machining ar400. The software takes the guess work and the headache out of feed, speed, step over, and step down to ensure it’s going to work the first time. machining ar400

 
 The software takes the guess work and the headache out of feed, speed, step over, and step down to ensure it’s going to work the first timemachining ar400 Description: Jergens Ball Lock® Standard Subplates are equipped with (4) 20mm Ball Lock® Face Mount Receiver Bushings for use with 14" x 14" (350mm x 350mm) or 16"x16" ( 400 mm x 400 mm) fixture plates

The "AR" in AR400 Steel stands for "Abrasion Resistant". What is this grade steel used for? It is used where high wear resistance is. sfm 200, . APPLICATIONS AR400 plate are used in applications where abrasive materials such as grains, coal, ore, cement, gravel, light aggregate, and earth are being handled. AR400 Steel Plate – Tensalloy AR400. This material is characterized by a smooth, dark scale finish with a hardened surface. 9300. ASTM A516/ ASME SA516; ASTM A537/ ASME SA537; ASTM A283/ ASME SA283; ASTM A285/ ASME SA285; Armor & Ballistic. You can find hardness levels for AR400, AR450, and AR500 on their respective pages. It’s also good in its formability, and in fact, the low levels of sulfur and carbon lead to better shape control. I have some 5/8" solid carbide endmills that i would like to try a trochodial tool path with, basically just for practice and to test this kind of tool path. Steel Warehouse supplies AR400 steel plate, sheet, and coil, specifically designed for abrasion and wear-resistant applications. 96” x 360”. AR250 steel plates are made for improved formability with low levels of carbon and sulphur for inclusion shape control. You can find hardness levels for AR400, AR450, and AR500 on their respective pages. Apr 19, 2023. AR450 is not recommended for machining, but is formable. Forming can be done in cold forming conditions. It features good abrasion resistance and is. From small 28" thumbs, to large 50" multiple tines thumbs, or custom request. Differentiators include hardness levels, application uses, and cost. AR400 Steel Mechanical Properties. Alloy Steels. It has fair to good machinability. Thick AR400 plates are harder, and more force is required when cutting. A bunch of 1-1/8" holes. The A36 steel plate specification, on the other hand, does not cover multiple grades. AR400, or AR400F steel, is a high-carbon. AR400 plate is resistant to corrosion from atmospheric conditions and protects well against impact I usually work with 1" and above, and use mist. 9300. Amarillo. AR400 Steel Mechanical Properties. The weathering polyesters in this collection are designed for high quality exterior grade pigments and superior outdoor weathering properties, while meeting AAMA's 2604 standards. AR500, or AR500F steel, is a high-carbon. General Info About A656. replacement product that is ready for immediate installation to minimize downtime and increase productivity. 4140 steel is a low alloy steel plate. Context 2. Abrasion resistant & incredibly durable. In addition to its general characteristics of being formable, while maintaining good abrasion resistance, AR400 steel also has the following. Manganese steel is a steel alloy containing 11-14% manganese. Wearalloy 400 and 450 can be cold formed in a press brake or rolls. Min Order: 1 ton. The biggest problem with drilling is that you need to apply quite a bit of feed pressure. See full list on associatedsteel. AR400. BONUS: Shoot better. Menu. High productivity & Low cost. AR400 Flat Bars; ASTM A514; ASTM A829 AISI 4130/AISI 4140; Marine & Offshore Steel Plate. 080") 6082 - this is the finished size, and has pockets 1mm (. Both 3 and 4-axis machines are available. AR500 hardness in Brinell: 450 minimum / 500 nominal. Greater ductility makes it a good choice for interrupted cuts. What is the best material to use in manufacturing wood grinder screens? The answer depends on the size of your wood grinder and the material you run through it. AR400 Steel Uses. ASC2250® LDX vs 300 Series vs 400 Series Stainless;Hello Unregistered PLEASE NOTE: Recently Renovete Forum closed down. This material is characterized by a smooth, blue-grey-red finish with a hardened surface and while not a good candidate for forming and machining AR200 plate is suitable for welding. 150” Speed 260 brazed, 330 throw-away Feed . The AR400 steel plate is often used in applications where abrasion-resistant, formability, and weldability are required. AR400 steel is designed for abrasion and wear-resistant applications. That shouldn’t stop you from exploring newer grades of Hardox ® steel. 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. Mar 13, 2023 / Welding 1/4in AR400 to Mild steel #5. It is suited to handle many applications including: transfer rails, conveyor guide rails, machine ways, beef rails. Hardox® is hard through and through, from the surface deep down to its core, giving you extended service life and high productivity in the most challenging environments. Another difference is that AR400 can be machined whereas AR450 is not recommended for machining. 9300. This materials is an Abrasion Resistant, Thru-Hardened, Alloy product. AR400 is a high-carbon alloy steel with high wear resistance, good formability. ASC2250® LDX vs 300 Series vs 400 Series Stainless;AR400 plate - Blacksmithing, General Discussion - I Forge IronVM8T6KywXdWB. It's near the upper limit of machinability with HSS tooling, and even coated carbide has a shortened life span. DIN17100 RSt372 steel plates have extensive application in construction of. T. AR400, or AR400F steel, is a high-carbon. Great attendance and a positive attitude. the 400 in AR400) usually refers to the material hardness based on the Brinell Hardness scale. CF Metals premium grade of these products are 360 and 400. My CNCzone Login. A514/T-1 plate is available in eight. AR400, or AR400F steel, is a high-carbon. Whereas 400 can be between 360 and 440 Brinell, 500 is between 477 and 550. When one end wears out, turn the tool around for a sharp edge. We drill AR400 with cobalt bits very, very slowly. The resistance in heat and hardness allows the tool to run about 20-30% higher machining speeds than uncoated end mills. Generally, when talking about conventional vs climb milling, people often assume that climb milling is better because it has minimal load, offers a better surface finish, and ensures that the tool lasts for a long time. Once the plate is rounded, it will crack. D. Feed Control (Milling) – Customize how the Feeds and Speeds Calculator fine-tunes the Chip Load and Table Feed. AR400 Steel Uses. I often work with AR500 and 46100E (hence the name hardplates). Hankev is an industry leader in depth, breadth, and availability, serving over 1000 customers worldwide. Referring to the hardness properties, AR500 recorded the highest hardness at 47. Our tines will hold up too many years of wear and tear. Uncoated C23 & C23J 123 156 310 323 & 323F 356 Aluminum 2024, 6061, 7075 etc. 005-. The second reason for the cracking of AR400 wear resistant steel plate is to check whether it is re refined after waste recycling. Details. For the thicknesses given, the AR400 should have a minimum preheat of 250 degrees F and the A514 a minimum of 125 degrees F. Hardox® 450 combines good bendability and weldability with an possibility for assured impact toughness (Hardox® 450 Tuf). Use this steel bolt-together framing to build guards, tables, and racks. Paid Time Off. The Brinell Hardness number differentiates the abrasion resistant steel grades. 75" can be cold bent to minimum inside bend radius of 3t (where t is the plate. This plate product is intended for use in applications where a good balance of formability, weldability,. 50. High quality AR500 wear resistant steel plate AR500 hot roll sheet 3/8 4x8 pricing $600. It looks like metal slats sticking out, and they are skip welded with (probably 7018). Drilling, countersinking, counterboring, tapping, milling, and general machining can be done with conventional equipment and carbide tools. Typical hardness range is 385/425 BHN. Abrasion resistant steel is created by quenching and tempering forged steel plates. If you’re in the firm and durable steel market, it’s hard to go wrong with AR400 steel. Ar400 Wear Plate is designed with a minimum tensile strength of 1318mpa with a minimum yield strength of 1187mpa. Because of this material’s high yield strength it is ideal for projects requiring a light weight steel without sacrificing durability or toughness. I have a customer who is wanting me to drill and tap some 1/2-13 holes in some AR 400. Flowcut is saying with our set up a pierce of just over 5 seconds. OK, guys, thanks for your replies, this drill did have a double tip like nothing that I have seen before, and I have drilled over 1800 holes in . Stay updated with our newsletter!The steel is inside Earth's magnetic field. Removal of the chrome plate and the induction hardened layer will necessitate the use of somewhat unique tooling. I drilled a 1/4" pilot, and then drilled to 1-1/8" with a 118 deg 1/2" shank S&D bit. Heat Treatment. e. AR500F. This material is characterized by a smooth, dark scale finish with a hardened surface. Mir50® Machining Guidelines; Close; ASC2250® LDX. Log in. The resistance in heat and hardness allows the tool to run about 20-30% higher machining speeds than uncoated end mills. However, steels of this hardness cannot be fabricated as readily as conventional structural grades. Bending the sheet metal longitudinally (with the grain) allows those grains to separate at the grain boundaries. TENSALLOYTM AR400 TENSALLOYTM AR450 TENSALLOYTM BLUE AR500. 080") 6082 - this is the finished size, and has pockets 1mm (. Simply put, machining coolants are at the heart of any machine shop and they’re just as important to the work as the hardware and raw materials. I'm using an older Hurco KMB-1 that's in. sfm 200, . AR400, or AR400F steel, is a high-carbon. sfm 200, . One of two abrasion-resistant grade steels offered here at SendCutSend, AR400 steel is formulated to take a massive amount of punishment and. New and popular video trendsI have a Gerber Advantage 400 also known as the AR400. ContinuedHowever, this grade steel is not recommended for machining. Up to . 3. hi there, I'm new to cnc, and was thinking of making a machine (checking out all the useful info on this forum), but then a small job came up that meant it would be useful to get one straight away, so I bought a Gerber AR400 off ebay (4x4 foot bed). Drilling, countersinking, counterboring, tapping, milling, and general machining can be done with conventional equipment and carbide tools. Hardox is a wear resistant steel; Also, the combination of hardness and toughness made this steel the best choice when looking for both properties. AR400 Steel Plate AR400 Steel Plate – Hardness 360-444 Brinell. Grade 304 stainless steel is weak compared. , Ltd. Set the amperage to 65 or 85 keeping the speed to 45 or 25 inches per minute respectively. New and popular video trendsShandong Rizhaoxin Metal Products Co. 010" and take the depth in 2 separate wacks. The Ar400 Plate is not a good candidate for machining due to high hardness, however it has a high weldability. Readily cold formed. However, AR400 or AR400F has better weldability than AR450 or AR450F. With its 600 BHN I. Conventional milling is preferred for rough surfaces. need a little help feeds/speeds in ar400. 787” 3t (use 13. We produce and export GB/T 24186 NM450 Abrasion resistant steel plate,GB/T 24186 NM450 Wear resistant steel plate, GB/T 24186 NM 450 Cutting steel plate, NM 450 machined parts. AR steels are a great choice to build a gate, valve or diverter if you deal with high. WINCO-TUF 50 is the cost-effective choice for parts subjected to extremely high levels of wear. While grade 304 stainless steel is fine for most other applications, type 304 stainless steel is cheaper and easier to fabricate. Machining. Locate and compare Machine Shops in Victoria BC, Yellow Pages Local Listings. Compared to AR400, the AR450 steel plate offers more hardness without sacrificing formability and ductility. At sharper bends, wear plate forming should be performed with the axis of. While grade 304 stainless steel is fine for most other applications, type 304 stainless steel is cheaper and easier to fabricate. ASTM A514. Milling. Materials with higher BHNs have greater levels of hardness, while materials with lower BHNs have lower levels of hardness: AR400: 360-440 BHN Typically AR450: 430-480 BHN Typically Hardox® wear plate for extreme abrasion resistance. Debido a las ventajas únicas del AR400, se utiliza en aplicaciones tales como la maquinaria pesada y aplicaciones de placas de acero. Furthermore, there are two main types of milling operations; face milling and slab milling. It has good machinability. Algoma recommends the followingGrain direction also plays into the amount of springback you can expect. 2200 RPM @ 25 ipm. MACHINING. One of our most popular products is stainless angles. Check out for the best AR500 steel targets. Targeted search for over 3,800 companies ; Search among 500,000 products2100-4000ft-lbs = ½” AR500. Satisfactory machining and welding characteristics. MACHINING Drilling, countersinking, counterboring, tapping, milling, and general machining is performed. Ar400 Wear Plate is designed with a minimum tensile strength of 1318mpa with a minimum yield strength of 1187mpa. It is a high strength micro-alloyed, free machining carbon steel with a typical hardness of 260 BHN and typical tensile strength of 133,000 PSI. 00When it comes to high-quality alloy steel products, Ameralloy Steel Corporation is a leader in the industry. Up to . Alloy Steels. #1. Valast® 450 :125” - . . 26 0. 4-1%, the machinability rate gradually decreases. Even in operations that use dry machining versus wet machining, you’ll want to have at least some coolant on hand. These are for some sawdust buckets. Truck bed and bucket liners are major applications, as well as chutes and gates. The most straightforward answer is that Rockwell hardness refers to how resistant a metal object such as a knife blade is to penetration and permanent deformation from another material. A36 Steel is the American Society for Testing and Materials (ASTM) designation for carbon steel with a yield strength of 36,000 PSI. Description: Jergens Ball Lock® Standard Subplates are equipped with (4) 20mm Ball Lock® Face Mount Receiver Bushings for use with 14" x 14" (350mm x 350mm) or 16"x16" ( 400 mm x 400 mm) fixture plates. been asked many times if it's possible for someone to drill a hole in their AR500 steel targets and I've always had to. 045 7100 ultra filler Root pass looks good though I would shareMuch like AR450 and AR400, AR500 steel is a specific type of abrasion resistant steel with a surface hardness of 477-534 BHN. The typical Brinell Hardness range is 360-444 BHN. Resources. Xometry offers instant quotes on metal laser. Low CEV offers easy bending, welding and machining. Details. 50Forum - The expert community . 321. machining 96 inch long ar400 steel wear strips. We stock AR400 Wear Bars & Strips in standard sizes from 1/8 thick up to 1 thick. Welding AR400 PlateAR400 Steel Machining and Welding. , Ltd. Dec 2007. Taig Mills. It’s also good in its formability, and in fact, the low levels of sulfur and carbon lead to better shape control. AR400 can be used as a basic component or as a liner in all types of material handling equipment. Request a Quote. Milling is a machining process that involves the use of rotating cutters to remove material from a workpiece. Length: 15. It has a solid reputation as a highly versatile, abrasion-resistant steel that also has structural properties. With work envelopes ranging from X- 26 in, Y-16. Feb 6, 2019 #9 You don’t need ar400 for a wedge, a36. Drilling holes in Hardox and other similar wear plates is a specialist task and requires the right equipment and setup. AISI 4340 alloy steel is a heat treatable and low alloy steel containing chromium, nickel and molybdenum. Have a look at our machinability rating graph which without a doubt will make your decision a lot easier with its incredibly detailed information. AR400 Flat Bars. Mirro-Krome 60® (I. Simply put, machining coolants are at the heart of any machine shop and they’re just as important to the work as the hardware and raw materials. 015 inch/revolution Tooling C6 (Cutting Fluid: Soluble. This specialized plate is designed for severe impact and abrasion applications. 5 inch (63. We have AR400 and AR500 angle in stock!NOTE: Varying conditions can easily require adjustments. greenworks trimmer part no 341131453. ASTM A516/ ASME SA516; ASTM A537/ ASME SA537; ASTM A283/ ASME SA283; ASTM A285/ ASME SA285; Armor & Ballistic. The AR400 steel plate is often used in applications where abrasion-resistant, formability, and weldability are required. Apex EZ Sander 37" Single Head Wide Belt Sander, EZ3760MInv. Due to these properties, A514 is typically used in applications where wear resistance and the ability to withstand high impact are important. Carbide does not like excessive pressure. With better heat and wear resistance than high-speed steel, these cobalt steel end mills can run at higher speeds and provide better performance on hard material, such as iron, hardened steel, titanium, and tool steel. Category overview ; List of all discussion forums ; The 100 latest forum topics ; IndustryArena. Kinda what I was thinkin. The typical Brinell Hardness range is 360-444 BHN. Finally, once you’ve reached the desired depth, remove the drill bit and clean up any debris. It has good weldability. The ability to multi-task and work under pressure. AR400: This steel provides a high degree of hardness and strength because of its quenched and tempered chrome-moly, boron treatment. This plate product is intended for use in applications where a good balance of formability, weldability,. Winco-Tuf 40 is for use in areas where AR400/AR500 are currently used. Hardox ® 450 has been state-of-the-art in wear steel for a long time, and it will stick around. CITIZEN Machines; Colchester Tornado lathes; CNC "do-it-yourself". Excellent resistance to both impact and sliding abrasion at a moderate cost. With AR500 you need carbide and clamped solid. Stocking over 50,000 Shapes, Sizes, Types and Lengths of Steel, Aluminum, Stainless, Brass, Copper, Cold Finish Steel, Tool Steel and Alloy Steels among our network of warehouses, at Wholesale Prices. Altech Machining is a machine shop serving Victoria, BC since 1992. A588 welds similar to low carbon steels like ASTM A36 and ASTM A572. Mechanical Properties:AR400 Flat Bars; ASTM A514; ASTM A829 AISI 4130/AISI 4140; Marine & Offshore Steel Plate. i have always found that if you pre heat and let it cool naturally and then drill it takes all the trouble out of the machining process. While not a good candidate for forming and machining, AR400 plate is. 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. 1-800-745-3962 1-800-745-3962 [email protected] ShippingProperties The high-carbon composition and additional chemical alloys included in AR500 steel give the material enhanced hardness and wear resistance. 080") 6082 - this is the finished size, and has pockets 1mm (. The versatile plates have outstanding mechanical properties that are constant across different conditions. 33), this is a killed steel that provides the best combination of strength, weldability, and structural soundness. In addition these grades are quenched / tempered and are also certified to MIL-S-16216. What is the best material to use in manufacturing wood grinder screens?The coating offers high surface lubricity, reduces friction, and increases chip flow. This material characterized by a smooth, dark scale finish with a hardened surface. Preheat to 150°F-300°F (66°C-149°C) in order to slow the cooling rate. Hardness Conversion Chart**. E. Go. Maximum SFM . Classifications for abrasion resistant steels correspond to their typical Brinell Hardness Number. Liberal amounts of a good coolant are essential. 16:14. steel. CNC machining services with screw machine capacity from 1/8 in. Hardox® wear plate for extreme abrasion resistance. Plates thicker that (1) punch diameter will not punch well, also, so the rule of thumb depends on plate thickness in some degree with drilling required based on plate thickness. Forum - The expert community . You have the below options to control how the chip load is calculated. 010+ FPR Maximum SFM . 5 mm) thick plate, and at least 110 ksi (758. Generally speaking, these problems can be. AR500 | AR500F Steel Plate. AR360 / AR400. 00 - $1,100. While some of this is a bit on the nose, there are other considerations you should. As with other abrasion resistant steels, it does not have a defined chemistry, but rather, grade is determined based on. 따라서 바위, 모래, 석탄, 광물의 적재시 주는 충격이나 미끄러지면서 가해지는. While all of these grades have slightly different chemical properties, the mechanical properties remain the same for all. Many fabricators only use A36 Steel, which will wear down quickly. CNC Machining; 2 3. Turning and Cut-off – Speed 70 fpm Feed . drilling and machining fun. Kromite® #3 (4140/4150 mod. I have a piece I need to machine and the customer told me it is AR 400. Machinability can help us to determine whether a type of material is suitable for CNC machining services. Directions. You can also find other Repair Shops & Related Services Nec on. Contract manufacturing, CNC machining, turning, milling, drilling, fitting, and assembly are examples of the company’s secondary services. Sounds like you're going to do this on an ongoing basis, and if so, you oughta think about getting yourself a radial drill. Learn More . Multiple Machining Capabilities; Drill Stem Repairs and Manufacture; New Stock Plate in Mild Steel, AR400, Nickel Chrome and Chromium Clad Overlay; AREAS OF WORK. 401(k) + company match. 4000-10000ft-lbs = ⅝” AR500. We also have a variety of additional cutting and metalworking equipment capabilities in house to provide additional value to our customers. You can find hardness levels for AR400, AR450, and AR500 on their respective pages. 5" wide x 20" long 1" thick AR-400 plates that need a centered slot cut completely through them 3. Oxy-fuel cutting, metal, cold. The Ar400 Steel Plate offers a good bending capability and shows enhanced resistance to impact abrasion. 040") deep, see the attached screen shot showing completed part. com. in Saugerties, NY, is a steel fabrication service provider that works with a variety of metals, including aluminum, stainless steel, and structural steel. May not sound much but the effect on wear life is impressive. High-speed machining refers to high feed rates and spindle speed for removing material without compromising part quality and precision. Each of these grades have slightly different chemical compositions and mechanical properties. A quenched & tempered, through-hardened, abrasion-resistant grade of steel plate. The nickel and molybdenum content gives AR400 carbon steel the ability to resist wear better than all other carbon steel. 0625" wide by half inch deep. 75 inch. AR400 Steel Plate – Tensalloy AR400 Armor Plate . Next I experimented with the cheapest way to drill and machine the stuff. Minimum yield strength of 100,000 psi. AR400 (aka Hardox 400) is a high hardness, high strength, quenched and tempered, chrome-moly, boron treated alloy plate. Why is Hydrogen a Concern in Welding? Welding Precautions for T-1 Steels. 500 end mill kc633m gradeRhino-Tuf® EZ (AR400) Wear Plate; Rhino-Tuf® EZ (AR400) Wear Bars; Redi-Rail® (Formerly Kromite® CD60) Custom Wear Rail;. Educational. [Shandong,China] Business Type:Manufacturer , Trade Company. Drilling can be done with any high-speed drill. First it causes a reheat and improper heat treatment of heat treated steel. Since our founding in 1948, Alro has been focused on exceeding our customers' expectations. 4. AR500 Targets. Even in operations that use dry machining versus wet machining, you’ll want to have at least some coolant on hand. Machining. Posts. TV . Find useful information, the address and the phone number of the local business you are. AR500, or AR500F steel, is a high-carbon. Applications include truck & trailer frames, heavy construction equipment, and crane booms. Titanium Carbo-Nitride (TiCN) has a higher surface hardness versus that of Titanium Nitride (TiN). AR400 is a type of steel plate. I'm using 250 preheat . 321. Mild Steel Plate Black AR400 is a flat shaped plate of AR400 Black Mild Steel. Axalta is offering a five-year warranty. TV . Xometry offers instant quotes on metal laser. The hardened condition is used where added strength or resistance to wear is desired. Our innovative approach means you get the benefit of state-of-the-art technology coupled with personal. The material is very resistant to abrasion and will achieve up to three times its surface hardness during conditions of impact, without any increase in brittleness which is usually associated with hardness. The lead additive acts as a lubricant, which allows 12L14 carbon steel to withstand very fast machining. 007 inch/revolution. Machine manufacturers may recommend tapping, broaching, drilling, milling, turning, or sawing using suitable tool types, feeds, and speeds to machine 1045. Replies 25 Views 1K. Abrasion and Wear Resistant Steels offer enhanced wear resistance properties to improve the performance and longevity of your equipment. The maximumA high surface hardness from your coating is one of the best ways to increase tool life. AR400 Steel Physical Properties. 040") deep, see the attached screen shot showing completed part. 080") 6082 - this is the finished size, and has pockets 1mm (. Second choice is some AR400 already hardened, but it is . Anyone familiar with machining AR500? I'm looking to make some small parts that need to be hard and see McMaster Carr has AR500 C48 200,000lb yield. You can use carbide tools with conventional equipment to do stuff like general machining, milling, tapping, counterboring, countersinking, and drilling. For example, it will resist fatty acids at high temperatures as well as sulfuric acid. 3% brings the best machinability rate. ) Wear Pipe;. Material: Steel, Other. AR-235 may be fabricated within reasonable limits with respect to machining, forming and welding. Carbide – Depth of Cut . Mir50® Machining Guidelines; Close; ASC2250® LDX. USA Quality Runser Custom Machining Thumb: This thumb is composed of two ¾” thick AR400 steel tines. ) Wear Pipe;. The AR plate you’re cutting should be 3/8″ or 1/2″ thick. 3 and 4-axis precision CNC machining services for castings, weldments, steel, stainless steel, aluminum, brass, bronze, copper, and alloy steels. Hi folks, today I'm attempting to machine up a lid as part of a job we're trying really hard to get. jpg. Our metal laser cutting services support a variety of metal materials, including: Steel, Stainless Steel, Tool Steel, Spring Steel, Aluminum, Brass, Bronze, Copper, and Titanium. ahowudoon I still have a hot rolled steel plate 5/8" thick I am still meaning to countersink for 3/8" flatheads. The AR400 steel is Abrasion Resistant (AR) steel with a Brinell hardness of 400. Meanwhile AR500 / AR500F is not. Learn MoreAll thumbs are made to fold up as close to boom as possible. We have No Minimum Orders, We Cut to Size. and A.