9310 steel vs carpenter 158

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"Straw man arguments" are utilized in debates to undermine the opposition. If you want to take the high road–and debate more effectively in the process–utilize the "steel man" argu...Alloy 9310 in bar SPECIFICATIONS: GRADE ALLOY 9310, AISI 9310, UNS G93106 Castle Metals distributes a wide range of Alloy 9310 in bar from our distribution centers in the U.S., Canada, Mexico, Shanghai, Singapore, France, and the U.K. When customers confer with us on 9310, sometimes they share their challenges with inventory accuracy. Should we decide that custom bar codes could simplify the ...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 ...Dec 10, 2013 · Wilson combat has a 9310 steel Bolt Carrier Group on sale for $98.57, which is something like $70 off regular price. The three main BCGs I am looking at right now: PSA premium 158 Carpenter - was on sale for $109 when I put my order in Rainier Arms 158 Carpenter - on sale for $119 Wilson combat 9310 steel - on sale for $98.57.Quoted: As I understand it, Carpenter 158 is a case (surface) hardened steel where 8620 is through hardened. This would allow 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 being through hardened can either be softer ...

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 ... Carpenter 158 came first & was adopted as the mil-spec steel for the bolt, and 9130 was developed later.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.This BCG features a C158 bolt, 4340 extractors, and an S7 tool steel ejector. The gas key is made out of 4130 steel, is chrome lined as it should be, and includes enhanced Sprinco extractor springs, a sealed gas key, and properly staked gas key screws. The carrier is made out of 8620 steel and has a phosphate finish with a chrome-lined bore.Made from Mil-spec Carpenter 158 steel, this BCG is built to accommodate heavier grain cartridges, such as subsonic .300 AAC Blackout ammo. ... 8620, and 9310 heat-treated steel, the internals of this BCG guarantee durability. It's also coated with QPD nitride, providing excellent resistance to wear and corrosion. The adjustable titanium gas ...and AIS1 9310 Gear Steels J 4- Dennis P. Townsend and Erwin V. Zaretsky 1.. 5. ,, - NOVEMBER 1980 .> 4 . TECH LIBRARY KAFB. NY ... material was originally developed as a tool steel and designated H-12 tool steel. The H-12 steel was later modified by lowering the carbon content from 0.35 to 0.24 percent and designated Vasco X-2.However by comparison to Carpenter 158, AISI 9310 has several elements present in its composition that are detrimental to fatigue while not being evident in the physical properties. It has become evident from the industry that a number of manufacturers have jumped upon the AISI 9310 wagon in order to claim better performance.Fully treated, Carpenter 158 attains a core strength of approximately 160 ksi (1103 MPa) tensile strength with a yield point of approximately 135 ksi (931 MPa). These high mechanical properties are developed in sections up to 5" (127 mm) thick, making Carpenter 158 a consideration for use in very large parts requiring maximum strength, wear ...Bolt Material: Machined from Mag Particle Inspected Carpenter 158 or 9310 Steel. Barrel: 18" Fluted, Chrome Lined with A2 Flash Suppressor. Barrel Material: 4150M Chrome Moly Vanadium 11595E Steel. Rifling: 1 Turn in 10" - Right Hand Twist - 6 Lands & Grooves. Stock: Magpul MOE Fixed Buttstock.

Here are the specs: Coated Inside & Out With UCT's EXO NiB Milspec Carpenter No. 158® Steel (Bolt) 8620 Tool Steel (Carrier) Mil-Spec Extractor Spring, ... You are correct about the heat treating and carpenter 158 vs 9310. 158 is mil spec, that is good and generally when manufactures say its c158, you can bet its good. Some say 9310 is better ...5.56 Bolt is machined from Carpenter 158 tool steel; Shot peened; HPT tested/MPI marked; Black o-ring insert on extractor ... Nickel Bolt Carrier Group: No Aero 'A' Logo; Machined from 8620 Tool Steel (Carrier) and 9310 Steel (Bolt) Carrier has forward assist serrations; Shrouded firing pin; Nickel Boron Coating inside and out (Bolt, Carrier ...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 ...8740 Steel Firing Pin with Hard Chrome Finish. Magnetic Particle Inspected. Available in AR-15 and AR-308 sizes. Engraved In House. Proudly Made In The USA. American Flag Engraved Bolt Carrier Group American Flag Engraved BCG Product Specs: M16 cut 9310 steel carrier Carpenter 158 steel bolt 4140 steel extractor MIL-SPEC O-ring MIL-SPEC gas ...and AIS1 9310 Gear Steels J 4- Dennis P. Townsend and Erwin V. Zaretsky 1.. 5. ,, - NOVEMBER 1980 .> 4 . TECH LIBRARY KAFB. NY ... material was originally developed as a tool steel and designated H-12 tool steel. The H-12 steel was later modified by lowering the carbon content from 0.35 to 0.24 percent and designated Vasco X-2.Simple, 9310 is an AISI standard grade tool steel which, when properly treated, actually makes it about 7% stronger than "mil-spec" Carpenter 158. The proof is in the numbers. The carrier material, 8620 is used for various aircraft and vehicular applications, has a superior toughness rating, and features solid overall strength properties.

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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.Carpenter No. 158 Bolt Steel. Carpenter No. 158 steel is the mil-spec steel used for fabricating the bolt itself. This type of steel is more expensive than 9310 (another popular steel used for the bolt and carrier), but it provides the best performance and lifespan for the BCG.The first difference between 8740 and 4140 steel is their chemical composition. Both are alloy steels but have different alloying elements. 8740 steel contains carbon, chromium, molybdenum, phosphorus, and silicon. These elements boost the steel's strength and provide excellent toughness. In contrast, 4140 steel consists of carbon, chromium ...Carpenter 158, on the other hand, contains a high percentage of carbon, which makes it incredibly hard and strong. Additionally, Carpenter 158 has a higher tensile strength and yield strength than 8620 tool steel, which means it can handle heavier loads and higher stress. Another important factor to consider when comparing these two tool steels ...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 ...Carpenter 158 is steel from the 60's, literally. Does not a 'best' BCG make. The carrier itself however, almost irrelevant. Reply reply 1000stomachcrunches • thanks for the info, his comment had me off on a hunt to learn more about 9310, didnt think to check if 158 is actually the best. Im normally more of a skeptic too. Reply reply ...

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?Simple, 9310 is an AISI standard grade tool steel which, when properly treated, actually makes it about 7% stronger than "mil-spec" Carpenter 158. The proof is in the numbers. The carrier material, 8620 is used for various aircraft and vehicular applications, has a superior toughness rating, and features solid overall strength properties.Carpenter 158 and 9310 steel are the best materials for the bolt. And 8620 steel will work with the carrier, though it’s not strong enough for the bolt. Quality …Conclusion. In conclusion, 9310 and 158 steel have unique properties and characteristics that make them ideal for certain applications. 9310 steel is tougher and more impact-resistant, while 158 steel is more corrosion-resistant. When choosing between the two, it's important to consider your project's specific requirements and needs.Conclusion. In conclusion, 9310 and 158 steel have unique properties and characteristics that make them ideal for certain applications. 9310 steel is tougher and more impact-resistant, while 158 steel is more corrosion-resistant. When choosing between the two, it's important to consider your project's specific requirements and needs.Apr 21, 2020 ... BCG Specifications: https://studio.youtube.com/video/jVPqwwS8AM8/edit Patreon: https://www.patreon.com/kotaboy32 Email: [email protected] ...Thread: Carpenter 158 Vs. 9310. Thread Tools. Show Printable Version; 11-14-13, 18:32 #11. Mr blasty. View Profile View Forum Posts View Articles Member Join Date Jun 2010 Location MN Posts 947 Feedback Score 6 (100%) Originally Posted by SilverBullet432.Business, Economics, and Finance. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. CryptoBolt Material: Machined from Mag Particle Inspected Carpenter 158 or 9310 Steel. ... Barrel Material: 4150 Chrome Moly Vanadium 11595E Steel w. M4 Feed Ramps. Rifling: 1 Turn in 9" - Right Hand Twist. Stock: Magpul CTR Carbine Stock with Magpul ASAP QD Single Point Receiver End Plate.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!Business, Economics, and Finance. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. Crypto

c158 is carpenter 158 meaning only carpenter can supply the stock so it's held to their standards. many years back after a mass shooting there was a run on parts including bcgs and manufacturers couldn't get c158 in a steady enough supply so they looked at alternative metals including 9310. on paper 9310 is stronger when heat treated correct, but given the rush of production that wasn't always ...

Machining DataSheet for Steel 9310 (14NiCrMo134) Machining DataSheet for. Steel 9310 (14NiCrMo134) Steel 9310 Menu: Equivalent Standards. Chemical Composition. Cutting Speeds Recommendation. Recommended Carbide Grades. Cutting Edge Geometry.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.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 ...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 159310 or Carpenter 158 (C158) Steel: Bolt Finish: Black Nitride: Caliber.223 | 5.56 NATO | 300 Blackout: Extractor O-ring: Viton; Mil Spec: Carrier Material: ... Cam Pin Finish: Black Nitride: Firing Pin Material: 8740 Steel; Hard Chrome Plated: Manufacturer: Toolcraft . Note: Some dealers are selling Toolcraft BCGs that have been finished after ...Click The Button Below To Learn More About The Toolcraft 5.56 Phosphate MPI Full-Auto BCG - No Logo (Over 195 Reviews!): 3. Toolcraft Nitride Full-Auto BCG (w/ Logo & Carpenter 158 Bolt) Number 3 on this list of fantastic BCGs is the Toolcraft Nitride Full Auto BCG, and there are a number of reasons why I like it.One of the main differences between these two materials is their composition. S7 tool steel contains higher carbon and chromium levels, with higher hardness and wear resistance. 9310, however, has a lower carbon content but contains nickel, which gives it higher toughness and fatigue strength.The bolt is constructed from magnetic particle inspected Carpenter 158 steel, known for its strength and reliability. The carrier is crafted from aircraft-quality 8620 steel and features the M16 cut. It includes a gas key secured by properly staked grade 8 screws for enhanced reliability. The gas key is built from 4130 steel to withstand the ...Magnetic Particle Inspected. Available in AR-15 and AR-308 sizes. Engraved In House. Proudly Made In The USA. ENGRAVED AR Bolt Carrier Group (BCG) - Join Or Die BCG Product Specs: M16 cut 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 c.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 ...

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5.56 Bolt is machined from Carpenter 158 tool steel; Shot peened; HPT tested/MPI marked; Black o-ring insert on extractor ... Nickel Bolt Carrier Group: No Aero 'A' Logo; Machined from 8620 Tool Steel (Carrier) and 9310 Steel (Bolt) Carrier has forward assist serrations; Shrouded firing pin; Nickel Boron Coating inside and out (Bolt, Carrier ...High hardenability. 9310 steel bar is a case-hardening steel regarded as a premium carburising steel alloy. Alloy 9310 combines high fatigue strength with high core hardness. The low alloy product offers high hardenability and is particularly useful in high core strength applications, especially in aerospace. 9310 is a nickel-chromium ...Jan 14, 2020 · The Relia-Bolt™ is machined from S7 tool steel and tempered with SRC’s proprietary heat-treating process, significantly increasing strength when compared to MilSpec Carpenter 158. S7 provides a 75% increase in tensile strength, and nearly 60% improvement in yield strength.-See it at Sharps here. Low Plasticity Roller Ball Burnishing:May 29, 2022 · 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.Features: M16-cut carrier. Machined from 8620 Tool Steel (Carrier) and 9310 Steel (Bolt) Carrier has forward assist serrations. Black Nitride Finish - advanced lower friction coating that minimizes the need for lubricants and cleaning. Properly staked gas key. 5.56 Bolt is machined from Carpenter 158 tool steel. Shot peened.Decarbonise steel or miss sustainability goals. India’s heavy industry, particularly steel manufacturing, is the sore spot of its climate action plans. The booming sector could bri...Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.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 BCG features a C158 bolt, 4340 extractors, and an S7 tool steel ejector. The gas key is made out of 4130 steel, is chrome lined as it should be, and includes enhanced Sprinco extractor springs, a sealed gas key, and properly staked gas key screws. The carrier is made out of 8620 steel and has a phosphate finish with a chrome-lined bore.This Toolcraft DLC Bolt Carrier Group comes complete with a 9310 grade tool steel bolt. This bolt steel is 7% stronger than commonly used "mil-spec" Carpenter 158 steel. This tougher than mil-spec bolt, when paired with Toolcraft quality and the Ionbond DLC finish is quite likely the ultimate hard use bolt carrier group!Hardness. S7 tool steel has a hardness of 48-52 HRC, while Carpenter 158 has a hardness of 60-62 HRC. The higher hardness of Carpenter 158 makes it more suitable for use in applications where wear resistance is important, such as cutting tools and dies. However, the higher hardness makes Carpenter 158 more difficult to machine than … ….

Milspec is C158. 9310 is very common in commercial bolts. Either will work. I’d still sooner use a nitride carrier over all others, with chrome second and other coatings including NiB down the list somewhere. In a ‘two is one, one is none’ philosophy, either material can be seen in broken bolts, but in a properly set up rifle it’s rare ...Bren. 79807 posts · Joined 2005. #2 · Aug 21, 2019. I looked at a couple of PSA kits recently and the only difference was that one had a 9310 bolt and one had a C158. I doubt it makes any difference, but the C158 is the mil spec, so it has been tried and tested a lot more for a lot longer, so I went with that. The left are a coalition of ...Both normalized SAE-AISI 9310 and SAE-AISI 4340 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.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.The NBS .223/5.56 DLC Bolt Carrier Group was designed with strength in mind. Starting with a 9310 Steel Bolt, which is aircraft-grade material, this bolt has a high core strength rating, a high fatigue strength, and a high hardenability rating. 9310 steel, when treated properly, is about 7% better than Carpenter 158 steel, so you know that you will have a …The NBS .223/5.56 Black Nitride Bolt Carrier Group was designed with strength in mind. Starting with a 9310 Steel Bolt, which is aircraft-grade material, this bolt has a high core strength rating, a high fatigue strength, and a high hardenability rating. 9310 steel, when treated properly, is about 7% better than Carpenter 158 steel, so you know that you will …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 ...Various grades of steel make up the most common AR-15 bolt carrier groups. Typically, the carrier itself is machined from 8620 or 9310 steel, with the bolt itself being Carpenter 158. The firing pin may be 8740 steel and chrome-plated for longevity. The gas key itself may be 4140 steel.Carpenter ants can be a problem inside of a home as well as in trees or wooden structures outside of the home. Expert Advice On Improving Your Home Videos Latest View All Guides La...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... 9310 steel vs carpenter 158, 4 days ago · This bolt carrier group is high pressure tested as well as magnetic particle inspected, and it’s shot peened for added durability. The bolt is Carpenter 158 steel and the carrier is 8620 steel. And it has a Mil-Spec phosphate, matte black finish. The BCG has a shrouded firing pin and works in both full-auto M16s and semi-auto AR-15s., The carrier is made of AISI 8620 aircraft-quality steel, the Carpenter Technology No. 158 Alloy is used for the bolt, and the gas key is made from 4130 Chromoly steel. ... The bolt on this one is made from case-hardened 9310 steel which has been shot-peened and magnetic particle inspected for maximum durability and reliability., 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. Is there technical data to show that c-158 is superior?, Sep 4, 2014 ... If its a gun you are going to shoot a lot, I would stick with C158. If its a gun that wont see more than a couple hundred rounds a year, 9310 is ..., The first difference between 8740 and 4140 steel is their chemical composition. Both are alloy steels but have different alloying elements. 8740 steel contains carbon, chromium, molybdenum, phosphorus, and silicon. These elements boost the steel's strength and provide excellent toughness. In contrast, 4140 steel consists of carbon, chromium ..., Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear., Compared to modern alloys, 158 is a very poor choice for carbine weapons, failing in as little as 3,000 rounds when pushed hard - 9310 is far superior in this respect. Also, since Carpenter has never made or tested any bolts using 9310, I fail to see how anything they say with regard to its use is of any relevance whatsoever., The most common is Carpenter 158 or C-158 steel, and the second most popular is 9310 steel. The exact difference between them is a lot of scientific talk but the easy version is that 9310-steel is about 7% stronger than C-158 when heat treated correctly. However, C-158 is Mil-Spec. Why is C-138 Mil-Spec if there is something better out there?, A little more expensive, but easier to heat treat with little if any distortion. You can get 55 c scale with S-7 air quench. The other two have to be done in a carbon gas atmosphere . S-7 has a higher shock rating, but slightly less in the wear and abrasion than 9310 or 158., Carpenter 158 Vs. 9310; If this is your first visit, be sure to check out the FAQ by clicking the link above. ... I doubt it takes anywhere near a pound of steel to come out with a 3 or so ounce finished bolt. If it takes a third of a pound, that is still only $10 in the cost of a $50+ Bolt. IF the machine work and heat treat are similar, it ..., 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..., Fit: Semi-Auto or Full Auto AR-15/M16 (.223 or 5.56mm NATO) Material: Carrier (8620 Steel), Bolt (C158) Finish: Nickel Boron Plated. Extras: Properly Staked Gas Key. ACME Machine has been in business since 1976 crafting highly precise components. All ACME BCG parts are of the highest quality and 100% made in America., Bearing & Gear Steel UNS# 9310 G93106 52100 G52986 ACUBE® 100 Carpenter 158 T51606 CBS-223 CBS-50 NiL K91231 M-50 T11350 CBS-600 K21940 Ferrium® C61 K93061 Ferrium® C64 K92731 L-6490 T11350 Nitralloy 135M K24065 Nitralloy N Pyrowear® 53 K71040 High Strength AerMet® 100 K92580 Aermet® 100 Plus AerMet® 310 AerMet® 340 35NCD16 300M K44220 ..., Bolts available in 9310 Steel or Carpenter 158 Our products carry a lifetime warranty. Simply put Should any of our products fail, return it to us for a brand new replacement. Posted: 1/1/2020 3:57:10 PM EDT [#18] As long as the bolt isn't 8620, the carrier is usually made from this but after Sandy Hook a lot of shady fly-by-night manufacturers ..., 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., By comparison AISI 9310 will on first inspection also make an adequate bolt material. It has several alloy elements that promote a better structure and in the correct heat treatment will provide a slightly higher toughness than Carpenter 158 which is benificial to the fatigue life., Sep 6, 2023 · While 9310 Tool Steel and Carpenter Steel have exceptional properties, they also have weaknesses. 9310 Tool Steel is known to be brittle at room temperature, while Carpenter Steel has a lower resistance to corrosion and oxidation. If cost is a major consideration for your project, Carpenter Steel may be a more affordable option., Carpenter 158 and 9310 steel are the best materials for the bolt. And 8620 steel will work with the carrier, though it's not strong enough for the bolt. Quality Control/Preparation. The right quality inspections for the bolt are high pressure tested (HPT) and magnetic particle inspected (MPI). And it should be shot peened to ensure durability ..., Bolt Steel: Carpenter No. 158 Steel. Profile: Full Auto Profile. Gas Key: Grade 8 Hardened Fasteners, Staked per MilSpec. Features. This Toolcraft Logo'd Nitride BCG is made with a carpenter 158 bolt with a full-auto profile, designed to be used in AR-15 & M-16 style rifles. Bolt is magnetic particle inspected (MPI) for a uniform quality and ..., The high alloy content in 9310 allows for heavy sections to be treated to result in high case hardness and high core strength and toughness. This material is useful without carburizing, yet carburizing produces a highly wear-resistant case. The material is vacuum degassed and is also available in consumable electrode vacuum remelting process., 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…, The bolt in this assembly is made of 9310 steel instead of Carpenter 158, whereas the bolt carrier itself is fabricated from 8620 steel. Following machining, the process includes a heat-treated and shot-peened finish. The overall steel quality is assured with magnetic particle inspection with MP marking on the bolt., Carpenter 158, on the other hand, contains a high percentage of carbon, which makes it incredibly hard and strong. Additionally, Carpenter 158 has a higher tensile strength and yield strength than 8620 tool steel, which means it can handle heavier loads and higher stress. Another important factor to consider when comparing these two tool steels ..., 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 strength. 9310 VAR also possesses solid ductility, weldability, and machinability properties. Stock sizes: 1.000" to 12.000" diameter., 9310 is stronger than C158 if both are heat treated properly. C158 is a lot easier to heat treat than 9310 and premature bolt failures are found on 9310 bolts a lot more often than C158, especially if the 9310 is nitrided. So many conflicting reviews and information. 158 carptenter steel was only 3 dollars more than 9310, but I've heard of ..., condition, A-21 is the world's first and only truly stainless carburizing steel, developing a deep, hard, stainless case and a strong, tough, ductile core. It can be considered a stainless version of 9310, 8620, and C158, and has a core minimum ultimate tensile strength (UTS) of 170 ksi or 190 ksi., Jul 7, 2023 · The alloying elements in 9310 steel make its material composition and behavior more complex. This can affect material selection, processing, and quality control, requiring specialized knowledge and expertise to ensure consistent and reliable performance. What Is the Difference Between 9310 Steel and Carpenter 158 Steel?, The NBS .223/5.56 DLC Bolt Carrier Group was designed with strength in mind. Starting with a 9310 Steel Bolt, which is aircraft-grade material, this bolt has a high core strength rating, a high fatigue strength, and a high hardenability rating. 9310 steel, when treated properly, is about 7% better than Carpenter 158 steel, so you know that you will have a …, The material composition, such as Carpenter 158 or 9310 steel, and the choice of coating, from phosphate to Diamond-Like Carbon (DLC), can significantly affect the BCG's performance. Whether you're building a new rifle or upgrading an existing one, understanding the implications of these choices is key to optimizing your AR-15's ..., The two most common types are Carpenter 158, a proprietary chrome-nickel steel alloy, and 9310, a chrome-nickel-molybdenum (cro-nickel-moly) steel with similar material properties. 9310 is a good steel on its own, but it's slightly harder than Carpenter 158 and as a result, requires an assiduous heat treatment to avoid becoming brittle., 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 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 ...