Carpenter 158 vs 9310

MPI = Magnetic Particle Inspected. Nitride is my choice over phosphate as it is an actual treatment and it's generally "slicker" and more corrosion resistant. Posted: 11/23/2017 3:40:51 PM EDT. [#2] Toolcraft does not make their own bolts. Just carriers. The bolts they use are top of the line. They offer 158 and 9310.

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 ... 11-17-13, 07:36 #32 Palmguy Senior Member Join Date Oct 2007 Location NW Florida Posts 2,553 Feedback Score 42 (98%) Originally Posted by Iraqgunz C158 is around $10.33 per pound and it must be purchased in huge lots.It has been the "Mil-Spec" since. Since the creation of Carpenter 158, the metals industry has continued to innovate, creating new blends of steels. 9310 is a AISI standard grade of tool steel that makes it about ~7% stronger than "mil-spec" Carpenter 158 steels, when appropriately treated.SAA AR-15 .223/5.56 Bolt Assembly Carpenter 158 - MPI Tested. Replacement Assembled Bolt for the .223/5.56/300AAC caliber AR-15 (or new builds). Assembled, Phosphate finished AR15 Bolt. Completely assembled with standard bolt parts: Extractor assembly, Ejector assembly, Gas Rings. Works with any AR15 standard Carrier of any finish (Phosphate ...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.Jan 1, 2020 · Carpenter 158 was what was spec'd in the 1950's when the rifle was made. One company in the world makes it, and it's Carpenter. Other metal alloys have come along since 1950-whatever that are definitely superior, I think 9310 is fine. So is polishing a radius on the cam pin hole in the bolt, which is where the cracks usually happen.

Aug 21, 2019 · Bren · #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 steel used is properly hardened, but I don’t think it’s technically Carpenter 158. However, at under $170, an HPT and MPI-tested BCG is a great value. You should know that many would say ... · 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 …Mar 26, 2015 · 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. View All Quotes. better actually however, the heat treating must be done right. Carpenter 158. Some consider Carpenter 158 the best steel grade for a bolt. It is chrome-nickel alloy steel. Industry specs say when case hardened, this is ideal for parts that experience heavy shock and wear. That describes a bolt perfectly. Carpenter Steel is also a proprietary alloy only available from Carpenter Technology. I find it ...

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.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. View All Quotes. better actually however, the heat treating must be done right.... 9310 alloy steel as an acceptable bolt material and substitute for Carpenter 158 (Carpenters brand name AISI P6 Spec mold steel). 8620 Carrier. 9310 Bolt MP ...Toolcraft Logo'd Premium 5.56 Nickel Boron BCG with Carpenter 158 Bolt - 5165449729 . Rating: 93%. Regular Price $199.99 Special Price $99.99. Add to Cart. Add to Wish List Add to Compare. PSA Custom AR-15 Charging Handle Ambidextrous . Rating: 93%. $56.95. Add to Cart. Add to Wish List Add to ...

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May 1, 2021 ... 9310 Steel – Keep in mind: even if you have a “mil-spec” BCG, most of the bolt components will actually be made by 9310 steel or Carpenter 158 ...May 29, 2022 · #1. For when the gun store expert says, "If it ain't mil-spec, it ain't shit". The C158 specified for M16 bolts dates to the 60's. Technology has advanced a little since …Toolcraft Logo'd Carpenter 158 Nitride Full-Auto Bolt Carrier Group . Rating: 91%. Regular Price $129.99 Special Price $99.99. Add to Cart. Add to Wish List Add ... Jul 25, 2013 · The truth is, the standard Mil-spec C-158 (Carpenter 158) bolt has a number of factors limiting its performance, not the least of which is that the life expectancy of such bolts is only about 6,000 rounds. In fact, standard bolts will start to show stress cracks on the locking lugs adjacent to the extractor cut after only 3,000 rounds. 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 ...

As to the argument about 9310 not being mil-spec for the bolt, that's true. But, properly done 9310, as with one of the suppliers listed is at least as good. Mil-spec does not always mean better, sometimes it does. Toolcraft offere both 9310 & C-158. The others offer only 9310,,Made in USA. Bolt is made of Mil-spec Carpenter 158 steel, Shot peened, High pressure tested and Mag Particle Inspected. Gas key is machined out of bar stock, chrome lined phosphate coated, and secured with grade 8 fasteners and staked per mil-spec. Bolt carrier is phosphated outside and chrome lined inside. Laser engraved with the PSA logo.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. 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.Central NY. 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.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.CarTech® No.158®Alloy Page:1of7 Identification UNSNumber • T51606€ TypeAnalysis Singlefiguresarenominalexceptwherenoted. Carbon 0.10 % Manganese 0.50 % Silicon ...C 158 vs 9310 Bolt. Just ordered a Aero Precision 6.5 bcg with bolt. 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.BOLT CARRIER GROUPS ARE WHERE THE RUBBER MEETS THE ROADWhile most people will say that the BCG is the heart of your rifle, most people don’t know why or whatThe 9310 steel is another common material for bolts and carriers, but it’s cheaper and not as strong as the Carpenter 158. The tensile strength of 9310 steel comes in at 910 MPa, while its yield strength is 570 MPa. Finally, the 8620 steel is the cheapest option, and you can usually find it on the carrier, not the bolt.9310 ALLOY STEEL – AMS 6265 VAR – UNS93106 DATA SHEET GENERAL CHARACTERISTICS: 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 …

158 Mil Spec which means 158 material is on the TDP but as soon as the next TDP holder submits this material change to 9310 the US Government will accept it, because there is not any durablity or function change. 158 is cheaper but 9310 can be purchased in lower amounts, which for most manufactures is even more important.

Firearm Discussion and Resources from AR-15, AK-47, Handguns and more! Buy, Sell, and Trade your Firearms and Gear.Nov 14, 2013 · 11-14-13, 06:26 #1 eperk Member Join Date Aug 2012 Location Northeast MS. Posts 460 Feedback Score 0 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. Is there technical data to show that c-158 is superior? Carpenter 158 is 9310 with case hardening It's not, Carpenter 158 is a propitiatory steel alloy. It has similar (arguably superior) properties to 9310 but it is not 9310. $ 185.00 $ 158.73 Add to cart. Sale! FREE SHIPPING ITEM! Faxon 308 WIN 16″ Big Gunner Barrel $ 239.00 $ 201.30 Add to cart. Sale! FREE SHIPPING ITEM!Jun 10, 2019 · Central NY. 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. Jul 18, 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? When an AR-­15 experiences a catastrophic failure, it is almost always the bolt that breaks. It’s either a lug on either side of the extractor or the bolt body where the cam pin passes through it. LMT’s enhanced bolt is much tougher than anything made from Carpenter 158 or 9310 steel.There are different grades of 9310. Vac Arc being the highest. More and more bolts are being made from it because of availability. 158 is controlled by Carpenter and you have minimum weight orders to meet or they will not sell to you. Some say 9310 has a slight advantage over 158, but looking at the chemical makeup, they are very similar.

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In a rifle bolt there are only two things we need to be concerned with: the physical properties of the steel (hardness, strength, elasticity, etc), and shape. The physical properties of Carpenter 158 and 9310 are similar, and as long as the finished product passes gauging. the shape is correct.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.Largest inventory of Pyrowear 53 worldwide. AMS 6308, Lesco 53, x53, Sikorsky ss9706, Bell 299-947-334, Lesco 53, x53.Strengths and Weaknesses of Both Steel Types. 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 ...PSA Logoed Premium 5.56 Nickel Boron BCG with Carpenter 158 Bolt - 516446450 . Rating: 94%. Regular Price $199.99 Special Price $99.99. Add to Cart. Add to Wish ...SKU: 5165449729 UPC: 5165449729 MFR#: 5165449729 Nickel Boron Finish Milspec Carpenter No. 158® steel bolt Shot Peened Bolt High pressure tested Mag particle inspected Gas Key Hardened to USGI Specifications Gas Key Grade 8 Hardened Fasteners Gas Key Staked Per Mil-Spec Tool Steel Extractor Extractor Spring Extractor O-ring Insert ToolCraft Logo PA-15 Engraving ToolCraft Premium Carpenter 158 ...Apr 9, 2021 · If fact, 9310 response to thin section quenching is better that Carpenter 158. And, taking the leap between this statement:". . . 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 . . ." and this statement:  · I've read about this in a few different places, the jist of it is that 9310 is easier to procure, easier to machine (as opposed to injection molded for c-158) and only …Jul 14, 2014 · 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? 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/Finishes ….

C 158 vs 9310 Bolt Just ordered a Aero Precision 6.5 bcg with bolt. Bolt is made of 158 carpenter instead of the 9310 i notice most others are. Is the 158 going to ...Features a carrier made from Carpenter 158 Tool Steel, and an 8620 steel with an M16 cut bolt. High Quality. ... Steel is further classified according to availability as well as easily machined variants. 9310 and 8620 steel and the high core strength Carpenter 158 steel are the recommended material for military specification BCGs.Black Nitride AR15 Bolt made from Carpenter 158 steel. The bolts are also Shot Peened and MPI (Magnetic Particle Inspected) and feature Billet Machined ...Available in either 9310 or C158 Steel Bolt. 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 not a coating, it’s a ...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 10Apr 28, 2017 · 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 11 Our bolt assemblies are shot-peened and made from 9310. They are batch high pressure ... 9310 or carpenter 158. Finish: Black Nitride. Continue Browsing. Linear ...Apr 29, 2017 · 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 …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. Carpenter 158 vs 9310, [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1], [text-1-1]