent on how you treat it. I was impressed with the melonite's performance even with the gun shortstroking and not running as fast. Just a comment on Melonite/Tenifer etc pistol slides and visible wear - the nitrocarburizing itself is not black, just bright steel color. However, with this variant, due to the fine microporosity in the QPQ sample which causes the lubrication to adhere better to the surface, this option gives the lowest friction value. Finished steel parts exhibit a high degree of shape and dimensional stability. 8 shows the scuffing loads of gears made from various materials (6). When done properly the process infuses the surface of the metal with with a layer of nitrogen and carbon that penetrates the metal surface to a depth of 10 to 20 microns and increases the surface hardness to a Vickers level of 800 to 1500 HV. That being said, our nitride barrel life span for average use is 12,000 rounds. That being said I have an 11.5 Melonite from them and I've been happy with it. Melonite is also called Tenifer by Glock. 4. The system has many stages, from the pre-treatment-cleaning, to pre-heat furnace, to the Melonite salts, quench salts and water rinses. If a uniform running behavior is required the QP process is appropriate. Probably phosphate since it would be cheaper and for little it would be shot it would do perfectly well. Having said that, I'd take the nitride/Melonite/QPQ over an untreated or unlined barrel. SNC = salt bath nitrocarburized, Your list is empty, add products to the list to send a request, Increased Fatigue and Rolling Fatigue Strengths, Further Decreased Coefficient of Friction, Enhanced Corrosion Resistance (Not suitable for stainless). I've been perusing the PSA rifle build kits lately considering putting together another rifle, just to have. Nitride is significantly less expensive and less time-consuming for making barrels. Nitride vs Chrome Lined Nitride/Melonite Coating, Arguably Better Than Chrome Lined. Fig. 7 shows the coefficient of friction both under dry conditions and after lubrication with SAE 30 oil, measured by an Amsler machine. The thickness for most applications is around 0.0004-0.0008″. The MELONITE® Nitrocarburizing Process. Austenitic steel containing 18% chromium and 8% nickel had the lowest resistance to galling, however, after nitrocarburizing its resistance was raised almost five-fold. Naturally, the alloy of the substrate will influence which properties are principally affected and to what extent they are affected. With alloyed steels which contain nitride-forming elements, the formation of stable nitrides or carbonitrides takes place in the diffusion layer independent of the cooling speed. But there's still that "mil spec" thing that keeps me eyeballing chf chrome lined barrels. Mine also specifically said Melonite, instead of Nitride though I know they are just different names. They are "brand names" to the process. Melonite and nitride are the same thing and better than phosphate. Nitriding is a surface treatment that increases surface hardness and corrosion resistance of steel when done correctly. Similarly, nitride and melonite are the same thing. Nitride/melonite (ferritic nitrocarburization) is a case-hardening process that leaves a shell several thousandths of an inch thick that is in the 60's or 70's HRC. What barrel treatment is better then another? The nitride layer is composed of two principle zones. Without getting too technical, It is a heat treatment that hardens the metal without adding another layer to the material, like chrome lining does. Mega has 416R stainless barrels that are nitride treated. Resulting properties from these chemical and structural composition changes are increased surface hardness, lower coefficient of friction, enhanced surface lubricity, improved running wear performance, increased sliding wear resistance, and enhanced corrosion resistance. Depending on the initial structure and composition of the core material, the nitrogen in the diffusion layer is dissolved in the iron lattice and/or precipitated as very fine nitrides. Influence of chromium on diffusion layer hardness and total nitration depth in various 0.40-0.45% carbon steels, With unalloyed steels, the nitrogen is dissolved in the iron lattice. Corrosion resistance of unalloyed and low alloyed steels is greatly improved. Melonite and nitride are the same thing and better than phosphate. Melonite/Nitriding is a heat treating process done to steel and a few other metals. For a better experience, please enable JavaScript in your browser before proceeding. Treatment durations of 1-2 hours usually yield compound layers about 10-20 _m thick (0.0004 – 0.0008″). It is a single process versus chrome which requires both chroming and the phosphate processes. The lowest friction level occurred when nitrocarburized QPQ is lubricated. Be sure to check out our gun classifieds where you can buy, sell or trade your gear. Is Nitride the same as Melonite, Isonite, Fenocite, QPQ? Can employers legally make a flu or covid vaccine a requirement for continued employment. Ferritic nitrocarburizing or FNC, also known by the proprietary names Tenifer, Tufftride and Melonite as well as ARCOR, is a range of proprietary case hardening processes that diffuse nitrogen and carbon into ferrous metals at sub-critical temperatures during a salt bath. The diffusion zone demonstrates a decreasing gradient concentration of carbon and particularly nitrogen as the gradient extends deeper into the surface of the substrate. Other methods of ferric nitrocarburizing include gaseous process such as Nitrotec and ion (plasma) ones. You must log in or register to reply here. See our review here: Toolcraft Chrome Phosphate BCG Review. Melonite vs. Chrome Lined Longevity ... unlike chrome, so you can make the barrel the exact size you want and then nitride it, vs chrome where you need to oversize the barrel/bore and then try to make the chrome the right thickness to get the right final dimensions. Black Nitride is more than just a baked on coating such as Cerakote (I have nothing against Cerakote, as I have 2 rifles with it). Zone 2, called the diffusion zone, extends to a case depth of ~.004″ to 0.008″. This property yields a tough outer surface or shell, yet alloys the material to retain ductility, thereby lending to the overall strength of the material. Quench polish quench, or QPQ, is always used in the Tufftride™, Tenifer™ and Melonite™ processes. Above: Toolcraft BCG with Black Nitride finish. Armornite® finish is a hardened nitride finish that provides enhanced corrosion resistance, greatly improved wear resis-tance, decreased surface roughness, reduced light reflection and increased surface lubricity. Display Modes: Linear Mode. Created with Sketch. After a 90 minute treatment the total nitrided depth is about 1.0 mm (0.040″) on unalloyed steel, but barely 0.2 mm (0.008″) on a 12% Cr steel. It has been determined that, unlike with chrome surfaces, the coefficient of friction of nitrocarburized QP and QPQ treated surfaces remains constant, even at varying sliding speeds. When applying, the material is first coated … It improves: (DL) Diffusion Layer – Contains nitrogen, either dissolved in the iron lattice and/or precipitated as very fine nitrides. Without lubrication the nitrocarburized QP had the lowest coefficient of friction, being less than half of that of the hard chrome or case hardened surfaces. The biggest thing I hate about Palmetto is how vague they are on their barrels. Melonite Nitride vs Chrome Lined. In metallographic analysis the compound layer is clearly definable fron the diffusion layer as a lightly etched layer. During nitrocarburizing, a two-part surface layer is formed, initially an outer compound layer, followed by a diffusion layer below it. SNC = salt bath nitrocarburized. Moderator Tools: Show Printable Version. Black Nitriding is a chemical process (in a salt bath) that infuses carbon and nitrogen into the metal, and the black color being a … Phosphate is just fine, requires plenty of lube, but will last a long time. Better for the purpose of just having? If you could get a nitrided barrel for the same price, I'd opt for one of those (shooting out a nitrided barrel would be quite a feat) but to build just to have, phosphate. Brand names / protected territories / trademarks / etc etc. Melonite is a patented thermochemical treatment used for improving the durability and corrosion resistance of barrels. As stated above, chrome lining is a known quantity. Fig. (See Fig. Depending on your choice of dimensions, this is likely to be more accurate. Melonite ® case hardening involves a QPQ ® diffusion process that creates a highly uniform and stable surface that’s significantly harder than untreated iron or steel. 11C2P '83-'87 Airborne Infantry. QPQ begins with the standard salt bath nitrocarburizing cycle to produce the protective layer of iron and iron nitride. The QPQ sample, with its extra post-oxidation step, has a much higher friction value than the QP specimen, which had part of its original oxidation in the compound layer removed by lapping. A two-part nitride layer consisting of a monophase compound layer and a diffusion layer is formed Total depth ranges from 0.008-0.040″, depending on the composition of the base material and treating time. Higher alloys give greater hardness with thinner layers. Due to the diminishing solubility of nitrogen in iron during slow cooling, _’-Fe4N nitrides are precipitated in the outer region of the diffusion layer, some in form of needles, which are visible in the structure under the microscope. 3 illustrates the influence of chromium on the hardness and depth of the diffusion layer in steels with a carbon content of 0.40 – 0.45% after 90 minutes treatment at 580°C (1075°F). Melonite is a form of nitriding. It was established by applying increasing pressure to the flank tooth until galling occurred. Nitride is a chemical treatment of steel that hardens the steel quite a bit (just the outer layer) and leaves a very smooth finish that has some built in lubricity, still needs lube just not quite as much. What Happens to Trump Between Now and Inauguration Day? All samples were lapped to a roughness of R_ = 1_m after their respective surface treatments and before testing. Thickness of compound layes obtained on various materials as a function of nitrocarburizing duration. During these processes, nitrogen, carbon, and small amounts of oxygen are diffused into the surface of the steel, creating an epsilon iron nitride layer (e – FexN). Also known as Melonite, Salt Bath Nitride or simply Nitride, this is a heat treating process that creates a case hardened surface by diffusing nitrogen into the metal surface. These results show the direct effect of increased oxidation as it relates to friction on the surface of the nitrocarburized samples. Just because a barrel is stainless doesn't mean that it can't also have a nitride treatment. Hardness in the compound layer ranges from approximately HV 700 on alloyed steels to about HV 1600 on high chromium steels. During the MELONITE process, which takes place between 900°F and 1075°F, the metal surface is enriched with nitrogen and carbon. The nitrogen-rich inter-metallic compound layer mainly contains iron-carbonitrides and, depending on the type and proportion of alloying elements in the base material, special nitrides. The hardness of the compound layer measured on a cross-section is around 700 HV for unalloyed steels and up to about 1600 HV on high chromium steels. From what I can tell, these are all budget kits with no premium features, so all are without chrome lining. Low alloy steels give thicker layers with lower hardness. This one wasn't a Freedom series, so I think there is a difference. DLC is applied on top of the surface of the part and is very hard (diamond-like), I forget the HRC value, but it's harder than nitride/melonite. By any black finish layers, with their higher level of nitride-forming alloying elements influence, to pre-heat,... Greatly improved of epsilon iron nitride with about 6-9 % nitrogen and carbon behavior is required the QP process very... 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