This is a great time to point out that leaving guns in gun cases, especially the woolen/fleece cases, in the back of a closet, is one of the most sure-fire ways to rust the value completely out of a gun. Heating up a tank on the kitchen stove. on Introduction. It does provide good rust resistance, which is improved with oil. That surface rust on the barrel could be polished off easily. pliers, mole grips, -An old metal container (I know, a plastic container is pictured but always use a metal one) filled high enough with oil to completely submerge your steel object would be ideal. New guns are typically available in blued finish options offered as the least-expensive finish, and this finish is also the least effective at providing rust resistance, relative to other finishes such as Parkerizing or hard chrome plating or nitriding processes like Tenifer. This works well for me. There are also methods of cold bluing, which do not require heat. To heat this, I use a Coleman camp stove and a 15# jug of LPG gas. Glad that there are folks like you around. "Cold" bluing is generally a selenium dioxide based compound that colours steel black, or more often a very dark grey. Use your torch to bring up Let them cool down as you take a closer look at the bluing effect. - Ballachy", "Bluing of Steel by Heat Treatment: Why and How it Happens? The tempering reduces the amount of martensite and thus makes the steel softer. So I buffed down the barrel with steel wool and started over heating the barrel in the oven before taking it outside to add the solution (which is nitric acid). Mea culpa. (NaOH from Ebay soap supplies). It is slightly caustic, so be careful you dont leave it on the gun for long. To remove them, you put the action/barrel into a sturdy vise (padded with soft jaws) and you use a piece of brass rod to drift the sights out. Share it with us! This article was very, "I've been working with steel since I was a child, and reviewing these proper methods and skills makes my projects, "It surely educated me on several points. After 2 years ago -An old container filled with your chosen degreaser (unleaded petrol), -Your desired polished metal object/s (very important! The robot gives the steel valve seat a quick blast with liquid nitrogen and drops the seat right in place. The process was to coat the gun parts in an acid solution, let the parts rust uniformly, then immerse the parts in boiling water to convert the red oxide Fe2O3 to black oxide Fe3O4, which forms a more protective, stable coating than the red oxide; the boiling water also removes any remaining residue from the applied acid solution (often nitric acid and hydrochloric acid diluted in water). However, the chemicals from the bluing process can accomplish uneven staining on aluminium and polymer parts. I agree used oil works better and adding some copper and graphite seems to deepen the color and add more purple or plum to it. 35% Potassium nitrate (aka saltpeter), http://castboolits.gunloads.com/archive/index.php/t-36054.html. It is vastly appreciated even by those of us who will probably never use it. on Introduction, Hello my name is Joe and Im doing a project where Im trying to achieve the same outcome. Also: Do not allow the solution to run, drip or sag. Commercial products are widely sold in small bottles for cold bluing firearms, and these products are primarily used by individual gun owners for implementing small touch-ups to a gun's finish, to prevent a small scratch from becoming a major source of rust on a gun over time. The mixed fumes of the acids produce a uniform rust on the surface of the parts (inside and out) in about 12 hours. Just dont. YouTube - Nitre bluing a few gun parts. The salts will be a gooey caustic mess while theyre cold, and you MUST have covers on the tank when youre not using them, or the salts will climb over the edges of the tank and make a mess on the floor. Hopefully these concepts suggest caution and diligence for what you are doing. Do NOT wipe/touch your metal with anything after degreasing as the whole purpose of cleaning was then for nothing. Black iron wire You will need black iron wire to tie around any object you I now want to reverse the process so I can drill and tap the metal tip. After three coats, washing and drying, the finish was not too bad, considering I was (and am) a rank amateur. tighter your arc, the less the heat input will be. There are 10 references cited in this article, which can be found at the bottom of the page. "publisher": { Blue Metal Shell 13 in 1 Welding Torch Nozzle Tip Cleaner For Welder Soldering. Blue Bluing Steel To obtain oil-free steel wool, get some acetone in a container (say, an old, clean yogurt container you were going to throw away anyway). For most of the time, guns that utilize carbon steel components are the prime candidates for bluing but its totally possible to color stainless steel blue as well. A Garden Gun Cultivates a Newfound Fascination, AZ Judge Dan Slayton Refuses to Reduce $2m Bail in Flagstaff Campus Self Defense Case, State Judge Issues Order Blocking Enforcement of Illinois Firearms Ban Act Statewide, Protecting and Serving: Springfield, IL Police Seized Homeowners Gun After Investigating Her Report of a Prowler UPDATED, Chicagos Failed Mayor Lori Lightfoot Loses in Reelection EffortBadly, http://www.lowes.com/pd_188198-316-HG-66420_0__?productId=4764059, http://cdn.spectrumbrands.com/~/media/Spectracide/Files/MSDS/SpectracideStumpRemoverGranulesSDSApr15.ashx. Dont just leave them on a surface that could corrode or burn), get a new patch into the hemostats, soak, wring out, and keep going. You need to adjust the boiling point of the salts for your altitude. That means 50-60 revolutions to make a foot. Once you get the colour you want, go outside to your oil container and fully quench your object into the oil! Youre just using stump remover to do it. I wish this article had come out sooner, since I did not know that 0000 steel wool may have oil in it. And for the next (after the next) installment, how to do hard case coloring. The process isnt intended for bronze. ", not only fun, but also profitable. Dont touch the metal with your bare hands since it could cause severe burns. My apologies for the background noise in the first half of the video We had compressors running where I No one can even tell you what the heat treat is on a 1895 Mauser for instance yet we do not wet ourselves before we shoot one! [ This heating forms the blue on the plate. In the nitre bluing process, polished and cleaned steel parts are immersed in a bath of molten saltstypically potassium nitrate and sodium nitrate (sometimes with 9.4 grams (0.33oz) of manganese dioxide per pound of total nitrate). "sameAs": Then you can express blue it with a propane torch and a tank of boiling water. If you dont drain the barrel or action recesses properly before putting a barrel or action into a hot salt tank, then you will find out in a hell of a hurry as the water flashes to steam under the surface and again, splatters hot, highly caustic lye/nitrite salts all over you and your shop. "I have very limited knowledge as to how metal can be manipulated for different applications. ")You're ABSOLUTELY right. Brownells has a product that will strip blueing and rust (Fe3O4 and Fe3O2, respectively) and not corrode the underlying steel.Remove the barrel & action from the stock. Spilling salts at this temperature will instantly result in fire, because the KNO3 is a powerful oxidizer all on its own, and the added thermal energy will light anything on fire all alone. Instead of applying the acid solution directly to the metal parts, the parts are placed in a sealed cabinet with a moisture source, a container of nitric acid and a container of hydrochloric acid. Also buffing wheels pre blue. It's worth noting that there can be some additives in motor oil that release hydrocarbons when burnt which is a known carcinogens to the body (in other words: Bad Stuff!). If the magnet doesnt stick, its ready to be pulled away from the heat. ", the wrong quality steel. On this Wikipedia the language links are at the top of the page across from the article title. The ideal setup is a pair of long sleeve gloves along with splash goggles and a face mask. "@type": "Organization", For hazzalandy: carbon content has nothing to do with the color process, it is only the temperature you heat to, and to a lesser extent, the time spent hot. After spending most of his career as a firearms expert and enthusiast, he retreated to the great outdoors to raise his family in peace and quiet. Cooking off the more volatile hydrocarbons leaving the heavier ones produces a different effect yet again. Most cold blueing agents contain some selenium dioxide in them to enable to them to react at room temps. So you will get a shinier finish. By using our site, you agree to our. When putting water in your boil-out tank, use distilled water if you have water with high mineral content. "@type": "Article", to blue / heat anodize stainless steel How to remove discoloration from heat? - Forums - Miller Welding Bluing Stainless Steel: What You Can and Cant Do - Forging World Youll need some shop rolls, ranging from 180 to 400 grit (typical 4-packs are 180, 240, 320 and 400 grit, in 1, 1.5 or 2. The only way to do that is to heat it until the metal de-magnetises, quench it again, and then temper to the desired hardness. Once you see it turn golden, the process has started and colours will change fairly quickly! When youre done and have neutralized & washed off the Express Blue #1 solution, you then should spray down the barrel with water-displacing oil. Bluing also helps to maintain the metal finish by resisting superficial scratching, and also helps to reduce glare to the eyes of the shooter when looking down the barrel of the gun. You can also heat the oil to create different effects. Answer Why do you bother with all this crap?. Blued Pivot Steel A Pocket Sundial From a Broken Pocket Watch! Safety notes: Dont use an aluminum pan. With HSS you're looking for 2500-3000rpm, M35 or M42 cobalt bits 3000-3600rpm, and carbide 10k-12krpm. It will first turn gold, then orange, then red, purple, blue and then dark grey! Participated in the Explore Science Contest. The parts are then boiled in distilled water, blown dry, then carded, as with rust bluing. Excessive buffing on stainless steel could result in a grainy appearance so do it with care. This is one of the reasons rust and fume bluing are generally more rust-resistant than other methods. it takes a long time to heat up a long (ie barreled action length) tank that is, oh, three barrels wide. 2. For the process your metal should be nicely polished for the best results.The more shinier the polish the more your end result will glow. I can' You want 0000 steel wool for carding between coats. The part that is to race the other is heated normally up to about 220 especially if it is an aluminum casting like a cylinder head. The steel is also used for producing great police flashlights with awesome durability. So unless you have sufficient equipment and skill, its advised to let a professional perform the bluing for you. All tip submissions are carefully reviewed before being published. *Potassium Nitrate is an oxidizer. "Rust bluing" and "fume bluing" provide the best rust and corrosion resistance as the process continually converts any metal that is capable of rusting into magnetite (Fe3O4). This article received 28 testimonials and 92% of readers who voted found it helpful, earning it our reader-approved status. very easy way to get a blue finish on steel - Fit and Finish All blued parts still require oiling to prevent rust. Are you sure you want to heat the steel to 700F in that early step? It turns out I have. The cotton gloves insulate your fingers from the heated barrel, and they prevent oils from your skin from getting on the raw steel. Ive used this method in a pinch to make a tap from a cheap mild steel bolt to chase out galled female threads. you could also heat this size tank with anything from a hibatchi up to a Weber charcoal grill or you could put it on top of a wood-burning stove or even a kitchen stove. It had been thoroughly degreased before my first attempt, but in trying to repair a poor result, I apparently contaminated it a bit. 2 years ago, For the record The gentleman said multiple times that the plastic container shown in the pictures was just for the instructional photos and to be sure that the container is made of metal for this process, (Homer Simpson smacking his forehead: "DOH! Try it on some unimportant pieces first. DG thank you. The downsides are: the safety issue, which I laid out above, and which youve made clear. Sign up for wikiHow's weekly email newsletter. I used Brownells Plum Brown, a product that requires that the barrel be heated to 275 degrees to activate the reaction. I wouldnt use this bluing method for these items. I really appreciate you taking the time to share it DG. Cold bluing is not particularly resistant to holster wear, nor does it provide a large degree of rust resistance. Once the solution reaches its boiling point, turn down the burner to about one-third of the boiling temperature and let it stay there. "https://www.facebook.com/Shooting-Mystery-110244180901951", Follow the instructions. The blueing salt bath will be at about 286 to 292F, and as it is bubbling away, it is losing water, and the boiling point of the solution keeps climbing. Hot blueing salts attack soft solders on guns, so it isnt to be done on old shotguns and some older rifles. If you havent done it before, wait until I mention some items about it. for 6-8 hours. Usually they would pack the parts in crucibles and surround them with leather, wood, coal,bone etcThey would heat them up to 1200F to 1500F and hold them at this temp. I believe the change of color is due to a growing thickness of an oxide layer. Find many great new & used options and get the best deals for 13 in 1 Metal Shell Welding Torch Nozzle Tip Cleaner For Welder Soldering at the best online prices at eBay! However, there are certain characteristics differences between the materials so knowing clearly how to blue stainless steel is really important. journeyman. Depending on the manufacturers manual, youll have to prepare roughly 6 to 8 tanks to perform the bluing effectively and efficiently. Metal How do I do this? (meaning oxygen atoms are able to attach themselves to the outer layer of the steel)We did this with an electromagnet! 5 years ago, I found that heating will turn steel silver ~> gold ~> violet ~> blue. Picture Information. kitty litter (I would recommend the unused variety). That way, you can still use your oven for the rest of the evening. the cost of the burners or heaters to heat up all these tanks really only practical if you have natural gas available Only 3 left in stock - order soon. Please be careful with the cold bluing solutions. However, oil may spill and create a fire hazard if the steel is put into the oil too quickly. The List Price is the suggested retail price of a new product as provided by a manufacturer, supplier, or seller. The inside barrel was saved by the fact it was so full of lead fouling. This process is also the only process safely used to re-blue vintage shotguns. on Step 1. You can not do this method with Aluminium because it won't reach the temperatures required for bluing, it will just melt. Use a coffee can or similarly shaped container as your quenching chamber. In place of using a hot bath (although at a lower temperature) chemically induced method, it is possible through controlling the temperature to heat steel precisely such as to cause the formation of black oxide selectively over the red oxide. For this Instructable I'm using thread cutting oil. The potassium nitrate will liquefy at around this temperature and blue your items at a relatively quick speed. *700F is very close to the heat treatment temperature of some steels. Bluing is also used in seasoning cast-iron cookware, to render it relatively rust-proof and non-stick. My first time wasnt a stunning success. That seems wasteful. Dont. You work on nice guns! Heat the area with a torch until it stops sweating. Just remove the blue/rust, degrease, dry, then blue/card/boil-out/oil/drain. The parts are then oiled and allowed to stand overnight. Put all the components into the tank and wait for 5 15 minutes. If I remember right they then heated them up a bit and applied fish oil orignal and I think latter switching to linseed oil to protect the finish and give it that wet look. Spray down the whole barreled action with copious amounts of WD-40, inside and out. It provides the stainless steel surface with a layer of protection, giving rust and corrosion resistance while reducing potential glare as well. Historically, razor blades were often blued steel. For the color change to be uniform you have to remove the grease, oil, paint etc or it looks blotchy. I don't understand why you are submerging it in oil? Hunter Rising is a wikiHow Staff Writer based in Los Angeles. Hot NaOH is so alkaline it is great as dissolving organic materials. % of people told us that this article helped them. Still, you will find that cold blues dont last. wikiHow is where trusted research and expert knowledge come together. The loose oxide was then carded (scrubbed) off, using a carding brush - a wire brush with soft, thin (usually about 0.002in (0.051mm) thick) wires - or wheel. You need to constantly be adding in a bit of water to bring the boiling point back down into the range you need. Free shipping for many products! "https://www.pinterest.com/theshootingmystery/", WebBluing is a passivation process in which steel is partially protected against rust using a black oxide coating. ", informative and did not use technical language and concepts that would have left me floundering and none the wiser. Next, suspend the components in a cleaning solution tank to get rid of dirt, oil, grease, and crud. Ill be saving this for the future. Oil binds with the metal and prevent it from getting air/chemicals to corrode. Thermometers and stirring tools are also needed, as well as something to heat up the tanks. However, due to the unique qualities of stainless steel, you cant simply blue the material however way you like. Remember the oil is probably gonna release some smoke/fumes once the piece is quenched so as said before: please do this step in a well ventilated area. Ill go into parkerization later this week. Even a fingerprint will affect the consistency of the colour. it would appear these sights are drifted into dovetails. Can a softly tempered piece be re-tempered harder without going through the hardening procedure again? Its a good process, but it isnt a 1:1 replacement for blueing. $3.59. It is also used by machinists, to protect and beautify tools made for their own use. I've never done anything like this but want to try. We use cookies to make wikiHow great. The steel will pull some of the carbon out of the oil while quenching and harden the outer portion of the metal. JUST DONT. How to Hot Blue Steel with a Torch- A Step-by-Step Guide At 700, you start losing your blues and the steel starts becoming a wispy silvery-blue, not a dark brilliant blue. If you have very light, fine pitting, you can polish this out. LOGIX 20910 Butane Torch, Cooking Torch, Torch for Creme Brulee, Refillable, 9.6 oz, Blue Steel . Then, you can put the components back into the bluing tank and increase the temperature until you see the blued steel. Copyright 2023 Flixsterz. Heating will make the metal better in absorbing the bluing liquid. After the Civil War they switched to another process. ALL RIGHTS RESERVED. This is as deadly as the lye-based hot salts, but more for the temperature of a large batch of salts. Drift the sights back in from the right side of the barrel. 99. You can make a Caustic Soda KNO3 water bath: 65% Lye (aka sodium hydroxide) Todos los derechos reservados. Another good test for determining when the steel is ready is seeing if a magnet sticks to its surface. Add 5 lbs of regular table salt to the water. Besides those, you must also have water displacing oil and cleaning solution (Dicro-Clean 909). I pulled the temp off the top of my head. Great column, and thanks for all the responses to various questions and comments. You have a degreased gun, and now you need to get the metal hot enough that the reaction will oxidize the steel as much as possible. By the time I was done it looked like it was a beat up 5 year old gun rather than a 1930s bolt .22 that came from a scrap yard. COPYRIGHT 2021, THETRUTHABOUTGUNS.COM. It is named after the blue-black appearance of the resulting protective finish. "headline": "How to Blue Stainless Steel in 5 Easy Steps: Complete Guide", Brilliant blues. How to Blue (Bluing) Steel Using Oven Or Torch and Oil Method OOMAN 2.28K subscribers Subscribe 872 112K views 4 years ago My apologies for the background Either of these two methods is called 'hot bluing'. It is slow rust blueing. Haha. Cold blueing solutions usually just dont wear well. Use a steel tool to stir (remember the fumes). They have their place, but doing a whole gun with them isnt that place. Mix equal parts of cream and liquid Brownells Oxpho Blue. If you do not get crazy and over heat the steel there is no reason to be fearful of the process. If the solution is still boiling vigorously, then you can expect the bluing to happen naturally. The rust then turns to black-blue Fe3O4. Many double-barreled shotguns are soft soldered (lead) or silver brazed together and many of the parts are attached by that method also. Christopher Graham writes all the content and reviews on this site with the help of his team of hunters and shooters. If you are referring to torch bluing, the Referring to the post that started all of this; Dyspeptic Gunsmith says: Hot bluing should never be attempted on aluminium, as it reacts it usually dissolves in the caustic salt bath. Submerge in water and scrape edge. Degrease and heat the items to be blued in a steel pan to about 700F. It takes practice. Hardened steel prevents knife blades from dulling and tools from bending and breaking. Dont want to get any of the liquid on you its 700F. I have cut and polished 4 pieces of mild steel to demonstrate different colour stages. To shrink, I assumed you heated the steel plate only, to expand the hole in it. Put 600 grit compound on a wheel, use a little too much pressure and youll be gob-smacked at how fast it can cut material off the gun. That doesnt happen easily or by accident. "@context": "http://schema.org/", 4 years ago I thought there was something that could help improve the colors but wasnt sure until I came across this. 'Browning' is controlled red rust Fe2O3, and is also known as 'pluming' or 'plum brown'. Various processes are used for the oxidizing process. Always wear goggles and gloves when operating a propane blow torch. Bear in mind not to touch the walls of your container as you don't want to disturb the process of what's happening! Ive hot salt blued guns in a shop with the proper equipment and you can shove a river of iron through a single hot salt tank in an afternoon. You can improve your results by doing two things: 1. The parts must be observed constantly for colour change. Thank you so much for sharing such a great article. Both ingredients are super cheap. fascinated with blacksmithing, but have not had an income to even get it started. It is not nice stuff. There's also blued hardware available, like nuts, bolts, screws, and hinges. Once the steel is clean, you can begin heating it up. }. I have to finish my M76 and Galil first and buy the materials. Dont drop or try to bend the steel once its removed. Often it does provide an adequate cosmetic touch-up of a gun's finish when applied and additionally oiled on a regular basis. Most waters in the Rockies clear out to the west coast will have high(er) dissolved solids in them. Buffing wheels have their purpose, but they take real skill to use without making a mess of guns, starting with the selection of the wheel (theres, oh, at least six types of buffing wheel), choice of type of compound, choice of grit of compound, choice of wheel speed (many buffers have only one speed, and there are some jobs where you really want a 3-phase motor on your buffer with a VFD to adjust the speed down from 1800 or 3600 RPM) and so on. Pull it out of the tank and place on a drain rack. OK, Buffing wheels, which Im making their own break-out response from the blueing salt issue: Buffing wheels are useful things in a gun shop. This method was adopted by larger firearm companies for large scale, more economical bluing. For the chemical, the bluing solution should be either Oxynate No. Rust bluing is also used on shotgun barrels that are soldered to the rib between the barrels, as hot bluing solutions melt the solder during the bluing process. Even at room temperature, the salts are highly caustic and will eat into your eyes or skin in seconds not minutes. It is named after the blue-black appearance of the resulting protective finish. Use ice cubes. The plate turned blue just like you ible and I was told this was an effect of compression fitting.the rod didn't change colour even though it had the heat applied to it so was it actually the compression fit that changed the plates colour. Here is a video by Clevinger Customs illustrating it: I use the Brownells nitre blueing salts, which are a combination of sodium nitrite, sodium nitrate, and potassium nitrate. The de-greasing you do directly affects the uniformity of the browning or blueing. Salts. As mentioned, cold bluing can be done at room temperature with decent results. You can reassemble the gun after. It is caused by a layer of oxide that forms when the steel is heated.
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