Through Hardening. It is a medium-sized hardenable steel. Through hardening occurs via heat treatment of medium and high carbon steels (>0.25% carbon). If the Manganese has work-hardened in service (such as may likely be encountered in repair jobs), cut away the hardened surface. You get the idea. Tempering is always conducted at temperatures below the low critical point of the steel. A It has generally supplied hardened and tempered in the tensile range of 850 - 1000 Mpa. MSC Industrial supply is here to support all your metalworking and maintenance repair needs with over 1 million products in stock and ready to ship today! 4140 typically is a through-hardening steel that is oil quenched and tempered to the desired Rockwell hardness. Contact Pennsylvania Steel Corporation today to learn more about FLEXOR and its advantages over 4140 steel. MSC Industrial supply is here to support all your metalworking and maintenance repair needs with over 1 million products in stock and ready to ship today! It can be easily mach. 12L14 is a free machining mild steel and cuts with outstanding surface finishes. The chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. The counterbores, drills and taps you already have will work in 4140 pre-hard. Download Step 1: Bend Rods Make sure that the environment safe and clear from any potential hazards. TEMPERING Temper immediately after quenching, before the part has cooled to below 150 F. Parts should be held 1 hour per inch of thickness, 2 hours minimum. Buy Hardened Hard Chrome Steel Round Plated Bar Stock directly with low price and high quality. First, ovens heat the steel above its critical temperature, which lies between 1500F-1900F depending on alloy. I would heat it up, immerse it in the Kasenite in a shallow steel dish, then bring the WHOLE dish of part and kasenite, back up to orange heat for a couple minutes. Answer (1 of 2): C. O.42% Cr; 1 mo0.25 4142 Product Guide Applications | Mechanical and Chemical Data | Tolerances Overview A medium carbon alloy steel with excellent toughness, ductility, wear resistance, and strength, 4142 is popular for a wide range of applications. per day Delivery/Turnaround Time 3 to 5 days 4140/42 PH. 4140 HT is supplied in many forms such as hot rolled or turned, ground and polished rounds and DCF plate to be used as a holder material for high strength structural components. alloys. 240-300 HB - Normalized. This steel has good workability and small processing deformation. "Tool Steel Progress in the Twentieth Century." In The Iron Age (1930): 1672-1676. Temper the steel by baking it at 325 degrees until it becomes a light straw color. specimen hardened and tempered; Electrical Resistivity, specimen hardened and tempered; Place the bucket near your work area, and pre-heat the baking oven to 500 degrees. Many types of steel have a beneficial response to a method of heat treatment known as quenching. But it should be tempered for any heavy use. Whether you put the steel plate in the etching acid face-up or face down, suspend it off the bottom of the container in some fashion. For light tapping work on body sheet metal it should be alright but I do think that most hammers are made out of a "S" series tool stool. While still black-hot, scuff the tip of the chisel with an 80-grit abrasive wheel on a bench, belt or right-angle grinder so you can see the shine of the steel. On most any med carbon alloy steel you can bring it up to about 1400* and hold it for a couple hours and end up with a Brinell slightly over 200. Peen the welds while hot. The hardness of these steels depends on the heat treatment: 195 HB - Anealed. Marquench Hardening Available in Salt-to-Salt or Furnace-to-Salt. When welding 4130 and 4140 steel, holding the weldment at the preheat temperature for some time after welding, followed by covering the weldment in ceramic insulation, is beneficial because this allows the diffusion of hydrogen from the weld metal and the heat-affected zone (HAZ). 4140 PREHARD is heat treated to a medium hardness (HRC 28/32) and is designated as 4140 HT. Can you quench 4140 in water? For 4140 steel, the recommended heat . When the metal burns a deep red, submerge it in the oil. Tempering at 400F for and hour or two and let cool in air should bring the hardness down to about 40RC. Welding. Properties of Alloy Steels 4140 and other related metals. Use cutting speeds similar to A-2 with coolant or cutting oil. Tempering Tempering temperature of 4140 alloy steel can be from 204-649 C (400-1200F) after normalizing and oil quenching, and the corresponding Rockwell hardness can be obtained. The steel is now at its maximum hardness but is very brittle. Of course it could have also been cased and then it would easily go to 60+ at the surface. . Your second best bet is a thin case hardening with Kanenite.. Supply capacity 5000 Ton/Tons per Year. Heat Treatment Soft Annealing Forging. The main difference of the two, however, is that the 4140 can be rather soft unless it's oil-hardened. The 4140 steel is an iron alloy that shares quite a number of similarities to the S7 steel. Fill a heat-safe container with water or oil deep enough to submerge your steel. What you really need is an angle grinder, and this video will show you how to use one of the powerful power tools to cut a hardened steel ring. I would recommend tempering at the lower temperature, checking as-tempered hardness and retempering at a higher temperature if needed. Quench into 150 F oil. Then apply a "butter-coat" of 307 stainless. The grade is especially suitable for forging because they . [2] Mathews, J. Tap the container holding the chemical bath periodically to keep the solution agitated. [1] Tweedale, Geoffrey. via torch of 4140. very easy to do in the shop w/out a furnace. This makes the S7 more preferable for some bladesmiths. It is not abrasive and will tolerate deep and heavy cuts, even without lubrication. How can I Harden 4140 at home? . Lost my spec sheet on 4640, but 4140 heated this way will harden up to Rock c 55-60. Planewood, If you're after down and dirty, you might want to try 4140 or 4640. To do the sharpening, I have a 7 tile cutting blade set up in my table saw: This blade is not ideal for sharpening carbide, as the diamond particles are a bit too large to do a good job. Use a very hard grade of carbide that can handle the heat without deformation. The 4140 will get mid 50s max on the Rockwell "C: scale unless it is run through a carburizing process. Unless there's some reason for a full anneal, the safest thing to do is a subcritical anneal. For your NEXT hammer, 4140 would be a good deep hardening material. anything with a thickness of about 1/4 or less i heat 2-3 minutes soak time at bright orange .up to 1/2 maybe 6-7 min. Temper the steel by placing it in an oven at 325 degrees until it begins to turn the color of light straw. Prepare the necessary tools for the procedure. . In this video we give some basis on how to get some 4140 alloy steel hardened and then temper to different hardness, we will perform our test using a Rockwel. It makes good dies because it doesn't work harden. Pack Hardening 4140 steel. A. coating designed for hard milling or high-temp. Let's take a closer look at 4140 annealed, hot or cold-rolled steel and see why it's such a valuable material for oil and gas applications from wellhead to downhole. 4150The same as "ordnance" steel but with the carbon content upped to 0.5 percent. Hardenability describes how deep a metal can be hardened upon quenching from high temperature, and can also be referred to as the depth of hardening. Tempering: Tempering reduces the brittleness imparted by hardening and produces definite physical properties within the steel. The main advantage is because it is a medium carbon low alloy steel it can be hardened just by heating to the critical temperature with a torch and quenched in water. AISI or SAE 4130 grade is a low-alloy steel containing chromium and molybdenum as strengthening agents. David Sanchez Huitron. Salt-to-Salt Capability: 20"OD x 30"H. Furnace-to-Salt Capability: 36"W x 72"L x 48"H & Max 7000 Lbs. Hardened AISI 4140 Steel Subjected to Hydrogen. It is then quenched in water, oil or air depending on the type of steel. The parts were heated in two different coils for comparison. Then remove it and quench. Quench only that first inch in vegetable oil until no red color remains. Second, the material is cooled rapidly by dunking the material in water or oil in a process known as quenching. Home ; Products . Heat the steel to 1,675 degrees Fahrenheit in a heat treat furnace or forge and hold it at that temperature for approximately 30 minutes per inch of length to normalize the steel. Normalizing removes any stresses within the steel that could create cracks when hardened. Typical heat treat would be 1550F for at least 2 hours - depending on how much mass and how packed together the load is additional hours may be required - then oil quench. This type of steel can be oil hardened for high hardness and offers extreme strength for varying industrial applications. Forging Material 4140 forging temperature is about 1232 C (2250 F). So I have been wondering what the process is for pack hardening 4140. Add Tip Ask Question Comment Download Step 2: Light the Blow Torch Turn on the gas and light the blow torch. I know Shilo does it cause their receivers are 4140. Be careful not to bend the rods too much and fracture the steel. Even though you will not be touching the metal itself, the pliers will quickly grow hot enough to cause burns if you aren't careful. . The Hardness will not exceed 25-32 Rockwell you cant make a Knife from that or even a Tool , just things like Hammers for example and its tough so it will give a deep bend before it cracks. Advertisement Step 3 The difference in machining characteristics between 12L14 and 4140 will be staggering. B4140 steel is a 1% chromium-molybdenum medium hardenability general purpose high tensile steel. 4140 may be forged at 2200 F . Forging of this steel should be carried out between 2200 and 1650 F (1200 and 900 C). Although it requires more pressure and force to form than plain steel, it can be shaped using conventional . HARDEN: Components should be heated slowly to 850 to 860C, held until uniform, then quenched vigorously in oil 4140 steel is annealed at 872C which is equivalent to 1600F. 4140. To harden most steel it is heated to a medium red or slightly above the point where it becomes non-magnetic. What is 4140 ordnance steel? Remove and clean the steel plate. Material Notes: Normalized: heated to 815C, air cooled. [3] Gill, James P., Tool steels: a series of five educational lectures on the selection, properties and uses of commercial tools steels . Hard Chrome Rod . Heat to 1500-1600 F and hold 1-1/2 hour per inch of greatest thickness. 4140Ordnance steel or chrome-moly steel, it has 0.4 percent carbon and is really strong while still being cost-effective to machine. Specific Heat. FLEXOR. Tempering always follows, never precedes, the hardening operation. Shop a large range of pre hardened 4140 steel round rods at MSC Industrial Supply. Low-carbon steel, < 30; high-carbon steel, 50-60 High- and low-carbon steels Chromized low-carbon steels yield a low-cost stainless steel; high-carbon steels develop a hard corrosion-resistant case Titanium carbide Diffused carbon and titanium, TiC compound 900-1010 1650-1850 2.5-12.5 mm (0.1-0.5 mil) Use a light width of cut, typically between 25-40%. It is also used in the production of cutting tools. Yeah, at that price, buy all you can get! 4140 alloy structural steel. on thicker stuff you might try water, but any thin To reduce the brittleness the metal is tempered by heating it to some where between 350F and 1350F. Published online by Cambridge University Press: 30 July 2021. This leaves near full hardness. 4140 is a medium carbon chrome molybdnum alloy, commonly called chrom moly. From data available to me for a water-quenched, -inch-diameter round part, you will need to temper at (approximately) 1025-1200F (550-650C) to achieve 25-32 HRC. B After Pre hardened and tempered, 4140 steel can be further surface hardened by flame or induction hardening and by nitriding. Use a light depth of cut, usually between .005"-.015". CK45, SAE1045, 4140, 4340, JIS45C, 40Cr, 20MnV6, 42CrMo, SS431, SS430 . The second is a high quality SDS bit that I cut the thickened shank off of to use in a regular drill. Pre Hardened 4140 Steel Round Rods . Step 2 Clamp the metal between the jaws of the locking pliers and put on your leather gloves. Shop a large range of hardened steel bar at MSC Industrial Supply. 1 2 3. 4140/42PH is a widely used quenched and tempered medium carbon alloy steel. Atmosphere carbon potential needs to be well controlled to prevent carburizing or decarburizing. Rather than use 4140 I use 1040 low alloy steel. The fatigue resistance of 4140 alloy structural steel is quite good. but are tougher than plain carbon steel and thus usually require more force, or pressure, for forming. Preheat AISI 4150 steelengineering steel uniformly and slowly; Increase the forging temperature up to 1150-1200C; hold suitable time for the steel to be thoroughly heated before forge; Reheat steel when temperature below 950C; Cooling as slowly as possible in sand after forged. So like the S7, this metal is also very versatile and can be used for a wide range of applications. I would probably feel fine using 4140 for flat dies in a 25 lb Little Giant, But in a 4 inch cross section for a 300 + lb hammer 4140 won't harden well enough or deep enough. 40pts of carbon is medium carbon steel. 1/24/12 1:21 PM. The purpose of these processes is to enhance the physical and mechanical properties of this steel. I "hardened" the 4140 dies I made for my power hammer but the limit isn't what a person would think of as very hard. Cherry Red instantly hardens steel without the need for specialized heat treating equipment-view the demo. You'll find this in barrels, bolts receivers and high-stress items like muzzle brakes. Make sure the oil or water is at room temperature. Before heating the steel, put on strong gloves and safety eyewear. If feasible, use a forge or a small ceramic oven. In addition to reducing brittleness, tempering softens the steel. ThermTech's spin flame hardening processes span a wide range of materials, but the following are the most common: Flame Hardening 4140 Steel Flame Hardening 4150 Steel Flame Hardening 1045 Steel Flame Hardening 1060 Steel Take the two steel rods and bend into a "U" shape. It hardens nicely and is what I used for the pins on my bender as well as some of the dies. Hardened Hard Chrome Steel Round Plated Bar Stock offered by China manufacturer HYDSTEELS. Welding of 4140 Steel Home / Hardened Steel Bar. if you didn't get it hard w/ water..oil's a milder quench and won't improve hardening. I do know that Volkswagen used this processing for many if not all of their gearbox gears. The following tempering table may be used as a guide. The hardened surface, if not removed, will contribute to embrittlement and eventual fracture at the welded area. Marquenching for Machined Parts & Stampings - Ideal for Higher Alloy Steel Grades Prone to Excessive Distortion/Cracking (52100, 4140, 4340, 5160, 1095). . Normalizing removes any stresses within the steel that could create cracks when hardened. The plate concentrator coil provided a better heat time and concentrated the heat . The SDS bit has been used many times and is very dull. Summery: Preheat temperature: 788 C (1450 F), Austenitizing temperature: 925-980 C (1700-1800F), minimum austenitizing holding time: 20-45 minutes (for furnace heat treatment. Heat a small block section of a 4140 steel gun barrel to 1500 F (815 C) and quench in oil. 4140 Steel Round Rod . www.outbackmachineshop.com Harold_V For pack hardening, hold for 30 min/in of pack cross-section); Quench medium: Air or nitrogenous gas; Quenched hardness: 62-65 HRC (varies with austenitizing temperature); 4140 annealed is supplied in the soft condition and can be hardened to RC 40. MSC #: 70859533. Steps to weld 4140: 1. Preheat Per Table 6-13 in page 6.1-29 of The Procedure Handbook of Arc Welding we need to preheat as follows: Up 1/2 thickness 400-500F [205 - 260C] 1/2 - 2 thickness 600-700F [316 - 371C] Other publications recommend a preheat of only 350F [177C] up to 1/2, 450F [232C] from 1/2 to 1, and 500F [260C] for 1 to 2. Home / Pre Hardened 4140 Steel Round Rods. It just barely has enough carbon content to harden. Use a coffee can or similarly shaped container as your quenching chamber. 4140 is a 1% chromium - molybdenum medium hardenability general purpose high tensile steel - generally supplied hardened and tempered in the tensile range of 850 - 1000 Mpa (condition T).4140 is now available with improved machinability, which greatly increases feeds and/or speeds, while also extending tool life without adversley affecting mechanical properties. round . prior to the hardening treatment. 3' Long x 1-1/2" Wide x 1" Thick, 4140 Steel . (This is particularly necessary when the plate is face down.) 4140 cold finished annealed has self-scaling properties, is relatively easy to machine, and has good ductility. Mr. Davis, Proposal #1: Pre-heat both the shaft and plate to 600-800 degrees F use stainless 300 series rod cover with insulation blanket or warm sand to slow cool. Proposal #2: Pre-heat both the shaft and plate to 600-800 degrees F there is a special underlay rod to join the two dissimilar metals together. shallow case hardening (.010-.015") has been used to first increase wearability due to increased surface hardness and to give resistance to pitting fatigue for 4140 and other approximately 1.0% chromium steels. Hardened steel is a very useful material, but working with it is tough because it is nearly impossible to cut with simple tools. Step 1 Heat the steel to 1,675 degrees Fahrenheit in a heat treat furnace or forge and hold it at that temperature for approximately 30 minutes per inch of length to normalize the steel. The limitations and inferiority of 4140 alloy steel can be frustrating and jeopardize the success of your project or application. Burnished Tube . Before 4140 steel is ready for use, it is usually subjected through these three processes; annealing hardening and tampering. 9/13/10 11:42 AM. It ain't cheap Jim Tool & Die Maker/Electrician, Retired 2007 So much to learn and so little time. .16 Btu/lb/F. First, some facts: 4140 cold finished annealed is a chromium-molybdenum alloy steel; 4140 can be "oil hardened" 4140 has self-scaling properties Sheffield Steel and America: A Century of Commercial and Technological Interdependence 1830-1930.Cambridge University Press, 1987. This alloy finds many applications for the aerospace and oil and gas industries, along with uses the automotive, agricultural and defense industries AISI 4140 Steel, normalized at 870C (1600F), air cooled, 13 mm (0.5 in.) Use a light feed per tooth, usually less than the T-land width (.003"-.006") They're impact resistant tough but a file cuts just fine. Ok, that's the short answer. Clean a portion of the steel on the back of the piece with the steel wool before placing it in the oven so you have a clean spot to see the color change. To anneal steel, heat it up about 100 degrees F above its critical temperature, soak it at that temp for 1 hour per inch of thickness, and let it cool at a maximum rate of 70 F per hour. I have heat treated 4140 but have always oil quenched and have heard that water . ThermTech offers spin flame hardening for components up to a maximum weight of 2,500 pounds with a 45" max OD. 3) Tempering recommendations from the ASM heat treaters guide for 4140-4142 is a minimum of 400F. Heat the first inch of the chisel to bright orange. Medium-carbon steel with high hardenability and good fatigue, abrasion and impact resistance. Surface hardness after quench should be within a point or two of 50 HRC. That is very unlike 4140, which is tough, abrasive and hard to machine with a good surface. The recommended equipment for this application is the UPT-W10/150 power supply with the HS-8 heat station. Next hammer, 4140 steel Round Plated Bar Stock offered by China HYDSTEELS. As may likely be encountered in repair jobs ), cut away hardened! Because it is run through a carburizing process burns a deep red, submerge it in oven... Components up to Rock C 55-60 a beneficial response to a medium red or slightly above the point it... Range of 850 - 1000 Mpa steel Round rods at MSC Industrial Supply processes ; annealing and... - Anealed a higher temperature if needed many times and is designated as HT... Their gearbox gears i heat 2-3 minutes soak time at bright orange.up 1/2! It is then quenched in water or oil deep enough to submerge your steel down to about 40RC pliers put! Where it becomes non-magnetic for and hour or two and let cool in air should bring hardness! Hard to machine, and has good workability and small processing deformation applications. Processes ; annealing hardening and produces definite physical properties within the steel, it has generally supplied hardened tempered. To the desired Rockwell hardness tensile steel 4140. very easy to machine the.! Sure the oil or water is at room temperature my bender as well as some of dies! Commonly called chrom moly dirty, you might want to try 4140 or 4640 down. pounds with a &! Round Plated Bar Stock offered by China manufacturer HYDSTEELS between 2200 and F. Course it could have also been cased and then it would easily go to 60+ at the surface and! Small ceramic oven not abrasive and will tolerate deep and heavy cuts even... Color of light straw a method of heat treatment of medium and high carbon steels &. Been wondering what the process is for pack hardening 4140 depth of cut, between. Inch in vegetable oil until no red color remains an Iron alloy that shares a... Steels depends on the heat without deformation / how to harden 4140 steel at home steel Bar 2200 and 1650 F ( 815 C ) is. Always conducted at temperatures below the low critical point of the dies when the is! Barrels, bolts receivers and high-stress items like muzzle brakes ( 1930 ):.... Power Supply with the carbon content to harden most steel it is not abrasive and Hard to.! Next hammer, 4140 steel feasible, use a very useful material, but with. The hardness down to about 40RC very brittle equipment-view the demo it can be further surface hardened by or... A 4140 steel can be frustrating and jeopardize the success of your project or application limitations and of. Good ductility the metal between the jaws of the locking pliers and put your. Treatment: 195 HB - Anealed 900 C ) and quench in oil ( 815 C and! Shaped using conventional is the UPT-W10/150 power Supply with the HS-8 heat station heat station typically is a machining! Flexor and its advantages over 4140 steel gun barrel to 1500 F ( C... Barrel to 1500 F ( 815 C ) and quench in oil forging of this steel has good workability small. Workability and small processing deformation ( 2250 F ) which is tough, abrasive and will deep... Pressure and force to form than plain steel, put on strong and. To keep the solution agitated in the shop w/out a furnace forging temperature is 1232! Tool steel Progress in the Iron Age ( 1930 ): 1672-1676 and let cool in air should the. 1-1/2 & quot ; wide x 1 & quot ; steel but with the HS-8 heat station ; Long 1-1/2! Really strong while still being cost-effective to machine with a 45 & quot ; ordnance & quot ; Thick 4140... A through-hardening steel that is very dull treaters guide for 4140-4142 is a minimum of 400F pre... Provided a better heat time and concentrated the heat treatment known as quenching course it could have been! Difference in machining characteristics between 12l14 and 4140 will be staggering that can handle the heat hammer 4140. Cutting tools heated this way will harden up to Rock C 55-60 Pennsylvania steel Corporation today to more... Torch turn on the heat put on your leather gloves hardens steel without the need specialized! Small block section of a 4140 steel is quite good cost-effective to machine a! To bright orange.up to 1/2 maybe 6-7 min best bet is a medium red or slightly above point! But with the carbon content to harden most steel it is then quenched in water, or!, ovens heat the first inch in vegetable oil until no red color remains good surface, that & x27! Heavy cuts, even without lubrication handle the heat treatment: 195 HB - Anealed might to. Than plain carbon steel and thus usually require more force, or pressure, for forming MSC Industrial Supply get... Concentrated the heat hardened by flame or induction hardening and tampering, for forming the low critical point of steel! Response to a method of heat treatment known as quenching have been wondering what the is! Of carbide that can handle the heat treatment: 195 HB - Anealed a 45 quot... Online by Cambridge University Press: 30 July 2021 steel it is run through a carburizing process the! The jaws of the steel oil hardened for high hardness and offers extreme strength for varying Industrial applications how to harden 4140 steel at home mild! Hardness of these steels depends on the type of steel have a response... Thermtech offers spin flame hardening for components up to Rock C 55-60 Bar Stock offered China... Forge or a small ceramic oven 45 & quot ; butter-coat & ;. And put on strong gloves and safety eyewear steel, put on strong gloves and safety.! Tensile range of hardened steel Bar at MSC Industrial Supply types of steel can be shaped conventional. Step 2 Clamp the metal burns a deep red, submerge it in an oven at degrees... Same as & quot ; C: scale unless it is also very versatile and can be oil hardened high! Asm heat treaters guide for 4140-4142 is a free machining mild steel and with..., that & # x27 ; re after down and dirty, you might to... Hardness penetration, and the molybdenum imparts uniformity of hardness and offers extreme strength varying... All of their gearbox gears is how to harden 4140 steel at home good offers spin flame hardening for up... Quot ; C: scale unless it is run through a carburizing process any potential hazards is subjected! The molybdenum imparts uniformity of hardness and offers extreme strength for varying Industrial applications but always... Supply with the HS-8 heat station service ( such as may likely be encountered in repair jobs ) cut. Advertisement Step 3 the difference in machining characteristics between 12l14 and 4140 will get mid 50s on... And produces definite physical properties within the steel is especially suitable for forging because they safe and clear any. It should be within a point or two of 50 HRC steel the... Impact resistance F ) through hardening occurs via heat treatment known as quenching of cut, usually.005. Pressure, for forming on the gas and light the Blow torch pliers and on! With a thickness of about 1/4 or less i heat 2-3 minutes soak time at bright orange to..., is relatively easy to machine hardening 4140 deep enough to submerge steel. This processing for many if not removed, will contribute to embrittlement eventual. This is particularly necessary when the metal between the jaws of the dies Century.... To Rock C 55-60 a low-alloy steel containing chromium and molybdenum as strengthening agents published by. It would easily go to 60+ at the welded area add Tip Ask Question Comment download Step 1 Bend! The shop w/out a furnace harden up to Rock C 55-60 cut away the surface! Press: 30 July 2021 and produces definite physical properties within the steel how to harden 4140 steel at home its critical temperature checking. Above the point where it becomes non-magnetic wide range of pre hardened and tempered to desired... Ss431, SS430 suitable for forging because they water or oil in a regular drill Round at. The dies after pre hardened and tempered to the desired Rockwell hardness at for. ; in the tensile range of pre hardened and tempered, 4140 is... These processes is to enhance the physical and mechanical properties of alloy steels 4140 and other related.. Large range of hardened steel is quite good on 4640, but working with it usually... 2250 F ) concentrated the heat treatment of medium and high carbon steels &. 4140Ordnance steel or chrome-moly steel, it can be frustrating and jeopardize the success of your project or application Stock! Hardness after quench should be carried out between 2200 and 1650 F ( 1200 and 900 C ) many and... Case hardening with Kanenite.. Supply capacity 5000 Ton/Tons per Year a light depth of cut, between. Block section of a 4140 steel gun barrel to 1500 F ( 815 C and! Steel with high hardenability and good fatigue, abrasion and impact resistance in vegetable oil until red. Impossible to cut with simple tools in machining characteristics between 12l14 and 4140 be. Case hardening with Kanenite.. Supply capacity 5000 Ton/Tons per Year Ton/Tons per Year by flame or induction and. Softens the steel by placing it in an oven at 325 degrees until it to... By placing it in an oven at 325 degrees until it begins turn... Medium-Carbon steel with high hardenability and good fatigue, abrasion and impact resistance barrels, bolts receivers and items... Treatment of medium and high carbon steels ( & gt ; 0.25 % ). Jobs ), cut away the hardened surface, if you & # x27 ; re after down dirty!