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?See full list on gunbuilders.comApr 29, 2017 · In contrast to this, LWD doesn't sell bulk steel, it sells products expected to perform beyond mil-spec requirements. But Carpenter cares little or nothing about whether bolts made from 158 steel break prematurely or not. Carpenter has never made or even tested a single bolt, and doesn't warranty any of the bolts manufactured using it's 158 steel.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.The most popular steel alloys for BCGs are Carpenter 158 and 9310 steel. The BCG encounters plenty of stress and heat, which makes steel an ideal material. 9310 steel is strong and durable, making it common among manufacturers. Carpenter 158 is more commonly used by the military. Heat TreatmentComplete Black Nitride / Melonite Bolt Carrier Group. Smooth & Protective Nitride coating. M16 Carrier-8620 Bolt-9310 MPI & HPT Tested Shot Peened Upgraded ...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?9310 9310 VAC-ARC steel is a premium quality, high-grade chromium-nickel-molybdenum carburizing steel known for its high hardenability, core hardness, and exceptional fatigue strength. Produced through a vacuum consumable electrode process, 9310 ensures exceptional performance for demanding applications. This alloy is widelyFirearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Better Bolt metal 9310 Steel or Carpenter 158 AR15 COM. The market demands 4150 because it is believes to be so much better than 4140 when in actuality they are nearly identical C 158 is simply Carpenters trade name for P 6 tool steel P 6 and 9310 are very close in composition The 9310 has some molybedenum while the P 6 has more chrome and nickelThis - $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.Additional information. Reviews (1) Custom Engraved AR-15 5.56 Bolt Carrier Group (BCG) At this time we are only offering the engraving on a 5.56 BCG. Other caliber BCG's available per request, simply email or call us. M16 Cut. 9310 Steel Carrier. Carpenter 158 Steel Bolt. 4140 Steel Extractor.If you're drilling through hardened steel, you'll want to use a cobalt drill bit. Find out about the best drill bits for hardened steel in this article. Advertisement Drilling thro...The steel is further classified into different classes, but the most common ones for manufacturing BCGs are 9310 and Carpenter 158 Steel. The BCG faces a lot of heat and stress and these steel variants fit the job perfectly well. They are easy to machine and widely available. The 9310 Steel is tough and durable and is widely used by ...Metal Suppliers Online offers the widest selection & very best prices on Tool Steels Carpenter No. 158 Alloy(tm). ... 158 Plastic Mold Steel(tm) P6 Carpenter No. 158 (tm) Specifications: DIN 1.2735: UNS T51606: Chemistry Data. Carbon 0.05 - 0.15. Chromium 1.25 - 1.75. Iron ...The bolt is machined from 158 tool steel for ultimate durability, has a Type 2 Bolt Face and a black O-ring insert on the extractor. This high quality bolt carrier group is a valuable addition to your 6.5 Grendel build. ... Carpenter 158 Steel. Cartridge Compatibility: 6.5 Grendel. Finish: Nitride / Melonite. Carrier Profile: M16. High Pressure ...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?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.9310 vs 158 steel both have advantages and disadvantages that should be considered when deciding which type of steel to use. 9310 steel is stronger and harder, …Carpenter 158 Vs. 9310; If this is your first visit, ... This thread is about 9310 vs 158! 04-29-17, 18:42 #128. AR-556. View Profile View Forum PostsAERMET® 100 AMS 6532. AerMet® 100 is an iron, cobalt and nickel enriched martensitic steel featuring ultra-high strength, exceptional hardness, and ductility properties. It is very well suited for applications which require both load-bearing capability and ballistic tolerance. With a superior stress corrosion cracking and fracture resistance ...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 …Bet it is cheaper too. This, c158 has to be purchased in massive quantities, while 9310 can be purchase in a quantity more reasonable for a small company. Can also hold up to the stress a bolt is put under as well as 158 with proper heat treating. better actually however, the heat treating must be done right.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.Bolt Carriers made from 8620 Steel, 6A1-4V Titanium or Aluminum Keys made from 4130 Steel 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 replacementJan 16, 2021 · 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 ...Bolt Carriers made from 8620 Steel, 6A1-4V Titanium or Aluminum. Keys made from 4130 Steel. 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.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...High Strength Stainless Steels. An alloy is generally considered a high strength stainless steel when it meets several key requirements. First, it must have an ultimate tensile strength (UTS) of 225 ksi (1550 MPa) or more, and a minimum yield strength (YS) of 200 ksi (1378 MPa). Tensile ductility must be good, with a minimum 10% elongation ...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.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 15Description CarTech No. 158 alloy is a chrome-nickel alloy steel with an analysis representing the best case hardening steel known for parts subject to heavy shock and wear. This alloy is ideally suited for jobs where an extra measure of core strength is required. Fully treated, CarTech No. 158 alloy attains a core strength of approximately 160 ...Apparently the 1b1b6 has a "158 Carpenter Steel bolt", opposed to a "AISI 9310 alloy steel" Bolt on the Nitrided one I'm looking at. Is one superior to the other, or a matter of preference? ... Bolts available in 9310 Steel or Carpenter 158. Obviously, Toolcraft will make whatever the customer wants. They might use different steels and do ...Tampa (Automotive) (OP) 4 Jun 10 12:57. Have issues with 8620 deep case carburized pins, spalling by bearing rollers and have tried 9310 with better results because of the higher core hardness but 9310 barely meets the hardness spec of 60/62 Rc (after finish grinding). Thinking about a tool steel with high toughness like A2 which would easily ...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 ...Technical Specs: • Gas system: Direct Impingement • Caliber: 5.56x45mm NATO/.223 Rem, .300 Blackout • Finish: Nickel Boron Coating • Bolt: 9310 Alloy Steel (High Hardness) or Mil-Spec Carpenter 158 • Carrier: 8620 Aircraft Grade Steel • Extractor: Shot Peened and Case Hardened D2 Tool Steel • Firing Pin: Mil-spec 8740 steel with ...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.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.Catastrophic NiB 9310 bolt failure. One part of a Mil-Spec bolt is that it is made from Carpenter 158 steel, but a more prevalent bolt material on the market is 9310 steel. This is sought after due to its lower cost and in a normal market, plentiful abundance. The downside of 9310 steel is that is has to be properly heated treated when used for ...The most popular steel alloys for BCGs are Carpenter 158 and 9310 steel. The BCG encounters plenty of stress and heat, which makes steel an ideal material. 9310 steel is strong and durable, making it common among manufacturers. Carpenter 158 is more commonly used by the military. Heat TreatmentThe heat treatment process must be more closely controlled with 9310, from what I've read. I'm pretty sure Aermet 100 is a better steel than Carpenter 158 or SAE 9310. It's also made by Carpenter Technology Corporation. The Aermet 100 is about 3 times more expensive than Carpenter 158, but doesn't have lot minimums.Both SAE-AISI 4140 steel and SAE-AISI 8620 steel are iron alloys. Their average alloy composition is basically identical. For each property being compared, the top bar is SAE-AISI 4140 steel and the bottom bar is SAE-AISI 8620 steel. SAE-AISI 4140 (SCM440, G41400) Cr-Mo Steel SAE-AISI 8620 (SNCM220, G86200) Ni-Cr-Mo Steel.Jul 26, 2023 · 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.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:Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Carpenter 158 Melonite / Nitride M16 Ar15 Bolt Carrier Group. $ 260.04 $ 149.00. -43%. Complete Black Nitride / Melonite Bolt Carrier Group. Smooth & Protective Nitride coating. M16 Carrier-8620 Bolt-9310 MPI & HPT Tested Shot Peened Upgraded Extractor Spring with o-ring Made in the USA by a quality manufacturer. 38 in stock.9310 Steel bolt, M16-style bolt carrier group, MPI/HP tested; Gas key MIL-SPEC sealed, torqued and staked ... M16-style MIL-SPEC bolt carrier group and HPT/MPI-tested bolt made from Carpenter 158; Mid-length gas system with H buffer and pinned gas block ... this accuracy would start to suffer but given that the FN Guardian uses a fairly durable ...Business, Economics, and Finance. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. CryptoBearing & 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 ...This BCG weighs a mere 7.9 ounces, but is full-auto ready and functions with 5.56, .223, .300 BLK, and .200 Ruger rounds. The carrier itself is machined from 6A1-4V titanium, while the bolt is sturdy 9310 tool steel. The entire assembly is coated with a diamond-like coating (DLC) for an extra rugged finish.When comparing 8620 to Carpenter 158 you will notice that 158 has a much lower carbon content, and higher Chromium and Nickel content than 8620. 158 is truly an alloy metal, while 8620 is a low alloy metal. However in the world of steels that does not necessarily make it better but different.If I remember right, Carpenter 158 is an exclusive brand spec where 9310 is an ASTM or other standard. Sanwizard Sanwizard. Full Member. Minuteman. Dec 11, 2018 132 72 Charleston South Carolina. ... 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 ...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 …The main limitation of C158 steel bolts is that they are brittle and prone to cracking under high-speed and impact loads. Difference Between 9310 and C158 Steel Bolt Strengths and Limitations of Each Steel Type. 9310 steel sheets have excellent toughness and wear resistance but may need to perform better in high-temperature and …SONS OF LIBERTY BOLT CARRIER GROUP: Best Bolt Carrier in the industry! Bolt: Precision machined from Carpenter Technology No. 158 chrome-nickel alloy. Heat treated per mil-spec, Shot peened per ASTM B851/SAE AMS2430S, Vibratory tumbled. Individual high pressure/proof (HP) test. Full Auto test fired at assembly.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.Mil-Spec Carpenter 158® steel bolt; Shot Peened for Increased Strength per Mil-Spec; Additional information. Weight: 2 oz: Dimensions: 3 × 1 × 1 in: Reviews There are no reviews yet. Only logged in customers who have purchased this product may leave a review. Share On Facebook. Tweet This Product. Pin This Product.On the hardenability of steel, 4140 heat treatment has good strength and good comprehensive mechanical properties, good manufacturability, high yield. The highest temperature is 427 degrees Celsius. 4140 strength, high hardenability, and good toughness, quenching deformation of small, high temperature creep rupture strength, and high.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.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 ...It also exhibits good strength, high toughness, hardenability, core strength, and very high fatigue strength. When annealed, 9310 has good ductility, machinability, and cold working properties. Additionally, 9310 is easily welded. It is typically used in gears, crankshafts, heavy-duty gears, the automotive, trucking, and aerospace industries.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...For a free quote or To find out more about 9310 Alloy Steel, Call us on 714-632-0140. Contact Us. Friend Metals offer 9310 alloy bar with AMS 6265 specifications. Explore our forging options for high-quality alloys. Visit our website for more details.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 ...Bolt Carriers made from 8620 Steel, 6A1-4V Titanium or Aluminum. Keys made from 4130 Steel. 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.C-158 is simply Carpenters trade name for P-6 tool steel. P-6 and 9310 are very close in composition. The 9310 has some molybedenum while the P-6 has more chrome and nickel.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.This is significantly stronger than the Carpenter 158 steel called out by the military and vastly superior to many materials used in civilian bolt production. What is S7 Tool Steel? a. The S-Type tool steel is specifically designed to resist the effects of shock at both high and low temperatures. What happens if I break your Relia-Bolt? a.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 ...IIRC, the original specifications for the GI issue model were for AQ-9310 (aircraft quality). The bolts were supposed to be good for 75K rounds, ... I use this company for my Carpenter 158 steels industrial metal sales it is moderatly priced and they ship quick give em a try ! T. truckeic Plastic. Joined Sep 12, 2017. Sep 3, 2019Some steel grades accept nitriding more readily than others, such as low-carbon, low-alloy steels, including: Nitriding 135M; GKH®W; GKP®YW; When comparing nitriding vs. carburizing, a nitrided steel's surface (case) gets harder but not as deep as a carburized steel part. However, nitriding does offer superior corrosion resistance.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 …Manufacturing: Carpenter 158 steel is manufactured using a specialized vacuum-melting process to ensure superior quality and consistency. II. Benefits of Carpenter 158 Steel: Exceptional Strength: Carpenter 158 steel exhibits excellent mechanical properties, including high tensile and yield strength. It can withstand extreme pressures, making ...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 …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.Dec 12, 2023 · 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?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.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 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...Mar 8, 2020 · 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."A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed. PSA AR-15 complete MPI bolt assembly, made of carpenter 158 steel, shot peened. Fully machined 8620 steel extractor, black extractor insert. Mil-Spec Manganese Phosphate finish, MPI tested.8740 steel firing pin with hard chrome finish. Magnetic particle inspected. Proudly made in the U.S.A. 6.5 Gendel 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.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 ...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 15You are comparing the cost of the raw material with the cost of the finished bolt. 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.Carpenter 158 comes from one place, and one place only, Carpenter Technology of Reading PA. AISI 9310 steel can be sourced from any number of foundries, Carpenter being one of them. Needless to say, 9310 is more easily obtainable. Posted: 12/16/2016 12:41:00 AM EDT. [#5]Mil-Spec Carpenter 158® steel bolt; Shot Peened for Increased Strength per Mil-Spec; Additional information. Weight: 2 oz: Dimensions: 3 × 1 × 1 in: Reviews There are no reviews yet. Only logged in customers who have purchased this product may leave a review. Share On Facebook. Tweet This Product. Pin This Product.Typically the AR15 community looks for C-158 which is a blend of steel from Carpenter. 9310 is also a Carpenter product, but the make up of the steel differs between the two. What I surmised was that 9310 should be a better bolt material as long as it is properly heat-treated. It is less brittle than C-158 and theoretically stronger as long as ...9310 Carrier/Bolt Steel. This is superior to 8620. Its development came after the AR15 was originally designed. This steel provides enhanced heat and pressure resistance. The tensile strength is 910 MPa, and the yield strength is 570 MPa. You will sometimes find that 9310 steel is used in the forging of both carrier and bolt. Carpenter no. 158 .... Mil-Spec Carpenter 158® steel bolt; Shot Peened forLocationCalifornia. Posted July 20, 2014. I hav Build a list of your favorite alloys. Click the heart icon on any alloy to being creating your account. Premium quality chromium-nickel-molybdenum carburizing steel produced by the vacuum consumable electrode process. It has high hardenability, high core hardness, and superior fatigue strength. DetailsFor the serious AR-15 builder or if you& A: Despite being on paper a stronger material choice after heat treatment, most of the bolt failures I'm seeing are 9310 bolts. I like our C158 bolts because ...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. Manufactured to precise tolerances, these high-quality repl...
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