5. It’s also a basis of its superiority as this trait guarantees its ability to retain its shape for much longer. The originators of the steel added more carbon, chromium, vanadium, nickel, and molybdenum to improve on the original 1095 steel. According to the chemical composition and the HRC of the steel, the CTS BD1 Steel has the following features: CTS BD1 Edge Retention: CTS BD1 Offers great Edge retention compared to low-end steels, with a maximum of 60Hrc, you can expect a good hardness from this steel. I think among the three knives, the SOG has the best comprehensive performance. Compared to the harder (and more expensive blades), 3CR13 Stainless Steel doesn’t really maintain the sharp edge of the blade all that long. BDZ-1 combin. 03%. It features 1095 carbon steel, as opposed to 1075 on. I would like to see a sharper 90 degree edge on the blade spine or on the crushing end for striking a fire steel (The steel on this knife has a peened finish that softens the. or Best Offer. Super tough full tang construction with a sure, comfortable grip. Carbon, 0. Chromium, 15%. CTS BDZ1 - 76 - Gerber Strongarm. United States. The AUS 8 is said to have a Rockwell hardness rating of 58-59 HRc. The CPM S35VN steel is among the best all-around steels, if not the best. Specializing in carbon steel, aluminum and stainless steel processing and distribution, Alliance Steel has made its name by exceeding market standards for precision, quality,. Cold Steel – 23-25. com. 4% to 1. T. (40) 100% agree - Would recommend. 16-degree angle for extra sharpness with an HRC of 60. Larger enough blade, vg-10, $50 range. By specs it belongs to German W-Nr 1. Gerber Empower Automatic Folding Knives $197. Easy action thumb stud opener. Often described as ‘simple’ and ‘old’, it’s often hinted that this steel grade is. . The knife has a left to right swappable deep carry clip. If you ever heard or used one of the buss. S. CPM 3V will get stained more than M390 but will be more reliable in the field. 00 shipping. 1; Location of This Business 307. I some how chipped my 890 quickly, its hard to sharpen. Its edge retention also matches the 420hc, and it’s almost (but not quite) as easy to sharpen as the 420hc. K390 Steel Hardness. That’s higher than the 0. The Kershaw Blur is a favorite among knife enthusiasts. from. News, Product News. MADE IN: U. Its high-wear resistance is ideal for tools that need less frequent sharpening. I purchased this knife new and put it inIF you need to contact us for any Reason you can contact us at 816-579-5634We will contuine to try to please our customersNEW IN BOX MADE IN AMERICANORMALLY 140. According to the chemical composition and the HRC of the steel, the ZDP-189 Steel has the following features: ZDP-189 Edge Retention: With a maximum hardness of 67HRC, the steel can offer a great hardness that’s going to result in an exceptional Edge Retention!. The Kershaw Blur is a favorite among knife enthusiasts. Neto, Tristan, Gareth Chen, Alvise Miotti Bettanini, Henjie Taguinod, ben horridge, Steven, and Ian Miller for becoming Knife Steel Nerds Patreon supporters! This study alone was about $12k. Gerber Empower Automatic Folding Knives $197. While the XR lock springs are stiffer than Benchmade's Omega Springs, the two Terminus XR in CTS-BDZ1 steel I've had no problems with. This process produces an excellent, uniform carbide distribution. Silicon, 0. 440C VS VG10. Made In United States of America. It’s made from a mixture of Tungsten, Vanadium, Cobalt, and molybdenum. Common Uses of CPM S110V Steel. 05%: This qualifies ATS 34 as a very high-carbon steel. Steel, by its very definition, is an alloy of iron and carbon containing less than 2% carbon and 1% manganese. Yet it’s also a lot tougher (resistant to chipping) than most stainless steels, though 9Cr18MoV steel is tougher. New in clamshell pack. It’s used in the knife industry (Since It has a balanced composition that offers great edge. The CTS BDZ1 steel, clip-point blade measures 2. . Strong liner lock for safety. Closed Federal HolidaysThe 4110 and 4116 are very similar in composition so they’re always compared against each other. Black anodized aluminum handle with Trac-Tec inserts for grip. 60/0. 40%: This also boosts hardness and strength. While the CTS BD1 is in the upper-midrange tier, the BD1N is at least in the high-end tier of steels. There is another steel used in earlier models. C75 Opinel - 66. 00 (Save 10%) $177. Tactical Grey with upgraded, stonewashed BDZ-1 s. Max working hardness around 60HRC. 40%: In importance, this is second only to carbon. 49. Composition Comparison Graph For The Knife Steels Bohler-Uddeholm AEB-L, Carpenter BD1, Carpenter BD1N, Carpenter BDZ1 Version 4. Leopcito 10" Fixed Blade Tactical Knives with Sheath and Clip, Stainless Steel Survival Hunting Bushcraft Full Tang Non-Slip Handle Outdoor Knife for Camping, Hunting, Adventure, Outdoors, EDC. Kershaw Blur Assisted Opening Knife, Tiger Striped BDZ1 Steel Blade. 08". 75 C, 1. Tags Tools Shopping. 26 inches closed; model number: TM1021-BX Business, Economics, and Finance. This limited run model features a tactical grey GFN (Glass Filled Nylon) handle complete with a rubber overmold, a drop point style BDZ-1 blade in a stonewash finish and the molded polymer sheath allows for a variety of carry options. Excellent condition, some scratches, razor sharp, no box. That’s why it’s a great choice for use for hunting, camping, bushcraft, and tactical. Gerber Propel Downrange Ao Automatic Folding Knife $198. 9 OZ KERSHAW BLUR BLACK POCKETKNIFE: A classic Kershaw with a do-it-all blade and dark good looks, the Blur is the perfect EDC for multi-tasking thanks to its big, slightly. 75%. mark76. Phosphorus, 0. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. The SOG Terminus XR has an comfy ergonomic shape with SOG's smooth XR locking mechanism. EDC FOLDING KNIVES FOR EVERYDAY CARRY: The Terminus XR is a razor-sharp EDC folding knife and flipper knife made with strong, capable, cryo-hardened CTS BDZ1 stainless steel; blade measures 2. There are a few scratches in the bI am a Chinese player, I use machine translation English to communicate with you, please forgive me. . Its always sharp but loses the razor edge with light use the quickest. mark76, Jun 13, 2016. HANDLE G10. The 1670TTS features a Tiger Striped CTS-BDZ1 Steel Tanto blade that’s matched with Black Trac-Tek inserts for an extremely solid grip. It’s just that the 420hc offers excellent corrosion resistance, but the 1095 does poorly with moisture and can rust very easily. It’s a platform to debut new steels for the customer looking for something a little bit different. It has black and green handles and a black tanto blade that is BDZ1 steel. CTS BDZ1 - 76 - Gerber Strongarm. I consider my VG-10 blades to be great for EDC and light/normal use but not so much as a work / "hard use" steel, both BD1 and 154CM on the other hand I have no problem putting to hard work. $55 will get you the basic G10 version of the SOG Terminus XR, with a 3” drop point blade in cryo-treated D2 steel. The Blur has also become a place for steel experimentation for Kershaw. Benchmade HK Blitz. CTS-BDZ1 is a budget-friendly stainless knife steel produced by Carpenter Technology Corporation based in the United States. 2%. The knife features a CPM154KershawBlur KnifeBlack Tanto Edge - Black Handle1670TBDZSpecificationsMade in the USA SpeedSafe® assisted opening Liner lock Thumb stud Reversible (tip-up/tip-down. 24427 posts · Joined 2004. Black reversible pocket clip for tip-up or down carry. Best Use: Tactical. By specs it belongs to German W-Nr 1. Strong liner lock for safety. 95", making it legal to carry in districts with a 3" maximum blade ordinance. Maxamet steel is super-hard, and it offers insane levels of edge retention and wear resistance. Featuring a fine edge, full tang 420HC. With a sheath that can be mounted in a variety of ways, this knife offers reliable use whether on-duty or off. 3 1/4 stonewash finish CTS-BDZ1 stainless standard edge Tanto blade with dual thumb studs. What is BDZ1 Steel? Is BDZ1 Steel Good for Knives? BDZ-1 Steel Review. Who makes CTS BD1N steel? An American steel by Carpenter, CTS-BD1 is a vacuum-melted stainless steel that is highly corrosion resistant and holds. One resource I stumbled upon the other day is the Spyderco Steel Chart. New in box, never used or carried, with all paperwork. Manganese, 0. Black reversible pocket clip for tip-up or down carry. Yes, 1084 is good steel that you can use for knife making and also if you are a beginner. Made with BDZ1 steel, the Ghostrike Series Fixed Blade's stonewashed finish enhances corrosion resistance and minimizes the appearance of scratches over time. The 1670PURBDZ Blur features a stonewash finished CTS-BDZ1 steel tanto blade with a plain edge and a purple anodized aluminum handle with Trac-Tek inserts for superior gripping power in all conditions. CTS BDZ1 steel blade, high corrosion resistance and good edge retention. my kinda thing. CTS BD1N steel is an upgrade to CTS BD1. 03%. This knife is lightweight and easy to carry, and it comes with a discreet pocket clip that can be. Strong liner lock for safety. 3. . I have not EDC the Skyline Damascus but I have EDC did Kershaw Damascus. $48 via PayPal gets it to you your door. The Terminus XR opens with 3 different methods: it has a jimped blade flipper, dual thumb studs, or by holding the sliding switch back on the side of the knife and flicking the knife with force. 8% to 0. 19". 5" Stainless Steel Blade Alu. 95 MSRP it’s undeniably a great deal, although like the Fastball the pocket clip is truly awful – it submarines in the. I like the Skyline so much that I bought backup copies of it. Easily the most popular category today for EDC knives and includes the 400, 154CM, AUS, VG, CTS, MoV, Sandvik and Crucible SxxV series of steels. . 5. Made With CTS-BDZ1 Stainless Steel - As Always All Orders Ship For Free The Kershaw Green Stonewashed Tanto Plain Edge Knife is perfect for camping, outdoor adventures, or even home or work related tasks. H1 Steel, fully serrated, yellow FRN, only used a couple times. The 8Cr13MoV steel is part of the Cr family, and it’s notable for its relatively high content of carbon and chromium. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX Tesla. Tactical Grey with upgraded, stonewashed BDZ-1 steel boasting high hardness, better edge retention, So far i like it . SPECIFICATIONS: Blade Length: 4. The 1670GRNBDZ Blur features a stonewashed CTS-BDZ1 steel Tanto blade with a plain edge and a green anodized aluminum handle with Trac-Tek inserts for superior gripping power in all conditions. Stainless Steel. 828 views, 24 likes, 4 loves, 42 comments, 5 shares, Facebook Watch Videos from Smoky Mountain Knife Works: The guys show off the top five new arrivals at SMKW, including items from Rough Rider,. This proprietary alloy is part of the CarTech CTS family of alloys, offering superior edge retention and surface finish and an ability to be machined to a fine edge and consistent heat-treatability from lot to lot. Knives, Erik Coccia, Francisco J. Highly stain resistant, used for razor blades and other utility applications. Highly stain resistant, used for razor blades and other utility applications. This model features a tactical grey rubber handle, a modified drop point style blade in a stonewash finish and the molded polymer sheath allows for a variety of carry options. The “CPM” in the name of the steel stands for Crucible Particle Metallurgy. Kershaw Blur Assisted Opening Green Handle BDZ 4 1/2 closed linerlock. Black reversible pocket clip for tip-up or down carry. If anything m390 is slightly more advanced because it uses a 3rd generation powder steel process and 20cv (as well as cts204p which is the same steel by a third company) use a second generation process. BDZ1 or BDZ-1 Steel is stainless steel, mainly used for knives and razor blades, it belongs to the CTS Family from CARPENTER, they’re known to offer great edge retention and used for kitchen knives, hand tools, scissors/shears, shaving razors, sport/hunting knives, ice skates, military/defense, law enforcement, salon blades, and various surgical. Brand: Kershaw. 1095 75 (ESEE 4) 69 (SCHRADE 42D) VG1 - 73 - Cold Steel SRK. The CTS BDZ1 steel, clip-point blade measures 2. What’s more, it also. In normal use, you'd have to constantly use the knife everyday for months before the edge dulls to the point where you can't slice paper unless you're cutting fiberglass or cardboard all day. A martensitic steel chemically balanced and processed to provide a uniform, fine carbide structure. Made in the USA SpeedSafe® assisted opening Non-Serrated BDZ-1 Tanto Blade Trac-Tec inserts for added grip DescriptionThe Tanto Blur offers all the great grip advantages of the other Blurs on the forcSo, I didn't make it on Friday, so they were out of ZTs but I managed to score an old Breakout, two Emerson CQC4s a tomahawk, two of the military boot. This Kershaw Blur features a tiger stripe finished CTS-BDZ1 steel tanto blade with a plain edge and a black anodized 6061-T6 aluminum handle with Trac-Tek inserts for added grip in all conditions. This 8cr13mov is a rather affordable steel from China, and you have brands like Spyderco that use it. Meanwhile, the X50CrMoV15 steel is more common, and it’s proven to be reliable. It is described as a fine steel, for a fine edge. The Kershaw 1670TBDZ Blur features a black finished CTS-BDZ1 steel tanto blade with a plain edge and a black anodized aluminum handle with Trac-Tek inserts for superior gripping power in all conditions. But, CPM 3V steel is a lot more durable, especially for outdoor and rugged use. Anyone interested in a Lionsteel Mini Opera? Reply, PM, or email me;) D2 with OD green G10 scales. SOG XL Slimjim & Standard Size Slimjim. CTS BDZ1 alloy is an excellent candidate for razor and utility blade applications, which demand high hardness and edge retention. Priced $69. Moderate Toughness: As the hardness level of LC200N steel is high, the toughness level is low because these two factors are indirectly proportional to each other. 5 to 0. I some how chipped my 890 quickly, its hard to sharpen. Kershaw – 20-22. 10%. Black reversible pocket clip for tip-up or down carry. The general range is from 54 to 58 HRc but according to one manufacturer, the 4034 has a hardness of 56 HRc after quenching. XR locking mechanism: ambidextrous, snappy, and adjusts over the lifespan of knife. This structure has been suitable for the manufacture of thin sections and fine blanking operations. Silicon, 0. The 1670PURBDZ Blur features a stonewashed CTS-BDZ1 steel Tanto blade with a plain edge and a purple anodized aluminum handle with Trac-Tek inserts for superior gripping power in all conditions. Part of that is due to the actual shape of the knife, but a lot more is because of their steel. S. Crypto With upgraded BDZ-1 steel, the Ghostrike is better prepared for tasks that demand more from your blade. ZDP-189 Wear Resistance: Excellent Wear Resistance. By specs it belongs to German W-Nr 1. The Kershaw Blur is a favorite among knife enthusiasts. The CPM 154 is chemically the same as the 154CM, but the CPM 154 is the powder version as it undergoes a different manufacturing process. A black coated/tumbled tip up or down carry pocket. . Kershaw – 20-22. United States. Shipped with USPS First Class. It is a great EDC, I carried one regularly until I got really hooked on the Blur tanto with BDZ1 steel. 8K subscribers. It’s the main reason why some 15n20 blades feature a hardness rating of 62 to 62 HRC. The most noticeable difference here is how much better the CTS XHP steel is at retaining its sharp edge. gravy its bricky on thingsSubscribe and hit the bell! Hit like and all t. The Rockwell hardness rating for this material can go up to 62 to 64 HRC, some even saying it can go up to 65 HRC. 40" Tiger Striped Sandvik 14C28N Tanto Blade, Black Aluminum Handle. D2 is a high-chromium, high-carbon alloy tool steel. Shop our selection of sheet metal, brass & aluminum rods for all your renovation needs at the Home Depot Canada. EDC FOLDING KNIVES FOR EVERYDAY CARRY: The Terminus XR is a razor-sharp EDC folding knife and flipper knife made with strong, capable, cryo-hardened CTS BDZ1 stainless steel; blade measures 2. The skeletonized handle allows for a low profile carry. $79. 35%. $28. Kershaw Blur Black (1670BLK) Everyday Carry Pocketknife, 3. Made in the USA. This is a well used knife that is still a super smooth flipper. . Black reversible pocket clip for tip-up or down carry. ESEE 4 VS ESEE 5 – A full comparison of ESEE 4 VS 5. The IZULA Neck knife is the most recognized Skeletonized Neck Knives on the Market, it comes with a 2. 4037 spec CTS-BDZ1 contains trace amounts of Molyubdenum, upto 0. Being low-end stainless steel, the 420hc is a great steel for the low-entry knife, it has decent edge retention, good corrosion resistance, and it’s easy to sharpen, so the answer is Yes, its good for knives. SOG Terminus XR Flipper Knife, CTS-BDZ1 Satin Blade. . 95 inches, knife measures 4. 1095 75 (ESEE 4) 69 (SCHRADE 42D) VG1 - 73 - Cold Steel SRK. Country of Origin: USA. Lately, I was checking a knife from LION STEEL and. It’s also commonly referred to as “ Cutlery Spring Steel ”. 154cm Steel. CTS BDZ1 alloy is an excellent candidate for razor and utility blade applications, which demand high. The Kershaw Blur is a favorite among knife enthusiasts. This datasheet provides information on composition, physical properties, and hardness. They also did the same for one of their smaller fixed skeletonized fixed blades in BDZ1. CARPENTER CTS BDZ1 ALLOY - Martensitic Stainless Steel. 6. Black reversible pocket clip for tip-up or down carry. Gerber Ghostrike Fixed Blade Knife Gray Rubber (3. The BD1N is definitely better. But then it’s much easier to sharpen. I think the nitrogen in BD1N is to allow for much greater hardness which is going to make this something different. It had BDZ-1 blade steel with plain edge and black handle. How to Clean Your Airsoft Gun: The Basic How-tos and Some Do’s and Don’ts. The 52100 steel is one hard steel which is one of the reasons why it’s selected for the applications it’s used in. BlackIts stout clip point blade is made of CTS-BDZ1 steel, which means you get good sharpness and excellent resistance to rust even after a long period of usage. It’s got an excellent, well-rounded drop point blade that’s sub-3 inches and features a flat grind with a stonewashed finish. 20%: This also helps with corrosion resistance. $35. 3 inch fine edge clip point blade serves to slice and rip with precision. Tctbnl. (all 50 states are good to go) Bushcraft survival used $45 shipped This one is special! Its a YP Taonto Leuku blade in 80CRV2 that I handled in. The fully ambidextrous design has a surprisingly great flipping. What is bg42 steel? – BG42 Steel Review. #3. Thus BZD3 acts as mixed-type inhibitor whereas BDZ1 and BDZ2 operate predominately as cathodic inhibitors. 5 versus around 11) which means it’s more corrosion and stain resistant. 95” blade capably handles both piercing and general. #1. But I saw on U-tube, where I stumbled on the Grey's existance, is due to. from 897729047I’m looking for a thin drop point folder that holds an edge. 9cr18mov - 72 - Freewolf Knife. 00%. 2% – There are numerous ways in which EN 45 steel. In comparison to the new lower-priced versions of the Terminus XR which have D2 steel, BDZ1 has lower carbon content (actually around half, 0. 99!MADE IN USABRAND NEW IN BOXThe Kershaw Blur is a favorite among knifeUnboxing Orchid Haul from Elsner Orchids and Orchids & More - July 2016,In-Depth FIRST LOOK: Kizer Assassin from Carlos Elstner (Incl. 4%. Carbon, 0. It always seems every cool limited. I think for EDC I'd like BD1N better, but honestly the BD1N, while a substantial upgrade to BD-1, really still doesn't compare to my normal EDC blades (which are all pretty "high end" steels like Maxamet. The hardness leads to many benefits, like wear resistance. Mo, Bal. Because of its reliable hardness and general durability, it makes for a great steel for combat. . Joined Nov 27, 2017 Messages 4. 99. com. Use will mostly be generic EDC tasks. 2% – There are numerous ways in which EN 45. The 1670PURBDZ Blur features a stonewashed CTS-BDZ1 steel tanto blade with a plain edge and a purple anodized aluminum handle with Trac-Tek inserts for superior gripping power in all conditions. You mentioned the Ka-Bars. Thanks in advance!Buy Now 5 KERSHAW BLUR KNIVES. It is a modification of 420 steel hence the M in its name. PO Box 56 Cassidy, BC V0R 1H0. 1095 CRO Van steel is a type of carbon steel, meaning it contains a significant amount of carbon to bolster its hardness. Free shipping on select items. It doesn't have the best edge retention, but there's no stainless steel I can get sharper. Gerber Strongarm with BDZ-1 steel. This structure has been suitable. 326K subscribers in the knives community. Carpenter CTS BDZ1 alloy is a martensitic steel chemically balanced and processed to provide a uniform, fine carbide structure. Made in USA. 95 oz. The other dies before getting to the hospital. Terminus XR is the ideal EDC knife for most use-case scenarios. ( I have only 1 available for sale now. Sulfur, 0. This puts this steel grade in the softer end of the scale as super steels are usually beyond 60 HRc. Was disappointed it being a 2,000 only run they were to dumb to number the knives. What is SR101 steel? A complete SR-101 Steel Review. Black reversible pocket clip for tip-up or down carry. The originators of the steel added more carbon, chromium, vanadium, nickel, and molybdenum to improve on the original 1095 steel. Schnitzer Steel Canada Ltd. Steel gurus, where's the difference? Any advantages over BD1(N)? Could anyone post size & thickness comparison pics of the Squarehead versus the Dog Tag? I think I like the DT design more (rather have aluminium than FRN), but also the size is a factor. Steel is essentially an alloy (i. Kershaw Blur Black (1670BLK) Everyday Carry Pocketknife, 3. 7% of Chromium for maximum strength, edge retention, and enhanced corrosion and wear. Handle Kershaw Blur Tiger Striped Folding Knife 3. Sold. What is N690co steel? This is a special type of high-carbon and cobalt stainless steel, made by the German brand Bohler. May 1, 2020 Larrin. With that said, CTS BD1N offers better edge retention and wear resistance. The 440C has the highest carbon. CryptoKershaw 1670PURBDZ Purple Blur Assisted Opening Pocket Knife LIMITED EDITIONNEW Kershaw 1670PURBDZ Purple Blur Speed Safe Assisted Opening Pocket Knife with CTS-BDZ1 Blade Steel!LIMITED EDITION!!FPost what you want to buy here before making a dedicated thread for it. . 1085 Carbon Steel Review – Is 1085 steel good for knives? Read More »Kershaw Link Review – Final Thoughts and keeps fine. Made in USA. Jun 20, 2013. It features a rubber grip on the skeletonized handle to give a secure feeling in the hand. X50CRMOV15 vs 8CR13MOV Steel. 36Shop our huge selection and great prices on knife brands like Protech, Boker Plus, Switchblade's, automatic knive's and custom knife sale's. 50 Cr, 0. Tactical Knife: The Strongarm knife features a coyote brown handle and a serrated edge, full-tang steel blade ; Survival Knife: This durable knife has ceramic blade coating and rubberized diamond texture grip ; Survival Gear: This survival tool can break through hard surfaces in emergencies with the striking pommelColors have been adjusted to an urban pairing of stonewash finished BDZ-1 and tactical grey overmold, a subtle combination welcome to any user’s kit. Try out any of the knives on our list, and you might even miss using your sharpening system. D2 is usually a very hard steel, with a carbon content within 1. . 38. While it doesn't command. Larger enough blade, vg-10, $50 range. 4037 steel group, however unlike the 1. . 5″ Handle Material: 6061-T6 Aluminum See More Reviews for the Kershaw Blur OUR IMPRESSIONS OF THE KERSHAW BLUR. 00. Gerber just announced it will debut limited-edition versions of two best-selling products: the StrongArm Fixed Blade and Ghostrike Fixed Blade. To me this is this a first, a fixed blade Gerber knocked out of the park. 4034 Steel Hardness. $55. 2% – Carbon is an essential element in EN45 steel construction, it increases hardness and provides corrosion resistance, but it can also have some negative effects: The more carbon available in the steel, the weaker it becomes. If you have been researching knives online, then you have probably heard BDZ1 steel name quite a lot. It locks up with the XR lock which is functionally identical to the Benchmade Axis lock (note that the patent on the Axis lock has expired last year). Gerber StrongArm with the upgraded BDZ-1 Steel. The Blur has the build and. EN 45 Steel Chemical Composition. 800-875-7624. 29 $30. From the. It's a lil better in edge retention than the 420hc the original strong arm has. Business, Economics, and Finance. The AEB L steel is very hard, so that it works for many blades. Highly stain resistant, used for razor blades and other utility applications. CTS BD1N is alloy nitrogen-bearing high carbon chromium martensitic steel, and therefore offers higher hardness than CTS BD1. 025%: A little is more than good enough, since too much of it reduces a lot of the steel’s impact properties.