A633 Steel Plate. Just make sure it's actually AR500. 4. AR500 Steel. They are most certainly not bullet. The advantages of this product include reduced waste and minimal lead time compared to the. AR400 is a specialty steel designed at the chemical level for improved wear resistance for very specific applications. AR450 is an abrasion resistant plate used in a variety of. For that condition, AR500's higher hardness makes a huge difference. With the current market upheaval driving prices. Hi, I'm bending a plate of AR400 (20 x4 x3/4 ) 90°, then when the part is in use there is a force on the in the. . This product is designed for applications that demand both wear resistance and impact toughness. Re: AR500 vs AR400 Steel?? AR400 = Holes at less than 300 yards. Quality steel. Hammer Pins & Tie Bolts; Manganese Separator Drums; Shredder Wear Parts; Wear Pipe. Our company can provide cutting, welding, drilling and turning services if required. Consequently, AR400 will have a lower hardness than AR500. That’s an increase in hardness of 30%. 158K subscribers in the longrange community. Great for shooters looking for a deal on handgun targets and rimfire targets. #8. Specific steel grades (AR400 / AR450 / AR500) in various sizes are available for mining, cement, aggregate and related applications. The . 9mm FMJ was 5. AR500. 308? I have shot my 3/8" LV target at 100 with . Grump Gunny Sergeant. AR400F is quenched and tempered through hardened wear resistant grades of abrasion resistant steel plate used for high impact and abrasion resistance. SLS 600 ® Induction Wear Pipe; CLIF-CLAD ® Overlay Pipe; G 2T ® Ceramic Lined Pipe; Steel Round Bars. Contact us now for a no-obligation free quote analysis and to discuss the steel solution that’s right for you. The padding in the shoulder straps gets in the way when trying to shoulder your rifle. . 338 Lapua and 200-1300yds. In this case, Ar500 is preferable in the competition of Ar500 Plate vs. User NameAR400 vs AR500 Guns & Ammo Discussion. and availability out of sight, I don't necessarially agree that 304SS is the answer. They possess unique properties that make them suitable for a. Can You Roll Form AR sheets? Due to the steel’s extreme hardness, AR500 plates are very difficult to form. There are several grades of abrasion resistant steel, including AR200, AR235, AR400, AR450, AR500 and AR600. Other AR steels are AR200, AR400 and AR500. Slight preheat can help but does contribute to the peak temperature achieved during welding. AR400 and AR500 plates are AR plates that are 400 and 500 BHN, respectively. AR450 vs. They also undergo ballistic testing to determine the velocity a weapon. 223 leaves very tiny peening marks. We would like to show you a description here but the site won’t allow us. At 60 yards, many types of 223 ammo will be above 3200 fps. Constructed using a 1/4” AR400 front plate, 1/4” AR400 legs, and 3/8” AR500 6″ targets, this tree is an extremely robust system that maintains a manageable weight for portability and easy storage. The best steel targets for . ”. 308 I have rocked it at 25 yards with . It does seem to weld better. 315”. It has a Brinell hardness range of 360-440BHN. Ground penetration won't be that much of a problem, and you still have to protect the entire shin face of the shank. Details. Based on testing with the various pad configurations, we’ve determined the Militia in its current configuration will fit up to 22-½” circumference. Kloeckner offers A5656 in four different grades, including 50, 60, 70, and 80, and in three chemical requirements, type 3, type 7, and type 8. Disclaimer: I haven't done AR500, just AR400. With an extra 50 HBW hardness over AR 400 grades, it provides additional wear resistance for an extended service life. hardened. Both are alloys with excessive strength and wear resistance. Hardox® 450 is an abrasion-resistant brand with a hardness of 450 bhn. Intended for moderate wear applications, common uses include contact. My question is if it will stand up to . 4140 steel welding, 4140 steel machining, 4150 steel properties, 316 stainless properties, ar400 properties, ar500 properties. High Caliber AR500 Animal Silhouette Targets. Hardox® 400 is available as plate in thicknesses of 0. They’re fairly similar, but the AR500 steel is harder than AR400 (as the designation indicates). While AR450 steel is similar to AR400 and AR500, there are some variances that make each unique. Stocking inventory includes 48″ x 96″ up to 96″ x 288″. User NameAR400 vs AR500 Guns & Ammo Discussion. Preheat to 150°F-300°F (66°C-149°C) in order to slow the cooling rate. One of the main differences between the ar400 and the ar500 is the cost. Request a free quote on steel for industrial wear applications from Clifton Steel. Hit it with a file. 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. The application will determine whether you want an AR400 or AR500 wear-resistant steel plate. Abrasion resistant material is tested by. Menu. boron treatment. AR450 is an abrasion resistant plate used in a variety of. BLUE AR500 requires using low-hydrogen-producing electrodes in welding. 3-0. More Info. Hardox® 450 combines good bendability and weldability with an option for guaranteed impact toughness (Hardox®. Hi guys, I am looking for a drill bit that will drill ar400 steel, I have been using the one pictured, it was in a bunch of tools that I bought in a auction, so do not know where it comes from, and nobody around here sells it. sharpshooter. ) MIL-A 12560. This specific steel has good formability, weldability, and notch toughness when in the as-rolled condition. * Glancing impact shots – handgun rounds. #17. Tacticon Armament’s AR600 10×12 can weigh as little as 6. Hunter can benefit from steel targets as well, and there is no. View in full-text. Differentiators include hardness levels, application uses, and cost. The typical Brinell Hardness range is 470-530. or monthly payments as low as $37. Typical hardness range is 385/425 BHN. e. AR400 is a high-carbon alloy steel commonly used in mining, forestry, and construction. AR400F is quenched and tempered through hardened wear resistant grades of abrasion resistant steel plate used for high impact and abrasion resistance. Most of the time, AR550 is recommended for dynamic rifle targets, or any bullet that carries more than 2100ft-lbs of energy as a ½” or ⅝’ piece of AR500 is going to be extremely heavy and unwieldy. AR400. With its 600 BHN I. Maximize coverage and comfort: The Testudo Gen 2 Plate Carrier provides a tight fit and plenty of space for everything you’ll want in a full tactical loadout. ¼" AR500 ⅜" AR500 ⅜" AR550 ½" AR550 RECOMMENDED AMMUNITION (Type / Load / Max Velocity / Max Energy) Rimfire Pistol Centerfire Handgun Centerfire Rifle Big Bore Rifle. 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. 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. Posted July 18, 2013. AR500 will take hits at close range from . In the case of AR400, the plate’s hardness would equal about 42 Rockwell C (HRC) or approximately 400 on the Brinell Hardness scale, while AR500’s hardness would be around 50 HRC or roughly 500 on the. 16:14. In that time, we have become a well-respected and reliable source for your high strength alloys; such as 4140 CF, 4150 HT, and 4150 HT TGP. The hardness range for this grade is 470 BHN - 540 BHN and, like AR400, it combines through hardness and toughness benefits with superior flame. In fact all of my targets are made from AR400 and have held up with no issues from . Steel Warehouse stocks abrasion resistant steel in plate, sheet, and coil in the following grades: AR200, AR400, AR450, & AR500. 35 votes, 10 comments. 16:14. The 1/4” AR400 works with 38sp, 9mm, 40S&W and similar cartridges. It's tensile strength is between 3-4 times that of a Grade 50 structural steel. AISI 8620 can be used for a range of medium-strength applications. All I had for my mill at the time was a 1/2" chuck. It won. AR500 has a BNH of 470-540 and MIL-A-46100 has a BNH of 362. We use T1 minimum and a lot of our attachments are made from AR400 or are AR 400 tipped. 화학 성분 상담 및 무료 샘플을 원하시면 저희 공장에 문의하십시오. We had two machines down because we ran out of material. Here's the breakdown. Abrasion-resistant steel plate and common steel plate have significant differences, but the differences between AR400, AR450, and AR500 are more subtle. 92”. At my local steel yard I can buy AR 400 (Abrasion Resistant) in 3/8 thickness for $1. 최소 4배~10배의 내마모 수명을 보유한 특수강입니다. Typically, AR400 is between 360-440 Brinell, while AR450 is around 429-495 Brinell, and AR500 between 460-544 Brinell. Random Erik also makes a guest appearance. The end result will be a plate that ranges between 7/16″ and 9/16″ thick, hence 1/2″ nominal thickness. Explanation of Steel Body Armor. 5 mm) thick plate, and at least 110 ksi (758. Source: I have thousands $ spent onar550, ar500 and ar400 steel. [1] Quenching & Tempering Abrasion resistant 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. You could try to drill a hole in one and see how it goes, or if you really want to know, You could check it with a brinell hardness tester. Testudo™ Gen 2 Build Your Own Bundle. The tensile strength of AR400, often referred to as the ultimate strength, has been measured at about 200 kilograms per square inch, far more than. Clifton Steel is the leading supplier of AR400, AR500, A514, Manganese Steel, and Armor Plate. 4140 steel properties. AR500, or AR500F steel,. For AR 500 it is $1. The 1/2-13 holes will be for securing the pins. D. While targeted at more severe wear conditions, Hardox ® 600 can still be cut and welded, making it an excellent choice for high-performance applications. 5 pounds. Additionally, we stock Threaded Rod, 316 Stainless Steel, Duplex Stainless Steel,. While the AR400 steel may seem similar to T1 steel, they’re actually quite different. 308 and . Foreign vs. AR400, or AR400F steel, is a high-carbon. This has a surface hardness of 477-534 BHN. Details. Picked up a pack of AR500 3/8" thick targets from Field & Cave and what a difference! No dents, just splash; same distance. AR Plate (trade names such as:"Algoma 500 , AR500, Hardox, etc. Exact furnace controlled temperature is not required, a heat crayon should suffice. AR400- better for impact applications, AR500-. Spinners, speed racks, gongs. This alloy wear plate offers excellent service for applications where formability, toughness, weldability and abrasion resistance are required. One of two abrasion-resistant grade steels offered here at SendCutSend, AR400 steel is formulated to take a massive amount of punishment and abuse. High Strength Steels. In contrast, the cost of AR400 ranges from $400 to $650 per tonne. 96” and lengths up to 629. Download Now. Testudo-Gen-2-bundle. ASTM A131 A&B / ABS A&B; ASTM A131 / ABS AH36 / ABS DH36 / ABS EH36; API 2H Grade 50; ASTM A633; PVQ Steel Plate. With an extra 50 HBW hardness over AR 400 grades, it provides additional wear resistance for an extended service life. In construction and fabrication, the grade and composition of the steel plate materials used make a huge impact on the final product. . Minuteman. The use of AR400 is in high wear resistance and is perfect for mining machinery and heavy-duty machinery. We stock AR400 Wear Plate in sizes from 1/8″ thick up to and including 4″ thick. The Brinell Hardness Number (BHN) is the technical difference between AR400, AR450, and AR500. Its tensile strength ranges from 155,000 to 180,000 psi, while its Brinell hardness ranges from 360 to 440, depending on the thickness of the steel. AR450: 430-480 BHN Typically. The subreddit for long range precision shooting enthusiasts. Difficult to weld: Higher alloy and greater Carbon content require precise preheat and welding procedures. Disclaimer: I haven't done AR500, just AR400. D. That extra 1/8” from 3/8->1/2 makes a huge difference in rifle durability. AR500 | AR500F Steel Plate. Minuteman. User NameAr400 Vs Ar450 Vs. This curved armor plate has our durable FragLock™ coating and is especially mobile at just 5. $427. These elemental differences help the steel achieve a higher surface hardness. 1/2" AR500 will handle high velocity boattail . The difference between common steel plate & abrasion resistant steel plate is significant, but the differentiations between AR400, AR450 & AR500 are more subtle. 57 with. The main advantage of AR400 steel is its superior durability—it can withstand much more wear than ordinary mild steel and is more resistant to corrosion. I hardness tested some plates with a Rockwell hardness tester setup for the C scale. Its resistance to wear is astonishing, as it resists heavy wear, slide wear, and rub wear. Oct. Due to the large difference in yield strength between the AR400 plate and the filler material, minimizing weld restraint is critical to control cracking of weld. Much like AR400 and AR500, AR550 steel is a specific type of abrasion resistant steel. My last sentence is 100% of my knowledge of the physics, but anecdotally (I shoot A LOT) I can tell you that AR500 targets are MUCH more durable than AR400 of the same thickness. So they said they would cut me a deal on the next. AR400 | AR400F Steel Plate. A36 s. . Domestic Steel. I plan on using 1/4 Ar500 plate but am unsure of the process needed to weld this type of steel. Moderate pressure, no real problem other than a resharpening exercise on bits afterwards. Chemical composition of hardox 450 vs ar500 equivalent AISI. If you need abrasion or wear-resistant steel materials, give us a. The spall angle range for the AR400 vs. We also offer High Definition Plasma Cutting for custom shapes. User NameAR400 vs AR500 Guns & Ammo Discussion. . glass, coke, coal, wood chips, bottom ash, rice, and stone) can cause premature wear. 5 mm) thick plate, and at least 110 ksi (758. When it comes to cost, Hardox is more expensive than AR400. 9mm FMJ was 7. The spall angle range for the AR400 vs. One common grade of abrasion resistant steel is AR400. Using HARDOX® components in your equipment helps to protect both machinery and workpieces from undue wear and tear, thereby extending the service life of your equipment as much as 10 times the norm in some applications. Feb 28, 2019. Also, while Ar500 has high abrasion resistance, Ar400 possesses more impact resistance. AR400 Flat Bars; ASTM A514; ASTM A829 AISI 4130/AISI 4140; Marine & Offshore Steel Plate. 1°. When a project calls for AR plate, it is generally because of the length of wear on the plate is minimized. The most popular steel for shooting targets is 3/8″ thick AR500 steel plates. A285 Steel Plate. What is the difference between AR400 and AR500 steel? The Brinell Hardness number differentiates the abrasion resistant steel grades. The Drip Cap. AR500. This is a high-carbon alloy steel that is perfect for rugged applications that require high wear resistance. Our Dueling Tree uses a unique system that allows gravity to assist in the reset to keep you shooting. 145th St East Chicago, IN 46312. Details. A285 Steel Plate. Alloy Steels. 308 is not allowed cause supposedly it will go through, where as 500 it won't. However, this comes at a cost—AR400 steel tends to be much more expensive than mild steel. I have a customer who is wanting me to drill and tap some 1/2-13 holes in some AR 400. 3 HRC compared to RHA at 43. Unlike paper or other single-use marks, AR500 steel shooting targets won’t shatter or spread debris, which makes cleaning up fast and. On average, a 10×12-inch AR500 steel plate weighs about 8-10 pounds. Here's the breakdown. 54 with. AR plate is a high carbon alloy plate. AR450 VS. Since the beginning of this year, the global Hardox 450 vs ar500 steel pipe industry, like many other industries, is facing severe market situation. AR500 = AR500 is a premium abrasion. 4. In the case of AR400 steel plate, 400 is the plate’s nominal hardness, and it has a hardness range of 360 to 440. However, this increase in strength and. . While AR400 offers a good balance of hardness and toughness, AR500 provides enhanced hardness and penetration resistance. Alpharetta (Atlanta Plate Processing) 2005 Grassland Pkwy. AR400 steel is sometimes used for low velocity rimfire ammunition, and AR550 steel is recommended for high powered rifle ammunition. It offers higher deposition rates than GMAW, handles dirtier plates, and uses lower cost 100% carbon dioxide. Apples and oranges comparison, but it still makes a difference. AR450 and AR600 steel plates are also available, but they’re a bit less common. User NameThe Testudo Lite still accommodates both 10”x12” or 11”x14” body armor of any type. As far as the Testudo, I own one and can’t really recommend it. 157 - 5. For example, a 1/2″ nominal plate is typically a 1/4″ overlay applied to a 1/4″ of base plate. We rate all of our 3/8″ targets for rifles such as 5. 1/8″ to 1″ Thicknesses. 16 per LB) delivered to my shop. The . I have both and from my experience the AR400 is much worse. I know that welding the 400 with a mig does no good, not enough penetration. These below mentioned castes or communities are assumed to be not included. 25 0. What is ar500 steel? AR500 steel plate is chemically similar to AR400 steel plate, except the hardness range is higher and it has more carbon and manganese than AR400. AR500 VS. AR400 is a quench and tempered steel and may be difficult to weld due its high strength and hardenability. 500 Brinell = 53 Rockwell C. I have also used ar500 on a number of heavy equipment repairs and it is real hard. You name it. com January 11, 2023 No Comments AR 400 Steel Vs. AR500F exhibits an optimal combination of hardness, abrasion resistance, formability, and weldability. 5°. Through work I have access to AR200 and AR400 from our supplier. AR steel tends to come in between 235-550BHN. Usually, abrasion-resistant steel is termed “AR450F” and “AR400F” (and at times “AR500F”). Meanwhile AR500 / AR500F is not formable, but shows good machinability. 223. Stationary Steel Targets . AR450 and. What is the difference between AR400 and AR500 steel? Abrasion resistant steels are classified by their typical Brinell Hardness Number. Much like AR450 and AR400, AR500 steel is a specific type of abrasion resistant steel with a surface hardness of 477-534 BHN. The modular design keeps the system. This is a little girls load compared to most of the things guys are shooting in here. Certificates with a traceable lot number are available for these. 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. Class 3: Testing and evaluation. Per square foot, a 3/8-inch plate weighs around 7 pounds. AR400 + AR500 abrasion resistant plate, bar & strips. e. AR450 is an Abrasion Resistant Steel, much like AR500. 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. 2100-4000ft-lbs = ½” AR500. Hammer Pins & Tie Bolts; Manganese Separator Drums; Shredder Wear Parts; Wear Pipe. AR450: 430-480 BHN This material is slightly harder than AR400 and is also a popular material to make grinder screens. There are different types of steel, for example, AR400 OR AR500, that are produced to a specific hardness. Kromite® #3 (4140/4150 mod. A preheat and interpass temperature of 250°F to 350°F is generally sufficient, (350°F to 450°F for 500BHN Plate). These Q&T plates are generally used for abrasion & wear resistance. T1 – VS AR 400 This is a common discussion that we have with customers because a lot of our competitors use Mild Steel and the better ones use T1. Surface hardness of 360-440 BHN. Request a Quote. The major advantage of A992 is its improved material definition and like A572 GR 50, A992 can also offer some cost. It has a lower hardness of 360 – 444 BHN. View in full-text. . 25x the tensile strength of AR400, as well as a higher yield strength and tensile modulus. For over 50 years, customers in multiple industries have all relied on Clifton Steel products for the durability. Hardness testing AR500 steel plate. Aplicaciones. When we buy the AR400 3/8 the steel company cuts the one edge with a torch and it's rough as a cob. AR500 targets are made to be durable, highly visible and ring loud when you hit them. AR400 vs AR500 steels are both excellent choices for applications demanding resistance to abrasion and wear. 22 up to . Up to . For more information regarding the differences between AR400, AR450, and AR500, visit our AR450 page here. While AR500 has exhibited excellent resistance to high impact stresses, we still have found it to be lacking when it comes to the ability to mitigate. AR400 steel is a high-carbon alloy designed explicitly for abrasion and wear resistance. A514 steel is available in a variety of chemistries: B, E, F, H, Q, and S. . and aside from my dedicated . 223/5. SSAB Abrasion Resistant Commercial Steels are designed to maximize abrasion resistance while providing good formability and weldability. Full Member. ABS Grade A, B, AH36, DH36, EH36; API 2H Grade 50;. It is a high-carbon steel alloy that provides greater impact and sliding abrasion resistance by comparison. The AR steel grades include: AR200, AR235, AR Medium, AR400/400F, AR450/450F, AR500/500F, and AR600. Physical Properties. Here is an experiment to try. 5″) Ability to “Work Harden” from 470 BHN to 560 BHN. In fact, Clifton Steel’s Clif-Clad chromium carbide overlay plating can withstand even severe. T-1 steel, unlike AR400, is an alloy steel covered by ASTM A514 / A514M - 05 (2009) Standard Specification for High-Yield-Strength, Quenched and Tempered Alloy Steel Plate, Suitable for Welding. The “AR” in AR500 steel actually stands for Abrasion Resistant, while the number, in this case 500, indicates the Brinell Hardness Number (BHN) which falls within 460-544 for most AR500 steel. What is the difference between AR200 and AR400? AR200 and AR400 are both Abrasion Resistant steel plates. wear is a fine line to walk. The subsequent grade would be an alloy called 4340. First of all, MIL-A-46100 is a military grade, whereas AR500 is an Abrasion Resistant grade. 25 0. Specifically looking at 3/8” AR500 and 5/16” Mil-46100. This is some strong mild steel or shitty ar500Dec 14, 2022. 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. AR plate is a high carbon alloy plate. AR550 and AR600 plates of the same size would be lighter due to their increased thickness and hardness. 338 Lapua 200gr SP 3,330 fps 4,967 ft/lbs Re: AR400 compaired to Hardox 400. 50-caliber 500 Auto Max cartridge, the AR500 packs a wallop in a modified AR-10 platform. JFE-EH-C500 Plate is suitable for heavy pieces of machinery such as tonnage ships and excavating cranes because of its heavy thickness. In the case of AR400 steel plate, 400 is the plate’s nominal hardness, and it has a hardness range of 360 to 440. Ar500; In fabrication and building, the composition and grade of the steel plate materials used have an amazing effect on the end product. At present, the AR material with or without the “F” is interchangeable, but — traditionally — material with an. $169. El AR400 tiene un límite elástico de 250 ksi en comparación con sólo 50 ksi en AISI 1045. Weight difference is basically a wash. AR500: 460-544 BHN Although this material is the hardest of the above 3 and will wear long, the steel is brittle and is not recommended for grinders. However, they differ in terms of hardness. Say hello to 40 mm thick hard AR 400 plate. AR400 steel vs T1. Grades like A514 have greater tensile and yield strength due to their increased toughness and strength than non-heat treated alloys grades, such as ASTM A572 Grade 50, which can be seen in the chart below. 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. For technical drawings and 3-D models, click on a part number. User NameAR400 vs AR500 Guns & Ammo Discussion. 3. AISI 8620 . 5t can be used when bending parallel to the roll. . 9mm FMJ was 5. This. Chocky blocks are a common term for these high Chrome cast white iron wear blocks. AR500 can resist wear and abrasion, both improving equipment’s longevity and increasing production time. The AR400, on the other hand. With the mild steel targets, they end up looking like the lunar surface a lot more quickly than the AR500 steel. For me, one sheet of . However, due to their hardness, they can. We are a Cleveland, OH based steel supplier with specialties in AR400, AR500, A514, Manganese Steel, Armor Plate, and other specialty steels. Phone: 800. * Glancing impact shots – handgun rounds. Shooting would largely be . 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. 118", and as sheet in thicknesses of 0. They are cut out of AR400. Ar400 is common, the 500 isn' as easy to find without a special order in my exsperience. D. The AR500 steel will last long, and can deal with more powerful rounds that mild steel won’t be able to deal with. Winco-Tuf 40 is for use in areas where AR400/AR500 are currently used. Another key differentiator is applications. bucket components, construction equipment and wear plates used in plows and farming equipment. 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. Price difference is within a couple bucks between the two (AR500 being a few dollars more). SLS 600 ® Induction Wear Pipe; CLIF-CLAD ® Overlay Pipe; G 2T ® Ceramic Lined Pipe; Steel Round Bars.