Sep 24, 2020 · While most individuals will argue that 9310 steel is just as strong as Carpenter 158, 9310 steel bolts rely upon proper heat treatment for this strength. 9310 bolts have a documented history of breaking due to improper heat treating as the 9310 steel heat treat procedure requires very strict control in order to meet the specified surface and ...C158 is supposed to technically be stronger than 9310, but many higher end BCG makers are now using 9310 instead of C158 for their bolts b/c they say 158 is antiquated and they have figured out how to make 9310 better than "mil-spec." Faxon uses 9310 in their bolts and so does Noveske. Aero precision and Brownells, which are more budget ...Aermet 100 (Carpenter Technology Corporation), Ferrium C61 and Ferrium C64 (QuesTek Innovations, LLC)) after a preliminary evaluation of a larger material matrix that had consisted of, in addition, CCS42L, LESCO53, 32CDV13 and XD15NW ferrous alloys. Pyrowear 675 is a high strength stainless steel designed for gear application. Aermet …9310 VAR AMS 6265 is a Chromium-Nickel-Molybdenum Alloy used as a Carburizing Grade for Aircraft Parts. Users can obtain high case hardness coupled with high core strength and toughness. High alloy content makes it suitable for use in relatively large cross-sections. Its combination of high alloy and low carbon content can achieve high core ...Toolcraft BCGs are generally available with bolts made from either 9310 or Carpenter 158 steel. They are batch High Pressure Tested (HPT) and every bolt is Magnetic Particle Inspected (MPI). Markings on the bolts vary with some being marked MP or MPI and some being marked 9310 or C158. It is more common though for the bolts to not be marked in ...Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.C158 is the mil-spec steel for the AR platforms rifles, 9310 is the mil-spec steel for other full auto rifles, and many other rifles the military uses. C158 is HARDER to heat treat …Carpenter 158; The Faxon Blog and Podcast. Posted by Faxon Firearms Staff on May 12th 2016. Why 9310 Steel in an AR-15 / M16 Bolt? "9310 is not MIL-SPEC, it's better than MIL-SPEC" Last week Faxon announced the release of their GUNNER series of Modern Sporting Rifle bolt carrier groups. Its been a pleasure working on the car …Lugs were a little more beefy, made from 9310 Vac Arc steel. Seemed to be a little more rugged looking than your standard mil. spec. bolt made from Carpenter 158. A few other minor differences. I have never installed or run this bolt before and was curious if anyone else has had any experience with bolts made from 9310 Vac Arc steel?Carpenter 158 9310 - MAY be harder than Carpenter 158 Nickel baron (easier to clean) Titanium BCG with an S7 bolt. Supposed to be three times more impact resistance than Carpenter 158 ... There has been an increase use in 9310 steel for bolts over C158. 9310 steel claims a slight advantage of toughness when properly heat treated which gives ...Color: Black Finish: Ultra Hard Nitride Additional Features: Flat Design , Shot Peened MPI Bolt - 9310 material. Code: 4LJ-BCG-BCGBN-BCG-N2. MPN: BCG-N2. UPC: 815757023413. $189.99 Save 42%. $109.99. Color: Nickel Finish: Nickel Boron Additional Features: Shot Peened MPI Bolt - 9310 material , Standard Design.C158 minus proprietary source + molybdenum = 9310, a slightly stronger steel with lower quench rates to be come hard and less likely to become brittle than C158. C158 bolt breakages are the biggest failure point for the AR-15 bolt carrier group, and is the biggest reason why C158 is not widely used outside of the AR-15.Is steel still the best material for building? Learn about the pros and cons of using steel for building construction and engineering at HowStuffWorks. Advertisement Ever since the...9310 steel carrier; Carpenter 158 steel bolt; 4140 steel extractor; MIL-SPEC O-ring; MIL-SPEC gas rings; 4140 steel cam pin; 8740 steel firing pin with hard chrome finish; Magnetic particle inspected; Proudly made in the U.S.A. Engraved with our Spider Web Engraving! Will work with 243, 6.5 Creedmoor, 45 Raptor, and other "standard 308 ...The decision depends largely on the specific requirements of your application. For applications that require excellent toughness, wear resistance, and uniform hardness, 9310 steel bolts are a great option. For applications that require high strength, durability, and resistance to thermal shocks, C158 bolts are the ideal choice.Why 9310 Steel in an AR-15 / M16 Bolt? Why is 9310 Steel the superior option for your AR-15/M16 Bolt? Well, 9310 is actually around 7% stronger than Carpenter 158 and is better than "mil-spec." faxonfirearms.com. 9.Carpenter 158® Nickel Alloys. Inconel® 718 AMS 5662 ... 9310 VAR AMS 6265 alloy steel from Rockwell is a low alloy carburizing steel known for its hardenability and ...Carpenter 158 Vs. 9310. Can somebody tell me what the difference is between c-158 and 9310 and why 9310 isn't mil-spec? I've seen 9310 used in some …Now the bolts, they are made with AISI 9310 Steel, 9310 is better suited for an application such as a M16 bolt. 9310 is a steel typically used for gears, cams and things of that nature while Carpenter 158 or P6 tool steel is a plastic injection mold steel. 9310 is easier to machine and is more dimensionally stable in the heat treat process, this equates to better made parts.*The extractors are ...Chemistry. One of the most significant differences between 9310 and 4140 steel is their chemical composition. 9310 steel is alloyed with nickel, chromium, and molybdenum, while 4140 steel contains chromium and molybdenum. Adding nickel in 9310 steel makes it more resistant to stress and fatigue, while the higher chromium content in …Though Carpenter 158 and 8620 steel are used for making Mil-Spec AR-15s, M4s, and M16s, many commercial manufacturers also use other materials. For instance, Faxon Firearms use 9310 Steel bolts for their BCG, and V Seven Weapon System offers a bolt carrier in Grade 5 Titanium. These materials are actually stronger than Mil-Spec steel and are ...Dec 19, 2016 ... MMR appears to be a different billet steel than the others, e.g. 9310 vs. ... Carpenter 158 (also known as ... C158 steel as one of the requirements ...Feb 15, 2020 · The difference is in the steel. Many manufacturers will state that properly heat treated 9310 is approximately 7-8% "stronger" than 158, but 9310 requires that it be heat treated properly to achieve that increase in strength. Carpenter 158 is mil-spec, but many companies nowadays are opting for "stronger" steels like 9310 and S7 which are both ...9310 VAR AMS 6265 is a Chromium-Nickel-Molybdenum Alloy used as a Carburizing Grade for Aircraft Parts. Users can obtain high case hardness coupled with high core strength and toughness. High alloy content makes it suitable for use in relatively large cross-sections. Its combination of high alloy and low carbon content can achieve high core ...Lugs were a little more beefy, made from 9310 Vac Arc steel. Seemed to be a little more rugged looking than your standard mil. spec. bolt made from Carpenter 158. A few other minor differences. I have never installed or run this bolt before and was curious if anyone else has had any experience with bolts made from 9310 Vac Arc steel?9310 Steel. Often called 19130, this is the most common metal for a bolt. It is a nickel-chrome-molybdenum case-hardened steel, and it's harder than Carpenter 158. These are the cheapest BCGs. The problem is so many companies advertise 9310 bolts, and you only find out it isn't 9130 when it breaks.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.0. C158, 8620, 9310 BCG Steel. These are the (3) most common BCG steels being used in today's AR/M4 industry (from what I read about). I know just a little bit about metallurgy, but, not enough to distinguish what comes into play when each steel is used for BCG's. My (2) AR's use 9310 steel for the BCG's.8740 steel firing pin with hard chrome finish. Magnetic particle inspected. Proudly made in the U.S.A. 6.5 Grendel Nitride Bolt Carrier Group (Type II) BCG Nitride 6.5 Grendel (Type II) Bolt Carrier Group (BCG) Product Specs: 6.5 Grendel Salt bath nitride finish M16 cut 9310 steel carrier Carpenter 158 steel bolt 4140 steel extractor MIL-SPEC O-ri.I've seen 9310 used in some bolts and wonder if it's actually inferior. Is there technical data to show that c-158 is superior? Carpenter 158 Vs. 9310 - Page 11M-50 VIM-VAR is a premium-melted alloy exhibiting excellent resistance to multi-axial stresses, resistance to softening at high service temperatures and good resistance to oxidation. Characteristic of a high-speed tool steel, it possesses high compressive strength. All M-50 at Sullivan is melted in the USA. Domestic Source and DFARS Approved. FOR REQUIREMENTS: High Temperature Steel, AircraftThis - $58.95. $60.95 was 9310 steel AO Precision Premium Phosphate Bolt Carrier Group - 158 HPT/MPI This mil-spec bolt carrier group goes through rigorous quality control tests before it's made available for purchase, including high pressure testing and magnetic particle inspection.0. C158, 8620, 9310 BCG Steel. These are the (3) most common BCG steels being used in today's AR/M4 industry (from what I read about). I know just a little bit about metallurgy, but, not enough to distinguish what comes into play when each steel is used for BCG's. My (2) AR's use 9310 steel for the BCG's.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Both SAE-AISI 9310 steel and SAE-AISI H13 steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown. For each property being compared, the top bar is SAE-AISI ...Bolt is made of 158 carpenter instead of the 9310 i notice most others are. Is the 158 going to hold up fine its a hunting rig for a buddy that probly wont see a lot of rounds. ... Why is 9310 Steel the superior option for your AR-15/M16 Bolt? Well, 9310 is actually around 7% stronger than Carpenter 158 and is better than "mil-spec." "Down the ...While most individuals will argue that 9310 steel is just as strong as Carpenter 158, 9310 steel bolts rely upon proper heat treatment for this strength. 9310 bolts have a documented history of breaking due to improper heat treating as the 9310 steel heat treat procedure requires very strict control in order to meet the specified surface and ...The difference is in the steel. Many manufacturers will state that properly heat treated 9310 is approximately 7-8% "stronger" than 158, but 9310 requires that it be heat treated properly to achieve that increase in strength. Carpenter 158 is mil-spec, but many companies nowadays are opting for "stronger" steels like 9310 and S7 which are both ...Brownells TiN Lightweight BCG. Their bolt uses 9310 steel, but again…it is likely never going to matter and is the standard for lightweight builds. It weighs in a little heavier than the Titanium counterparts at 8.2 ounces but is less than half the price. Brownells TiN Lightweight BCG, Rear.Toughness of over 200 ft./lb. Charpy C-Notch. HRC of 46 yields a 15% increase in hardness at the same toughness comparing to Carpenter 158 & 9310. Mil-Spec Extractor and Ejector Springs, Gas Rings. While the two bolts have identical construction, the two coatings vary slightly.Carpenter Technologies' 158 blend of steel was selected as it provided adequate strength and wear characteristics. It has been the "Mil-Spec" since. Since the creation of Carpenter 158, the metals industry has continued to innovate, creating new blends of steels. 9310 is a AISI standard grade of tool steel that makes it about ~7% stronger than ...9310 and Carpenter steel are both high quality, strong materials that are made stronger through heat treating. (see increasing yield strength) However, the metals can be heat treated to a increased strength where they become hard and brittle. ... The MAX yield strength for 158 and 9310 is apx 160000 PSI set by the companies that manufacture the ...For starters, the bolt is made from 9310 steel which when properly heat treated is just about as durable as Mil-spec Carpenter 158 steel… In addition to that, the bolt is Magnetic Particle Inspected (MPI) which means that is inspected for weak points, and the carrier is constructed from 8620 which is an incredibly solid steel…Bolt Material: Machined from Mag Particle Inspected Carpenter 158 or 9310 Steel. Barrel: 16" Heavy Profile, Chrome Lined with A2 Flash Suppressor. Barrel Material: 4150 Chrome Moly Vanadium 11595E Steel w. M4 Feed Ramps. Rifling: 1 Turn in 9" - Right Hand Twist. Stock: A2 Standard Stock.Stick with a C158 phosphate BCG from any reputable brand. If you want it to be slightly easier to clean then get a chrome one or an NP3 from Sionics. Avoid nitride ( especially if it comes with a 9310 bolt), NiB, TiN, and most other wiz-piss finishes. DLC isn't that bad but it's still not as good as a phosphate carrier with a chrome-lined bore. 3.The Bolt is machined from Carpenter 158 or 9310, shot peened and hard turned as per the military spec. Each BCG is further fitted with a Lantac CP-R360 domed head cam pin, which are precision machined from 17-4PH stainless steel, hand polished and hardened to H900 condition, this further reduces friction and wear within the upper receiver.Mar 11, 2022 · Toughness of over 200 ft./lb. Charpy C-Notch. HRC of 46 yields a 15% increase in hardness at the same toughness comparing to Carpenter 158 & 9310. Mil-Spec Extractor and Ejector Springs, Gas Rings. While the two bolts have identical construction, the two coatings vary slightly.This - $58.95. $60.95 was 9310 steel AO Precision Premium Phosphate Bolt Carrier Group - 158 HPT/MPI This mil-spec bolt carrier group goes through rigorous quality control tests before it's made available for purchase, including high pressure testing and magnetic particle inspection.Chemistry. One of the most significant differences between 9310 and 4140 steel is their chemical composition. 9310 steel is alloyed with nickel, chromium, and molybdenum, while 4140 steel contains chromium and molybdenum. Adding nickel in 9310 steel makes it more resistant to stress and fatigue, while the higher chromium content in …I recently purchased a Toolcraft 5.56 NATO Black Nitride BCG....but choose 9310-Steel-Bolt instead of the Carpenter 158 steel bolt? Do I need to return it...Heat Treatment of steel grade SAE 9310 . Heat treated : 1657°C - 1767°C. Technological Curves of steel grade SAE 9310 . No Curve. Cross Reference Table (Equivalent Grade) of SAE 9310 . Grade Standard Country Application; SAE NVl(1541) SAE: USA: precipitation hardening: SAE NV2(1547) SAE: USA:Cowen & Co. has decided to maintain its Outperform rating of Carpenter Tech (NYSE:CRS) and raise its price target from $50.00 to $54.00. Share... Cowen & Co. has decided to mai...9310 VAR AMS 6265 is a Chromium-Nickel-Molybdenum Alloy used as a Carburizing Grade for Aircraft Parts. Users can obtain high case hardness coupled with high core strength and toughness. High alloy content makes it suitable for use in relatively large cross-sections. Its combination of high alloy and low carbon content can achieve high core ...9310 Alloy Steel (also known as AISI 9310 steel) is a low alloy steel composed primarily of nickel and chromium. It shows high hardenability, high core hardness and high fatigue strength. 9310 also possesses solid ductility, weldability, and machinability properties, and is an excellent metal for use in heavy-duty machinery, case hardened components, and gears.9310 VAR AMS 6265; 4340 VAR AMS 6414; Aermet® 100 AMS 6532; ... CBS-50 NiL® AMS 6278; Carpenter 158® ... Pyrowear® 53 is a double vacuum melted premium alloy steel. It is a carburizing gear steel and exhibits a strong fatigue resistance, toughness and deep hardenability. ...The structural steel frame is a long-lasting, cost-effective, and ecologically-friendly construction method for low-rise, mid-rise, and high-rise Expert Advice On Improving Your Ho...Creating Steel - Creating steel involves removing the impurities from iron. If you succeed in creating steel, the result is a material that's even stronger than iron. Advertisement...I bought one thinking it had a Carpenter 158 bolt according to the product description. The bolt I received is marked MPI 9310. The have subsequently changed the description to Carpenter No. 9310 steel. They claim the extractor is tool steel machined, however it and the gas key appear to be MIM.Introduction. This report presents the results of tensile and fatigue tests performed on a group of 9310 Steel. specimens (Iteration 125 and 149). The material was provided by the American Iron and Steel. Institute. The objective of this investigation is to obtain the mechanical fatigue properties, cyclic.Carpenter 158 is a case (surface) hardened steel where 8620/9310 is through hardened. Case hardening allows C-158 to be very hard on the outside to prevent wear and crack formation while the inside is softer and more flexible to prevent crack propagation and absorb shock loads. 8620/9310 being through hardened can either be softer and better at ...9310 steel carrier; Carpenter 158 steel bolt; 4140 steel extractor; MIL-SPEC O-ring; MIL-SPEC gas rings; 4140 steel cam pin; 8740 steel firing pin with hard chrome finish; Magnetic particle inspected; Proudly made in the U.S.A. Engraved with our Spider Web Engraving! Will work with 243, 6.5 Creedmoor, 45 Raptor, and other "standard 308 ...The carrier is usually made of 8620 steel, but the bolt (which takes the brunt of pressure and such), I've seen made of 8620 steel, carpenter 158, and 9310 steel. The "mil-spec" is carpenter 158; some companies have claimed 9310 steel to be stronger or just as good, but less expensive. In stock at PSA right now are some quality BCG's for less ...Jun 18, 2017 · Lugs were a little more beefy, made from 9310 Vac Arc steel. Seemed to be a little more rugged looking than your standard mil. spec. bolt made from Carpenter 158. A few other minor differences. I have never installed or run this bolt before and was curious if anyone else has had any experience with bolts made from 9310 Vac Arc steel?Carpenter 158 Vs. 9310. Can somebody tell me what the difference is between c-158 and 9310 and why 9310 isn't mil-spec? I've seen 9310 used in some bolts and wonder if it's actually inferior. ... This will quickly move the solution beyond the simple question of which steel is best, for the best steel if applied out of context will not perform ...BCGs can be made of materials such as Carpenter 158 steel, 8620 steel, or 9310 steel, and are often coated with finishes like phosphate or nickel boron. 4. What is the significance of a properly staked gas key on a BCG?Toolcraft Logo'd Carpenter 158 Nitride Full-Auto Bolt Carrier Group . Rating: 98%. Regular Price $129.99 Special Price $79.99. Add to Cart. Add to Wish ... PSA 20" Rifle-Length 6.5 Grendel 1/8 Stainless Steel Barrel & BCG Combo - 5165448797 . Rating: 94%. Regular Price $289.99 Special Price $249.99. Add to Cart. Add ...9310 VAR AMS 6265 is a Chromium-Nickel-Molybdenum Alloy used as a Carburizing Grade for Aircraft Parts. Users can obtain high case hardness coupled with high core strength and toughness. High alloy content makes it suitable for use in relatively large cross-sections. Its combination of high alloy and low carbon content can achieve high core ...Pyrowear® 675 stainless is a carburizing, corrosion resistant steel designed to provide a case hardness in excess of HRC 60 combined with a tough, ductile core. Its corrosion is similar to 440C stainless, while the core toughness is similar to AISI 9310. In addition, the alloy provides excellent hot hardness capability.6.5 Grendel/Grenade bolt steel? Centerfire Rifles - Semiautomatic or Gas OperatedBrownells TiN Lightweight BCG. Their bolt uses 9310 steel, but again…it is likely never going to matter and is the standard for lightweight builds. It weighs in a little heavier than the Titanium counterparts at 8.2 ounces but is less than half the price. Brownells TiN Lightweight BCG, Rear.Jan 6, 2014. #2. It's my understanding that the 158 is mil spec for the bolt, 8620 is spec for the carrier and 9310 is less than 10% harder than the 158. I think I've read somewhere …8620 V/S 9310 V/S Carpenter 158 V/S S7 Steel: 8620 (normalized) is MIL-SPEC (MIL-S-16794) alloy used to machine the bolt carrier. Tensile Strength: 640 MPa Yield Strength: 360 MPa 9310 (normalized). 9310 is 10% less harder than the 158. Tensile Strength: 910 MPa Yield Strength: 570 MPa Carpenter 158. This is the MIL-SPEC alloy used for the bolt.What is the difference between Carpenter 158 and 9310 steel? Carpenter 158 is the military specification (mil-spec) for bolts. 9310 is a more modern steel which can be up to 8% stronger than Carpenter 158. They are both premium steels with a long and successful history of use in AR15 bolts. Either will serve you well!BCGs can be made of materials such as Carpenter 158 steel, 8620 steel, or 9310 steel, and are often coated with finishes like phosphate or nickel boron. 4. What is the significance of a properly staked gas key on a BCG?Bolt Material: Machined from Mag Particle Inspected Carpenter 158 or 9310 Steel. Barrel: 16.5" Med. Profile, Chrome Lined w. welded compliant compensator. Barrel Material: 4150M Chrome Moly Vanadium 11595E Steel. Rifling: 1 Turn in 10" - Right Hand Twist - 6 Lands & Grooves.9310 Vac Melt is a high quality carburizing steel produced by a vacuum consumable electrode process. 9310 has a high hardenability, high core hardness and high fatigue strength. All of those aspects considered, 9310 steel is ideally suited for aircraft engine gear and pinon applications. 9310 Alloy Steel is manufactured for the purpose of case ...Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.For a private individual, why would it be any different? You buy a C158 bolt and it lasts 10,000 rounds, so you replace it for $80.00 after 10,000 round.Jun 4, 2016 · semi_cop. I think 9310 has more molybdenum and C-158 and P-6 machine steel is the same and has more nickel and chrome. I think C-158 has to be bought in larger bulk quantities than 9310 which has also led to more 9310 offerings. From what I understand if done right 9310 is more durable. I think all my bolts are 9310 except one in a COLT 5.56 gun.Brownells 9310 vs PSA H&R C158 BCG for 607 build I hate not knowing, doing my research, and realizing how confused I am, and knowing much less than I thought - which one boys & girls? Locked post. New comments cannot be posted. Share Add a Comment. Be the first to comment Nobody's responded to this post yet. ...9310 Alloy Steel (also known as AISI 9310 steel) is a low alloy steel composed primarily of nickel and chromium. It shows high hardenability, high core hardness and high fatigue strength. 9310 also possesses solid ductility, weldability, and machinability properties, and is an excellent metal for use in heavy-duty machinery, case hardened components, and gears.