Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.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. CryptoThis high-strength, low-alloy steel is also known for its excellent machinability. The 9310 Steel Bar is popularly available in round shapes, and is widely used in the automotive industry for manufacturing axles. Additionally, it offers good resistance to wear and abrasion, making it the ideal choice for producing gears and shafts.Inconel® 718 AMS 5662 available at Rockwell Industries (Inconel alloy 718, inco718, inc718, alloy718) is a nickel-chromium-molybdenum alloy designed to resist a wide range of corrosive environments, pitting and crevice corrosion. Rockwell Industries Inconel 718 nickel alloy also displays high tensile and creep-rupture properties at elevated ...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.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 have a dependable BCG, when you ...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, …I would assume that 9310 has the potential to be heat treated, stress relieved, hardened, shot peened, etc into a good 5.56 bolt. But it would be folly to overlook the truly massive amount of research that has gone into the Carpenter 158 bolt we have now.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.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.Jun 29, 2013 · 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.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 …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 ...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 ...9310 steel vs 158 carpenter. 9310 steel vs 158 carpenter. Posted on October 16, 2023 05:10:01 AM | Views: 628Carpenter 158 Stockist Round Bar Forging Stock, Equivalent Carpenter 158 of Technical Datasheet Material Inventory Steel Forging, Specifications of Carpenter 158 Material Properties Performance specifications. ... Steel strip: THK0.15 ~ 2.50 X W8.0 ~ 200mm Flat bar (Thickness X width): 10 ~ 350 X 15 ~ 850mm Length: Fixed length or random length ...Alloy Steel 9310 specializes in high core strength applications. 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.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.Features a carrier made from Carpenter 158 Tool Steel, and an 8620 steel with an M16 cut bolt. High Quality. ... The Nickel Boron Coated 5.56 Bolt Carrier Group features a bolt fashioned from 9310 Steel, with the carrier made of 8620 Steel. A manufactured in America component, this bolt carrier weighs 11.52 ounces and has forward assist ...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. ...Bolt Material: Machined from Mag Particle Inspected Carpenter 158 or 9310 Steel. Barrel: 16" M4 Profile, Chrome Lined with Compliant Welded Muzzle Brake. Barrel Material: 4150 Chrome Moly Vanadium 11595E Steel w. M4 Feed Ramps. Rifling: 1 Turn in 9" - Right Hand Twist.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Though 9310 steel bolts are highly durable and strong, they may not be suitable for extremely high-temperature and corrosive environments. C158 Steel Bolt. C158 is a high-strength steel alloy that has excellent durability and toughness. These bolts are heat-treated and tempered for exceptional strength and performance in challenging environments.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.9310 or Carpenter 158 (C158) Steel: Bolt Finish: Black Nitride: Caliber.223 | 5.56 NATO | 300 Blackout: Extractor O-ring: Viton; Mil Spec: Carrier Material: 8620 Steel, Toolcraft Proprietary: Carrier Finish: …The interesting thing about Carpenter 158 is that it is a proprietary steel alloy and its formula and method of manufacturing are not publicly defined. Therefore, there is no SAE standard for it and the sole manufacturer of this steel is a company called Carpenter Technology in Pennsylvania. ... In general, bolts made of 9310 steel are the ...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: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.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 ...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.We did this for y’all, figured enough people asked so we would provide, expanded our bolt offerings to include five different AR15 bolts using carpenter 158 steel 5.56 standard 5.56 K-SPEC enhanced dual ejector LH 5.56 K-SPEC enhanced dual ejector 7.62x39 K-SPEC enhanced dual ejector 458/450 K-SPEC enhanced dual ejector9310 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.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 …The Carpenter 158 Bolt is heat treated, shot peened, precision ground for perfect dimensions, and MPI Tested. The 4140 Billet Gas Key is properly torqued with Grade 8 fasteners, and properly staked to ensure reliability. The 4140 Billet Cam Pin is nitride treated for wear resistance. ... 9310 Steel: Carrier Material: 8620 Steel: Country of ...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;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 ...Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Great discussions are par for the course here on Lifehacker. Each day, we highlight a discussion that is particularly helpful or insightful, along with other great discussions and ...Bolt Material: Machined from Mag Particle Inspected Carpenter 158 or 9310 Steel. Barrel: 16" M4 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.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 ...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 ...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.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.LESCALLOY 9310 VAC-ARC steel has machinability rating of 40% of B1112 steel. FORMS AVAILABLE Billets; hot rolled bars, cold drawn and centerless ground bars; forgings. APPLICATIONS Aircraft Engine Gears and Pinions HEAT TREATMENT Annealing: Heat uniformly to 1475-1575°F (802-857°C), furnace cool. Normalizing: Heat uniformly to 1650 …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.Dec 12, 2023 · Definition: Carpenter 158 steel is a high-strength, alloy steel specifically designed for use in critical firearm components such as bolt carriers, bolts, and barrels. Composition: It is primarily composed of iron, carbon, chromium, molybdenum, vanadium, and other alloying elements.In terms of properties, both 8620 and 4140 steel have excellent strength and wear resistance. However, what sets them apart is their hardness level and the amount of carbon they contain. 4140 steel is much harder than 8620 steel, making it a better choice for applications requiring high durability and resistance to wear and tear. On the other ...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 ...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.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.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 ...Jan 1, 2020 · 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.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.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 …Bolt Material : Carpenter 158+ Carrier Material : 8620 Steel Coating : Nanoweapon MPI & HPT : Yes Full-Auto Rated : Yes. My Take. This is the most expensive option on this list. However, if there was ever a piece of equipment to spend a little more money it is the BCG. The Geissele BCG is the best on the market in my opinion.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.Chemical Composition. One of the biggest differences between 309 and 316 stainless steel is their chemical composition. 309 stainless steel contains 22% chromium and 12% nickel, while 316 stainless steel contains 16% chromium, 10% nickel, and 2% molybdenum. Adding molybdenum sets 316 apart from 309, further increasing its corrosion resistance.Bolt Material: Machined from Mag Particle Inspected Carpenter 158 or 9310 Steel. Barrel: 18" Fluted Medium Profile, 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.The firearmhistory had some great info. I suppose can 9310 be a better bolt material than C158, sure but it has to be heat treated properly in order to do so, and the improvement is less than 8%. So, as always, better make sure you're buying from a reputable manufacturer. I wouldn't pursue a 9310 bolt simply for the sake of having one made out ...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 …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 ...