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Hot blueing is a good process, especially if you have a lot of iron to shove through the blueing process quickly. 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 think I was drinking heavily (and likely doing stupid things in my shop with high heat and flammables at the time, possibly while juggling chainsaws) at the time I made that comment - without reading carefully. Referring to the post that started all of this; Dyspeptic Gunsmith says: Thoroughly degrease the area to be reblued with acetone. Contemporary heat-treatable steels did not exist or were in their infancy. The bottom of the crucible is opened allowing the contents to drop into the rapidly bubbling water. DG thank you. The color is oxide, but I believe you can scrape it off. After Include your email address to get a message when this question is answered. It is also used by machinists, to protect and beautify tools made for their own use. It is one smoooooth profile, from one end to the other. Bluing may be applied by immersing steel parts in a solution of potassium nitrate, sodium hydroxide, and water heated to the boiling point, 275310F (135154C) depending on the recipe. I have cut and polished 4 pieces of mild steel to demonstrate different colour stages. 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. Prepare the components of the metal surface before you attempt to blue using your tools. So you will get a shinier finish. In my case I drilled/threaded the metal piece and made a holder with a threaded end. Spray down the whole barreled action with copious amounts of WD-40, inside and out. This item: Special Blue Full Metal Butane Torch (Gold) - Refillable Flame Lighter- Culinary Torch - Welding Torch - Adjustable Dual Flame for Desserts, Creme Brulee, BBQ and Baking. When polishing something like the above rifle/shotgun, youve got a pretty light coat of rust, without severe pitting. You dont want to affect the hardness of your steel in critical areas like actions, bolts, bolt lugs, barrels, chambers, etc. There are many simple ways to achieve good bluing. Ive learned a LOT. Tenifer get's up to (1077F) last I checked and was the 5th step in Glock heat treating after that they Pakerize it. ")You're ABSOLUTELY right. Im not responsible for marital discord as a result of gun projects attempted on the kitchen stove. What I forgot to mention in all of this is a detail that seems mundane, but it critically important: Wear cotton gloves. { It will first turn gold, then orange, then red, purple, blue and then dark grey! Next wash your piece in your chosen degreaser for a minute or so to get rid of all grease/fingerprints that was on the metal. Bluing, being a chemical conversion coating, is not as robust against wear and corrosion resistance as plated coatings, and is typically no thicker than 2.5 micrometres (0.0001 inches). Hot NaOH is so alkaline it is great as dissolving organic materials. Above you can see some example pictures of the colour shades that can be achieved with this techniques. Free shipping for many products! I have to finish my M76 and Galil first and buy the materials. Not only does it give you an alchemical feeling of satisfactionbut it also gives the metal a finish to stop corrosion. To harden steel, start by heating the metal directly with a blow torch until it turns a cherry red color. Hi SteelJunkee Method is as follows: Fit rod into drill and set at constant speed Clean rods with acetone on clean rag Use butane and propane mix blow torch to achieve colour range Quench in water Dry The weird thing is that they look great for around 4-5 days then deteriorate. My first time wasnt a stunning success. They should send you a stipend for your time. You should keep guns in a safe, if you can. I guess Ill have to just be happy drying toilet paper. Hunter Rising is a wikiHow Staff Writer based in Los Angeles. "mainEntityOfPage": "https://shootingmystery.com/blue-stainless-steel-beginners/", Then you pull it out and scrape off the oil along the blade edge. BUT like so many power tools on guns, it is possible to create expensive screw-ups to fix on guns with power tools, and buffing wheels are no exception. Bluing involves an electrochemical conversion coating resulting from an oxidizing chemical reaction with iron on the surface selectively forming magnetite (Fe3O4), the black oxide of iron. Now securely hold your piece with whatever you have chosen. I learned something slightly different than what you are teaching and that is I am willing to pay people like you to do this kind of stuff for me. Drift the sights back in from the right side of the barrel. First, let us go through a couple of bluing concepts that you have to know in order to achieve the desired result. Premium fencing blades are often offered with a blued finish. (And taking, out of *your* hide). Remove the bolt & trigger group this might require a pin punch on some guns to pull the trigger group.From what little I can see in the picture here . Be careful since considerable heat might be generated in the process. Its a good process, but it isnt a 1:1 replacement for blueing. The cabinet is then sealed. And then there is the difference between general care and storage vs available daily carried protection pistols living in a some sort of Holster (nylon or leather) , good, bad, take them out or leave them in? Its for mild steel, which must be greased, oiled or otherwise coated with something to stop it from rusting almost immediately. Youre a gunsmith who has a lot of nice guns! 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!). I use kerosene to wet my paper from 500 on up. The melting point for KNO3 is 633F. Blue Metal Shell 13 in 1 Welding Torch Nozzle Tip Cleaner For Welder Soldering. Should something happen, seek medical help right away. If you tempered the steel with a blow torch, set the metal on an anvil or another large steel surface to conduct the heat. Use your torch to bring up However, the chemicals from the bluing process can accomplish uneven staining on aluminium and polymer parts. | Alpha Detroit", "NRA Family | Gun Manufacturing: Browning vs. Bluing", http://mypeculiarnature.blogspot.com/2014/08/quick-rust-bluing-back-in-black.html, "Radio Kits and Designs for Old and New Styles", "Coating, Oxide, Black, for Ferrous Metals (MIL-DTL-13924D)", "Phosphate and black oxide coating of ferrous metals (MIL-HDBK-205A)", https://en.wikipedia.org/w/index.php?title=Bluing_(steel)&oldid=1142351288, Short description is different from Wikidata, Articles that may contain original research from October 2020, All articles that may contain original research, Articles needing additional references from October 2020, All articles needing additional references, Articles lacking in-text citations from September 2014, Articles with multiple maintenance issues, Articles with dead external links from July 2017, Articles with permanently dead external links, Creative Commons Attribution-ShareAlike License 3.0, This page was last edited on 1 March 2023, at 22:58. Theres a reason why I buy up clapped-out guns and stuff where people look at me with a WTF?! Process that partially protects steel against rust, This article is about the historical uses of black oxide. You can reassemble the gun after. No. If youre interested, just ask and I can provide more details. You will get it. Excessive buffing on stainless steel could result in a grainy appearance so do it with care. I like 1.5 wide shop cloth myself). Even at room temperature, the salts are highly caustic and will eat into your eyes or skin in seconds not minutes. Also: Do not allow the solution to run, drip or sag. Dont scrub the solution onto the gun, just run a patch that is not dripping wet down one complete run on the barrel/action in one smooth stroke. In the hot salt process, you will need, oh, four to six tanks, only one of which will be the heated blueing salts. I pulled the temp off the top of my head. -A heat source. The ideal setup is a pair of long sleeve gloves along with splash goggles and a face mask. Degrease and heat the items to be blued in a steel pan to about 700F. This article was co-authored by wikiHow staff writer. highfour, case hardening is a bit different from what you describe.. Usually, the steel needs some time in a medium that will allow carbon to penetrate the surface, and we are talking 15 minutes to several hours. Nowadays, even mild steel does have a certain amount of carbon in the alloy, which can explain your observations, if you google "super quench," you should find a waterbased quench that is rumoured to do the same, but in my humble opinion, water can do just that as well. Ok you gotta help me out herewhen I was studying mechanical engineering a good few years back a project I done involved using a compression fit of 1/4" thick plate steel into 1" thick steel rod, both mild steel. Make sure to check every nook and cranny of the components so that you can find any discoloration or blemishes. Heating will make the metal better in absorbing the bluing liquid. You can improve your results by doing two things: 1. Once the solution reaches its boiling point, turn down the burner to about one-third of the boiling temperature and let it stay there. Use a backing block of wood or even a Pink Pearl rubber eraser. It's easy to get it too hot, too quickly - especially with an O/A or oxy-propane torch. A non-linear resistance property of the blued steel of razor blades, foreshadowing the same property later discovered in semiconductor diode junctions, along with the ready availability of blued steel razor blades, led to the use of razor blades as a detector in crystal set AM radios that were built by servicemen (as foxhole radios) or by prisoners of war during World War II.[8]. 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. Are you sure you want to heat the steel to 700F in that early step? Also, the results you indicate are typical of still having some oil on the gun. I dont use hot salt blueing because much of my work is on older double guns, which have ribs that are soft-soldered into place. I heat treated a piece of carbon steel to make it less likely to wear (using its edge as a cutting surface in a wood turning application). They should start gassing up approximately 2 to 3 minutes after exposure. All tip submissions are carefully reviewed before being published. You need to adjust the boiling point of the salts for your altitude. "@type": "ImageObject", You can make your own desiccant packs with kitty litter (I would recommend the unused variety). The parts are then oiled and allowed to stand overnight. 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. Did you make this project? The torch comes in when you first apply the Express Blue. If there is any finish left on the metal, it will interfere with the bluing pr Besides those, you must also have water displacing oil and cleaning solution (Dicro-Clean 909). Higher carbon contents will take longer to heat. This process was repeated until the desired depth of color was achieved or the metal simply did not color further. The parts can often be put together with little or no forces need and friction lock together and the one parts shrinks and the other part expands. Shooting Mystery is reader-supported. Red rust is Fe2O3, and is incomplete rust it will continue allowing the surface to corrode over time hence the oil or wax. The steel was mild steel and had very little carbon content. But since this was my first project, with an inexpensive kit as a learning tool, and as I intend to do this again with a much more expensive kit, my trials and errors and your voice of experience will be very useful the next time around. You heat the outside member only when you do a shrink fit.). Acetone is also useful for de-greasing the barreled action. The thickness of the oxide is a function of how hot you heat the steel (The color is due to interference of light reflecting from the surface of the oxide coating, and light reflecting from the oxide-steel interface). it would appear these sights are drifted into dovetails. Where/how did you think I got to the point I could make nice guns? You can not do this method with Aluminium because it won't reach the temperatures required for bluing, it will just melt. He started the site to explore the ethics, morality, business, politics, culture, technology, practice, strategy, dangers and fun of guns. Historically, razor blades were often blued steel. "height": "800", 3. Now you can start.Apply heat to your object and heat up gently and equally. As I'm bluing round pieces I slowly and evenly rotate the piece over An ideal temperature is 180 degrees Fahrenheit but it also depends on the manual. -2x containers (one of them preferably being metal for the oil), -unleaded petrol/Acetone/Terpentine/Rubbing alcohol or any good degreaser, -metal object/s (I used mild steel, Please note this method should NOT be used on tempered/hardened steel as you will effect the properties of the metal). Alternitavely you can leave it in the oil bath to stabilize. Follow the instructions. You might also want to read our article on how to easily darken stainless steel or blacken stainless steel for more ways to personalize your gear. fascinated with blacksmithing, but have not had an income to even get it started. Either that or the steel wool. WHERE or when would the torch get used? Its nice when something can be re-used a time or two, especially when used in diversified ways. Once you get the colour you want, go outside to your oil container and fully quench your object into the oil! I wish this article had come out sooner, since I did not know that 0000 steel wool may have oil in it. These include hot bluing, cold bluing, niter bluing, and so on. Always back your paper when youre polishing over edges and up against features. Again, dont mess around with these chemicals and only handle them with extreme attention. Drill bits and gun barrels are common examples. Todos los derechos reservados. I have at least three cold blue solutions in my shop including Oxpho-blue, 44-40 and others. Dont drop or try to bend the steel once its removed. 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. Ive dealt with strong acids and strong bases in lab work, and I fear the strong bases more. Its easy enough to color metal with a torch, but it has always been a hit-or-miss process for me, and when it was a big hit, I was rarely able to re-create how it got that way. Next comes the main part. The steel is also used for producing great police flashlights with awesome durability. My current rifle builds are going to be parkerzied. I have in the past few years became more and more. This is a great source that you can learn lots of information from and I'll advise it to to a handfuls of others. "I have very limited knowledge as to how metal can be manipulated for different applications. When you add water to a hot salt tank, you get an explosion of steam, and you need to develop some skill in adding the water with a very fine copper pipe on your water hose to prevent steam blow-outs spattering salts all over you. (Its Crystalline Potassium Nitrate 100%) $6.18 You have entered an incorrect email address! This step should be done before heating the steel, as the steel should be quenched immediately after removing from heat. For the chemical, the bluing solution should be either Oxynate No. Mea culpa. When the first patch gets really funky, then drop that in your plastic garbage container (remember, these patches have been soaked in acid solutions! Below is a link to a video I found on YouTube that shows the process. "name": "Shooting Mystery", Hes claiming that method is more durable than Blue alone. $36.73. We strongly advise that you only push through with this process if you are absolutely confident that you are able to perform the necessary precautions. Keep heating the steel until you notice a blue color form on the metal. There are also methods of cold bluing, which do not require heat. Put all the components into the tank and wait for 5 15 minutes. We have all kinds of rifles and shotguns with recievers made from non-Fe alloys again we do not give it a second though or break out the hardness tester. 3 years ago Heat the gun parts. 4 years ago Blacksmith products to this day may occasionally be found made from blued steel by traditional craftsmen in cultures and segments of society who use that technology either by necessity or choice.[5]. Hot. Work on a metal or steel surface, such as an anvil, to avoid any fire hazards. The List Price is the suggested retail price of a new product as provided by a manufacturer, supplier, or seller. 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. Quenched steel is harder, but it becomes more brittle. I wouldnt use this bluing method for these items. Glad that there are folks like you around. "description": "If you want to find out how to blue stainless steel, then you've come to the right place. Fe3O4 requires chemicals and/or heat to push the iron to full oxidation. WebThe gun bluing process Start with 1 gallon of water and add it to a deep fryer that has been thoroughly cleaned. (meaning oxygen atoms are able to attach themselves to the outer layer of the steel)We did this with an electromagnet! Hopefully these concepts suggest caution and diligence for what you are doing. This will keep the bluing from adhering to the sharpened edge. Picture Information. Have proper ventilation and use proper modern safety gear! If cold bluing is the only practical option, the area should be kept oiled to extend the life of the coating as much as possible. WebStep 1: Preparing Your Materials You will need: -2x containers (one of them preferably being metal for the oil) -oil -unleaded petrol/Acetone/Terpentine/Rubbing alcohol or any good You have to apply the bluing fluid. Its a good process for processing lots of guns, but I simply cannot recommend it for people who just want to do a gun here or a gun there.. That means 50-60 revolutions to make a foot. Its durable and wears well. Once you see it turn golden, the process has started and colours will change fairly quickly! You need to constantly be adding in a bit of water to bring the boiling point back down into the range you need. THANKS DG. That way, you can still use your oven for the rest of the evening. You can then u. se a soft brush to gently remove all the residue of the cleaning solution on the components. You can blue heat-treated parts with no ill effects. For more information on using a blowtorch and protecting the steel, scroll down! "author": "Christopher Graham", 2. It turns out I have. Not blessed with a climate controlled safe. The "hot" process is an alkali salt solution using potassium nitrite or sodium nitrate and sodium hydroxide, referred to as "traditional caustic black", that is typically done at an elevated temperature, 135 to 155C (275 to 311F). The rod was heated and the plate 2" square was inserted and the rod shrunk onto it. Examples of this finish are common on older pocket watches whose hands exhibit what is called 'peacock blue', a rich iridescent blue. Safety notes: Dont use an aluminum pan. Sign up for wikiHow's weekly email newsletter. ALL RIGHTS RESERVED. Thank you all who had a part in the production of this important information! 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. I am simply trying to learn anything and everything that there is to know about it. 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. I wore latex gloves, as Brownells recommended, but used a pot holder to handle the hot barrel, and that may have been the source. I use it, oh so cautiously in making my biodiesel. Your tanks better be tight, your stands for the tanks better be rigid, youd better have top-of-the-line fire extinguishers (NB the plural) available to you. 1. You will need:-2x containers (one of them preferably being metal for the oil)-oil -unleaded petrol/Acetone/Terpentine/Rubbing alcohol or any goo

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