Both are alloys with excessive strength and wear resistance. For AR500 steel plate, the nominal harness is 500, and its range is 460 to 544. However, this increase in strength and. AR400 = 400 brinell harness . Details. Request a Quote. AR450 is not recommended for machining, but is formable. Each mill has slightly different alloys and heat treatments. AR 500 Steel Plates: Heat Treated for Higher Hardness Rating. When I got them, one was marked AR400. In ‘standard’ hat sizing, this falls along the border of M/L sizing. In our high impact applications the ENDURA lasts more than twice as long as AR400 so it becomes more economical once we start replacing worn parts. bucket components, construction equipment and wear plates used in plows and farming equipment. Most plate product numbers range from 200 to 500 — for example, AR 200, AR400 or AR500. It's a lot harder than regular plate. The highest deposition rate gas-shielded flux-cored wire is E70T-1. 308 just knocked the paint off. . Since so many attachments are built from mild steel, we will deal with it first. Call or Email Us For a Free Quote. 315”. Learn more about abrasion-resistant steel and the differences between AR400, AR450 and AR500. ) Hot Roll;Your Reliable Steel Source. Just make sure it's actually AR500. AR500, or AR500F steel, is a high-carbon. AR400 steel is a high-carbon alloy designed explicitly for abrasion and wear resistance. Specifications * Chemistry may vary depending on. AR400 and AR500 steel. However, this increase in strength and abrasion resistance will make the steel less malleable. AR450: 430-480 BHN This material is slightly harder than AR400 and is also a popular material to make grinder screens. The . AR500 hardness in Brinell: 450 minimum / 500 nominal. Connect Facebook Twitter Youtube LinkedInEH 450, AR450, AR500, NM 450. There are different types of steel, for example, AR400 OR AR500, that are produced to a specific hardness. AR400; AR450; AR500; Manganese Steel; AR250; A514; Chocky Bars; 4150 Steel Bar; Scrap & Recycling. . At my local steel yard I can buy AR 400 (Abrasion Resistant) in 3/8 thickness for $1. Available in . While A514, AR400 and AR500 are the most widely used Q&T steel plate grades, other Q&T plate grades are used for more specific applications, including the following. Call us at 800-321-8500 for questions or comments. Weight difference is basically a wash. 308 is not allowed cause supposedly it will go through, where as 500 it won't. User NameAr400 Vs Ar450 Vs. 118", and as sheet in thicknesses of 0. 00/pound. We have shot them well over a thousand times from 300 to 1200 yards with up to a 300 WM with no signs of wear or damage. All times are UTC - 8 hoursThe tensile strength is 400-550MPa; the yield point is greater than or equal to 250MPa. SLS 600 ® Induction Wear Pipe; CLIF-CLAD ® Overlay Pipe; G 2T ® Ceramic Lined Pipe; Steel Round Bars. You'll thank yourself if you ever really need to use it. Apples and oranges comparison, but it still makes a difference. El AR400 tiene un límite elástico de 250 ksi en comparación con sólo 50 ksi en AISI 1045. When it involves figuring out the right type of steel to meet the needs of your project, it may take time to determine between ar400 and ar500. Amarillo. Source: I have thousands $ spent onar550, ar500 and ar400 steel. AR 500 Steel – What is the Difference? Abrasion Resistant (AR) steel contains carbon and alloys that make it harder than other types of steel. I drilled a 1/4" pilot, and then drilled to 1-1/8" with a 118 deg 1/2" shank S&D bit. . 최소 4배~10배의 내마모 수명을 보유한 특수강입니다. * Glancing impact shots - handgun rounds In three (3) out of six (6) shots [3 center shots, 3 glancing] with 9mm FMJ ammunition against the cylindrical samples there was no spall in front of the samples. The . 1/4” AR400. Note that excessive preheat may anneal the base material. MOA Targets LLC 3955 Wild Horse Rd Reno, NV 89510 (775) 623-7152 The names of AR plate products typically indicate the hardness of the material. The protection of landmines and explosives. Both 8" AR400. So they said they would cut me a deal on the next. Uses for this plate include material handling. Here is an experiment to try. As a premier supplier of AR400, AR500, A514, Chromium Carbide Overlay, Manganese Steel, Armor Plate & More, we have a long history of providing innovative solutions to the abrasion, impact and wear resistant steel markets. Yes it can be done, drill your hole as large as the customer will allow, buy a good tap (OSG, Emuge, Guhring, Nachi), use a good tap lube (Moly-Dee ), and go sloooooUse a cut tap and not a form tap, because AR has a super high tensile strength. We would like to show you a description here but the site won’t allow us. There is also AR500, but its more work to weld. They also undergo ballistic testing to determine the velocity a weapon. While targeted at more severe wear conditions, Hardox ® 600 can still be cut and welded, making it an excellent choice for high-performance applications. AR450 and AR600 steel plates are also available, but they’re a. At Clifton, for steel to be considered AR400, the plate must measure between 360 and 440 BHN. AR200 VS AR400 vs AR450 vs AR500: AR steels are governed by a level of hardness, but not a specific chemistry. The “400” in its name indicates the Brinell hardness value. Another difference is their Brinell Hardness. Difficult to weld: Higher alloy and greater Carbon content require precise preheat and welding procedures. AR400 vs AR500 Guns & Ammo Discussion : Alberta Outdoorsmen Forum > Main Category > Guns & Ammo Discussion: AR400 vs AR500 User Name: Remember Me?. Hardox® 450 combines good bendability and weldability with an option for guaranteed impact toughness (Hardox®. I bought a couple AR400 targets from the local metal supplier, 1/4" IIRC, bent the hell out of them with 300WM @ 525 yards. Various thicknesses & sizes available. AR500 – Understanding Abrasion Resistant Steel In construction and fabrication, the grade and composition of. SKU. This is a high-carbon alloy steel that is perfect for rugged applications that require high wear resistance. T1 Steel vs AR500. I was at our local steel yard picking up material for a project and saw they have some nice half silhouette targets at a descent price (considering the high price of steel). hardened surfaces, Ultima 601 becomes the ideal abrasion resistant product that can handle the rigors of extreme maintenance problems. ⓘ. 360-440 BHN Typically. Yields for AR500 steel are in the region of 1100 MPa with tensile strengths of about 1250 MPa. AR450 and. AR400 / 400F Abrasion Resistant Steel Plate Leeco ® Steel stocks and supplies large quantities of AR400 steel plate, which combines surface hardness with formability. AR450 and AR500 are similar to AR400, the difference being a higher Brinell hardness value. I have some experience with welding AR400. MIL-A 46100 (latest rev. Reduce plate thickness up to 25% vs AR 500 (ie. * Glancing impact shots – handgun rounds. AR400 steel has a variety of benefits that makes it an ideal substitute for almost any application where excessive wear is a problem and ease of fabrication is needed. Because the ar500 is a higher-grade steel, its miles generally extra expensive than the. AR400-Mild Steel. AR400 vs AR500 steel are two popular types of abrasion-resistant steels used in various industries. Cost effective and available in a wide. When it comes to cutting AR500 steel, you should be ready to learn certain factors. The typical Brinell Hardness range is 470-530. AR500 actually has pretty good customer service, though shipping takes some time. The technical difference between AR400, AR450 and AR500 is the Brinell Hardness Number (BHN), which indicates the material’s level of hardness: AR400: 360-440 BHN Typically AR450: 430-480 BHN Typically AR500: 460-544 BHN Typically. The AR400 are premium abrasion resistant steel plates that are heat-treated and exhibit through-hardening. At 50ksi, a higher strength steel than A36. ) MIL-A 12560. Referring to the hardness properties, AR500 recorded the highest hardness at 47. AR450: 430-480 BHN This material is slightly harder than AR400 and is also a popular material to make grinder screens. 25x the tensile strength of AR400, as well as a higher yield strength and tensile modulus. A quenched & tempered, through-hardened, abrasion-resistant grade of steel plate. AR400 vs AR500 steel plates are two of the most popular abrasion resistant steel plates in the world. AR450: 430-480 BHN Typically. We cover the complete spectrum of impact resistant & high strength steels ( AR400 AR450, AR500) to stay competitive in the industrial market. 3-2 Since 148 Steel Plate & Sheet Alro Steel Metals Guide ASTM A-36 Hot Rolled Plate Typical Analysis* ASTM A-36 Carbon (C) max % 0. 1-800-745-3962 1-800-745-3962 [email protected] ShippingAR400 & AR450 have excellent weldability that customers rave about and can be welded with simple procedures and common consumables such as E7018 inclusion shape control. The Benefits of AR Steel? Jindalai Steel supplies AR steel plate in large and small volumes to designers and plant operators looking to extend the service life of critical components and reduce the weight of each unit put into service. AR400, AR450, AR500등급으로 구분합니다. User NameAR400 vs AR500 Guns & Ammo Discussion. Contact. 내마모강 (AR400,AR500) 2018. There are several grades of abrasion resistant steel, including AR200, AR235, AR400, AR450, AR500 and AR600. 우리는 당신이 선택한 대량 핫 판매 제품을 재고 있습니다. Often used in construction and mining applications, it can also be found in a variety of other industries. Action Target only uses AR500 or AR550 steel be-cause they provide the perfect balance of toughness and strength for shooting. Rhino-Tuf® EZ (AR400) Wear Plate; Rhino-Tuf® EZ (AR400) Wear Bars; Redi-Rail® (Formerly Kromite® CD60) Custom Wear Rail; Ultima™ 501 (AR500) Wear Plate; Ultima™ 601 (600 BHN I. Details. ASTM A131 A&B / ABS A&B; ASTM A131 / ABS AH36 / ABS DH36 / ABS EH36; API 2H Grade 50; ASTM A633; PVQ Steel Plate. Hide/Show specific columns Edit. ASTM A516/ ASME SA516; ASTM A537/ ASME SA537; ASTM A283/ ASME SA283; ASTM A285/ ASME SA285; Armor & Ballistic. Very tough to drill a hole in it. AR400F is produced through austentizing, water quenching, and tempering. I have also used ar500 on a number of heavy equipment repairs and it is real hard. The figures below are representative of 15mm thick AR400 and AR500 plates. 1. However, due to their hardness, they can. We would like to show you a description here but the site won’t allow us. AR400 steel plates are suitable for applications that requires a good level of abrasion resistance (i. High Strength Steels. or monthly payments as low as $19. The AR500 steel usually has a Brinell hardness rating between 460 and 550, and it averages at around 500. For rifle use, 3/8″ AR500 is going to be the minimum recommended thickness due to the substantial increase in energy over pistol rounds. AR500 Steel works for both handguns and rifles; Lower grades of steel can be. A572 grade 50 steel plate is a high-strength, low-alloy plate, specified for bridges, higher strength structural duties, and light pressure vessel requirements. AR400F has a minimum Brinnel hardness of 360. 308? I have shot my 3/8" LV target at 100 with . Therefore, AR400 will have a lower. Specific steel grades (AR400 / AR450 / AR500) in various sizes are available for mining, cement, aggregate and related applications. AR500 steel plate is a high-carbon steel alloy and has a surface hardness of 477-534 Brinell Hardness. The spall angle range for the AR400 vs. Hammer Pins & Tie Bolts; Manganese Separator Drums; Shredder Wear Parts; Wear Pipe. AR450 and AR600 steel plates are also available, but they’re a bit less common. Ar400 is common, the 500 isn' as easy to find without a special order in my exsperience. ALLOY STEELS – Added alloying elements into the steel such as nickel. I have a customer who is wanting me to drill and tap some 1/2-13 holes in some AR 400. Nominal brinell hardness ratings for your typical targets steels are as follows: Mild Steel (A36) - 135 T1/A514 - 235 AR400 - 400 AR500 - 500While their heat treatment process is not regulated, AR400 and AR500 are typically quenched and tempered. 308 I have rocked it at 25 yards with . Amerikaanse standaard: ONS A128What is abrasion resistant steel plate?Abrasion resistant (AR) steel plate is a high-carbon alloy steel plate. Level III (Rifle Rated Steel) Body ArmorOur steel alloy AR500 Armor® Heritage Plate offers the most protection for your buck, and covers the most common threats one could encounter, including nearly all Military & NATO calibers up to the threat level below:. Another key differentiator is applications. When we buy the AR400 3/8 the steel company cuts the one edge with a torch and it's rough as a cob. 3/4″ to 4″ Widths. This costs more but you get targets with crisp clean cut edges and a nicer appearance as a result. Subgroups- low/mild carbon steel (up to 0. Some 3/8″ thick AR500 steel targets are rated for . A high-quality target is only one part of the equation: Using it properly is the other. Context 2. . A633 is high-strength low alloy structural steel. BTDT. Quality steel. pdmedley Private. Brinell vs Rockwell C. A285 Steel Plate. This material is an Abrasion Resistant, Thru-Hardened, Alloy Wear Plate. Plasma doesn't care how hard (or soft) the metal is. AR500 | AR500F Steel Plate. Unlike paper or other single-use marks, AR500 steel shooting targets won’t shatter or spread debris, which makes cleaning up fast and. Carbon Equivalency (47) 1/8″ to 1″ Thicknesses. A633 Steel Plate. Weight difference is basically a wash. The spall angle range for the AR500 vs. In addition to the heat-treating process, AR500 is vacuum degassed and ladle desulphurized. SSAB Abrasion Resistant Commercial Steels are designed to maximize abrasion resistance while providing good formability and weldability. AR500 steel can withstand the abrasion that the rocks cause by sliding better than the AR400 steel, meaning it would last longer. ABS Grade A, B, AH36, DH36, EH36; API 2H Grade 50;. A992 Grade Structural Corrosion-Resistant Steel. AR400 hardness: 360 minimum / 400 nominal. Your targets will arrive clean and rust free with. If plasma, it'll be worse than if flame cut, but either one will be really tough on the cutters. AR400 steel vs T1. The spall angle range for the AR500 vs. One common grade of abrasion resistant steel is AR400. All our AR400, AR450 and AR500 have additional alloying elements which increase formability and enhance weldability. Used in shooting range targets, armor plating, and quarry machinery, this material is ready to provide your projects with toughness and durability. Mirro-Krome 60® (I. You can find hardness levels for AR400, AR450, and AR500 on their respective pages. Abrasion Resistant steel is one of our most popular products at IBC Metal Group. 1-800-745-3962 [email protected]The durability of AR500 also means that the material needs to be replaced less often than materials that have lower resistance to abrasion, which can lower material costs and prevent devastating equipment failures. Independently tested and rated to NIJ 0101. We had two machines down because we ran out of material. AR500, or AR500F steel, is a high-carbon. You still need the AR400 for the yield strength. While AR450 steel is similar to AR400 and AR500, there are some variances that make each unique. HARDOX® is easy to repair and maintain, saving time and money in repairs, maintenance, and downtime for applications. 4140 steel welding, 4140 steel machining, 4150 steel properties, 316 stainless properties, ar400 properties, ar500 properties. Abrasion-resistant (AR) steel plate is a high-carbon alloy steel plate, which signifies that AR is formable and weather-resistant due to the added alloys, and harder due to the addition of carbon. Call or email us now for a free quote!. The AR400, on the other hand. Uses for this plate include material handling equipment for mining. AR steel tends to come in between 235-550BHN. Aplicaciones. Grump Gunny Sergeant. values of hardness are compiled and shown in Table 2. The maximum AR400 / 400F; AR450 / 450F; AR500 / 500F; AR600; Offshore And Marine Steel Plate. What's the differences between MIL-A-46100 armor vs AR500? ANSWER: First of all, MIL-A-46100 is a military grade, whereas AR500 is an Abrasion Resistant grade. 96” and lengths up to 629. AR400 steel is a high-carbon alloy designed explicitly for abrasion and wear resistance. I tested 1/2 AR400 vs a 300 ultra with 150's and 180's at 100 yds. 54 with. 1/2” thick is the way to go for rifle targets for sure. Hold a magnet up to an LS Industries blast cabinet. 화학 성분 상담 및 무료 샘플을 원하시면 저희 공장에 문의하십시오. I like Hardox brand for forming reasons. . Also, while Ar500 has high abrasion resistance, Ar400 possesses more impact resistance. 338 Lapua and 200-1300yds. AR500 Steel. 내마모강은 균일한 경도 (hardness)를 유지하도록 처리되어 S45C 열처리 강판과 비교할 때. So back to the question, “Can I use m855 ammo on my AR500 targets”? The answer is of course you can use any ammo you wish on your ar500 targets. 460-544 BHN Typically. Phone: 800. Key Differences between AR400, AR450, and AR500 While all 3 grades of erosion-resistant steel are designed to offer high resistance to wear and tear, there are some key variations among them. It has a Brinell hardness range of 360-440BHN. Ar300 Steel Plate Equivalent is. ) Wear Pipe; Rhino-Klad™ Clad Plate – Chromium Carbide Overlay; Workwear™ 14 (11-14% Manganese) Wear Plate & Wear Bar;Drilling and Taping AR 400. A preheat and interpass temperature of 250°F to 350°F is generally sufficient, (350°F to 450°F for 500BHN Plate). Here are a few of the main things to consider: ar500 is a more robust grade of steel than ar400. ”. e. BHN signifies the hardness level of the material: AR400:. Steel body armor is typically worn by. The plates are spec'd to be 470 - 550 Brinell hardness. Hardox ® 600 for superior wear resistance. What is the difference between AR200 and AR400? AR200 and AR400 are both Abrasion Resistant steel plates. BALLISTIC STEEL. Aesteiron Steels LLP, is an AR300 plate suppliers, it is available in various sizes and specification. MIL-A 46100 (latest rev. 2″ -> 1. Difficult to form: The greater the carbon content of the steel, the less it will bend to shape. The steel used for shooting targets is usually made of AR500 or AR550 steel. 360 to 440 BHN Typically; 430 to 480 BHN Typically. 9mm FMJ was 7. AR500 Steel vs Titanium. AR600 AR500 and AR400 steel is significantly louder when shot than other steel targets even when pistol shooting because it is harder and it resonates better. They are time savers, especially for larger size holes. Referring to the hardness properties, AR500 recorded the highest hardness at 47. Recommended for riveted, bolted, or welded structures, such as Gussets and Bridge Plates, when intended for construction of bridges. I'm actually wondering if I can use a carbide roto-broach but I'm not sure it will. Anyone that wants to watch some physics in action should look at the BB 2020 fights on Youtube or Discovery+. A few minutes spent on the sander or grinder will pay good dividends in cutter life. They will take a beating for years!AR400 steel is known for its exceptional mechanical properties, particularly its high tensile strength and hardness. A633 is high-strength low alloy structural steel. Clifton Steel is the leading supplier of AR400, AR500, A514, Manganese Steel, and Armor Plate. . The mfg of the plate y o have would be the best place to start. 25 Dia. I have drilled AR400 before but never taped it. What is the difference between AR400 and AR500 steel? Abrasion resistant steels are classified by their typical Brinell Hardness Number. I like Hardox brand for forming reasons. View in full-text. AR500. Details. Its resistance to wear is astonishing, as it resists heavy wear, slide wear, and rub wear. They only contain small amounts of elements other than carbon and iron. 9mm FMJ was 5. AR500 and AR600 will last longer and need to be replaced less often for projects that actually beat up the material. AR500 – Understanding Abrasion Resistant Steel. Featuring a completely adjustable cummerbund, comfortable padding. Now people are making spinning weapons like the type shown in the photo out of AR400 and AR500. This is how we measure the total thickness of a finished Clif-Clad plate, with an overall tolerance of + or – 1/16 of an inch. Available flaw detection requirements: Z15-Z35 thickness direction performance. the 400 in AR400) usually refers to the material hardness based on the Brinell Hardness scale. 223/5. A bunch of 1-1/8" holes. . AR600: 570-625 BHN Typically (less common, but available) What is AR400 VS. Here's the breakdown. 9mm FMJ was 5. The number in the material name (e. 3. and availability out of sight, I don't necessarially agree that 304SS is the answer. Re: ar400 steel I ordered (locally) two cut pieces of AR500 24x30x1/2" with two 9/16" holes, small radius rounded corners. AR400 | AR400F Steel Plate. Hard to say on wear, as our opperators can burn off a set of ski's off of a Cat 6040 bucket in 3 months that are 4 inch thick 12 inch wide that are hardox or AR500 grade. The subsequent grade would be an alloy called 4340. AR steel tends to come in between 235-550BHN. 1045 Steel Round Bars; 4150 Steel Bar; Tensaweld Welding. I plan on using 1/4 Ar500 plate but am unsure of the process needed to weld this type of steel. We rate all of our 3/8″ targets for rifles such as 5. It is commonly used in the construction of bridges and buildings. Eventually, the customers and their team will be the best judge of which material is required for their project. Chromium increases corrosion resistance and hardenability, wear resistance and. Alloy Steels. AR500, or AR500F steel, is a high-carbon. * Glancing impact shots - handgun rounds In three (3) out of six (6) shots [3 center shots, 3 glancing] with 9mm FMJ ammunition against the cylindrical samples there was no spall in front of the samples. Our Wearalloy 500 products are used in a wide variety of applications, and our team is readily available to help provide a proven solution to your specific wear problem. BTDT. Hardox® 450 is an abrasion-resistant brand with a hardness of 450 bhn. 1/2" AR500 will handle high velocity boattail . Price difference is within a couple bucks between the two (AR500 being a few dollars more). Ground penetration won't be that much of a problem, and you still have to protect the entire shin face of the shank. Owen joins me again this episode to try to poke some holes in a 5/16" plate of AR400 steel. SKU. AR500 -A quenched & tempered, through-hardened, abrasion-resistant grade of steel plate. This curved armor plate has our durable FragLock™ coating and is especially mobile at just 5. – is too soft and can yield unpredictable results. I was shooting LC match ammo that is loded with a 175g SMK. Debido a las ventajas únicas del AR400, se utiliza en aplicaciones tales como la maquinaria pesada y aplicaciones de placas de acero. 56 are made of AR550 steel and 3/8″ or 1/2″ thick. With an extra 50 HBW hardness over AR 400 grades, it provides additional wear resistance for an extended service life. AR400. September 07, 2021 Tags: Educational AR400 vs. AR500 Steel Plate. General Info About AR450 / AR450F. Both 8" AR400. 4. In three (3) out of six (6) shots [3 center shots,. Also if your plate swings around on impact, watch out for unpredictable splashback. Whereas 400 can be between 360 and 440 Brinell, 500 is between 477 and 550. ASTM A830-1045; C1020; Alloy Quenched & Tempered (Q&T) Steel Plate. Hardness testing AR500 steel plate. AR Plate (trade names such as:"Algoma 500 , AR500, Hardox, etc. In the same manner AR400 could be used as Ar500 Steels Equivalent as well. They have shown preference for 304SS construction w/AR400 floor. AR400 vs AR500 steel plates are two of the most popular abrasion resistant steel plates in the world. In the case of AR400 steel plate, 400 is the plate’s nominal hardness, and it has a hardness range of 360 to 440. This is a little girls load compared to most of the things guys are shooting in here. WINCO-TUF 50 is the cost-effective choice for parts subjected to extremely high levels of wear. It is a common material for conveyors, chutes, linings, hoppers and handling equipment in the materials handling and mining industries. While AR400 offers a good balance of hardness and toughness, AR500 provides enhanced hardness and penetration resistance. Hardox ® 600 has been successfully used in cement. Plates measure on average 40 RHC. As such, they provide even more protection against rifle fire and handgun rounds than ar500 plates as well as superior shock absorbency. 3-0. Custom applications can use an A-514 steel or other higher strength steel in replace of a mild steel base plate. Haven't been able to shoot it yet. Available SizesAR400 / 400F; AR450 / 450F; AR500 / 500F; AR600; Heavy Steel Plate. Hardox ® 450 has a solid reputation as a highly versatile, abrasion-resistant steel that also has structural properties. It has more hardness than the AR400 steel plate with good formability, good weldability, good ductility, good strength, and good impact resistance. AR400, or AR400F steel, is a high-carbon. For that condition, AR500's higher hardness makes a huge difference. AR400 | AR400F Steel Plate. My AR500 plate came with instructions to keep impact velocity BELOW 3200 fps. A285 is a carbon steel intended for. The AR plate you’re cutting should be 3/8″ or 1/2″. Foreign vs. In construction and fabrication, the grade and composition of the steel plate materials used make a huge impact on the final product. A quick google search brought up about 4 different "welding AR500 steel" threads on snipershide along with alot of info from the fab webpages. Each grade has a different BHN, or its ability to handle intense abrasion. We would like to show you a description here but the site won’t allow us. What Do The Numbers Mean in AR400 vs AR500? With abrasion resistant steel you’ve probably noticed there is usually a number after the AR, such as AR200, AR400, AR450, AR500. 56/. Steel body armor is a type of body armor plate that is made from high-quality tempered steel such as AR500 or AR550 steel. The key alloying elements in AR400 are used for specific purposes. Norm right from Lincoln. 158K subscribers in the longrange community. Galion uses only premium ASTM certified AR450. 22 up to . Preheat to 150°F-300°F (66°C-149°C) in order to slow the cooling rate. Explore What We Offer What We Offer Who We Are Calculators Contact. AR450: 430-480 BHN Typically.