Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.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 ...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. 9310 is about half the cost of P-6. Which is better? Don't know, I barely made it through that class. IMO, the heat treat is probably more important than the alloy comp.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."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 …On the other hand, Carpenter 158 steel is chosen for its toughness, shock resistance, and fatigue strength. As such, it sees use in firearm components, gears, shafts, and general machinery. What Is the Difference Between 9310 Steel and 8620 Steel? 9310 steel and 8620 steel are low-alloy steels with some key differences between them.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!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.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.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.(RTTNews) - Below are the earnings highlights for Carpenter Technology Corp. (CRS): Earnings: $6.2 million in Q2 vs. -$29.4 million in the same p... (RTTNews) - Below are the earn...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 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.(RTTNews) - Below are the earnings highlights for Carpenter Technology Corp. (CRS): Earnings: $6.2 million in Q2 vs. -$29.4 million in the same p... (RTTNews) - Below are the earn...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.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 nickel.Dec 14, 2016 · As I understand it 9310 has become a common option for bolts because it is easier to get in smaller quantities than Carpenter 158. 9310 has the properties necessary for a bolt provided it has the proper heat treatment. So, from this standpoint quality control can have more to do with bolt performance and lifespan than C158 vs 9310.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Technical Data Sheet. Alloy 9310 Vac-Arc (LESCALLOY 9310 VAC ARC ®) is a carburizing steel which has high hardenability, high core hardness together with high fatigue strength. The premium quality of alloy 9310 make it ideally suited for critical aircraft engine gears. Alloy 9310 Vac-Arc (LESALLOY 9310 VAC ARC ®) is available in bar (round bar) .Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.SKU 51655115274 Brand Palmetto State Armory Model Number 51655115274 UPC 51655115274 DETAILS Manufacturer: Toolcraft Caliber: 5.56/.223 Bolt Finish: Nitride 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 ...The bolt face is made from 158 carpenter steel or 9310 depending on supply, shot peened, and magnetic particle inspected. The carrier is cut to full auto M16 dimensions and is machined from 8620 steel and ground to exact Mil-Spec dimensions. The entire AR-15 BCG is black Nitride finished to improve surface hardness and smoothness over ...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.The proprietary alloy used by LMT's enhanced bolt outclasses the industry standard of Carpenter 158 & 9310 Steel commonly used for bolts. The material and grooves cut into the locking lugs (to relieve stress) make a bolt that is built to last in a suppressed full auto system. BCG Coating/FinishesMil-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.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.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.The bolt is CNC machined from heavy duty 9310 alloy steel. 9310 steel has a high core & fatigue strength rating, a high hardenability rating, and when properly treated it is actually about 7% stronger than the "mil-spec" Carpenter 158 steel. The bolt is then shot peened (stress relieved) and finished with the same Ion Bond DLC as the carrier.Mar 7, 2013 · 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 ...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 ...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 ...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...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.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 ...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 …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 steel bolts have had a measurable reduction in bolt lug shearing vs C158 in the Grendel platform and is why its usage is almost universal in that role. In high bolt thrust applications, it has been the best option for steel bolts. ... by comparison to Carpenter 158, AISI 9310 has several elements present in its composition that are ...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.Mar 7, 2013 · 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 ...Simply the best left-handed 5.56 NATO bolt carrier group on the market! Toolcraft 5.56 NATO Black Nitride Bolt Carrier Group is a Full-Auto M16 BCG manufactured using the finest U.S-sourced raw materials. The Black Nitride coating vastly increases the hardness of the steel, prevents corrosion, is highly resistant to wear, will not flake (it's ...Apr 29, 2017 · 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 PostsBolt Material: Machined from Mag Particle Inspected Carpenter 158 or 9310 Steel. Barrel: 16″ Chrome Lined with Yankee Hill Flash Suppressor. Barrel Material: 4150 Chrome Moly Vanadium 11595E Steel ... Barrel Material: 4150 Chrome Moly Vanadium 11595E Steel. Rifling: 1 in 10″ - Right Hand Twist. Stock: Magpul CTR Carbine Stock with Magpul ...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 alloy steel is a low carbon nickel-chromium-molybdenum case-hardening steel, with good strength and toughness properties. It shows high hardenability, high core hardness and high fatigue strength. Data are typical, are provided for informational purposes, and should not be construed as maximum or minimum values for specification or for ...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.Jun 10, 2019 · Target said: I read an article by Faxon ( manufacturer of barrels and other parts) and they claim that 9310 steel is better than Carpenter 158. C158 is MilSpec and at the time. a good steel. 9310 is newer and 7% better. Faxon has a good reputation for barrels. so I will take their word on this.Subscribe to be notified when this product is back in stock. SKU: F4-15-BCG-NiB Categories: BCG, Parts. Description. Additional information. Reviews (1) Material: 9310 Steel Bolt (Carpenter 158), 4140 Billet Extractor, 8620 Steel Carrier (Full Auto) Features: Magnetic Particle Inspected (MPI) Bolt. Finish: Premium Nickel Boron Finish or Black ...Sep 6, 2023 ... 9310 steel is tougher and more impact-resistant, while 158 steel is more corrosion-resistant. When choosing between the two, it's important to ...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.Sep 5, 2023 · September 5, 2023 | 4:33 pm. When choosing high-performance bolts, steel type cannot be compromised. The steel used determines the bolt’s quality, strength, and durability. Among the various types of steel used in bolts, 9310 and C158 stand out as top contenders. Both are exceptionally strong and widely used in different industrial applications.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.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 ... Bolts available in 9310 Steel or Carpenter 158; Lifetime Warranty. Our products carry a lifetime warranty. Simply put… Should any of our products fail, return it to us for a brand new replacement. Home; Products; Quality Requirements; Coatings;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.There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown. For each property being compared, the top bar is SAE-AISI 52100 steel and the bottom bar is SAE-AISI 9310 steel. SAE-AISI 52100 (G52986) Chromium Steel SAE-AISI 9310 (1.6657, G93106) Ni-Cr-Mo Steel.9310, and Carpenters 158, are two distinct different types of steels. Both made for different kinds of applications, and both with different properties. ... I recently talked with some Carpenter Steel engineers, the earliest mention (data sheets) that we could find with C-158 even listed was 1981.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?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. Batch MPI and HPT tested. Tensile strengths of 1550-1600 mpa, or ...AR-15 bolts are typically made of high-strength materials like Carpenter 158 steel or 9310 steel, which provide durability and reliability under extensive use. 3. How is the AR-15 bolt different from other rifle bolts?Enter 9310. This is an AISI standard grade of tool steel that, when properly heat-treated, is approximately 7% stronger than Carpenter 158. With heat treatment, ...9310 Alloy Bar. 9310 is low alloy steel containing nickel, chromium and molybdenum. It has high core hardness and high fatigue strength. This alloy is best machined in the normalized and tempered state. All of this makes 9310 excellent for aircraft parts.