A2 Tool Steel. A2 tool steel is an air hardening, cold work, chromium alloy die steel that is preferable to O1 tool steel in applications requiring greater size stability, machinability and safer hardening. The wear resistance …AISI Type A2 Tool Steel Categories: Metal; Ferrous Metal; Tool Steel; Air-Hardening Steel; Cold Work Steel. Material Notes: High hardenability, high degree of dimensional stability in heat treatment, good wear resistance, fatigue life, toughness, and deep hardening qualities. Steel A2 is a Tool Steel (High-alloy steel) that has on top of the 1% of carbon an additional 7.9% of manganese, chromium, nickel, and molybdenum. (See details in the below table ). Steel A2 has a machinability rating of 42%. Steel A2 belongs to the "A series" of tool steels. They are classified as air-hardening, cold-work steel and contain ... A2 tool steel is an air hardening, cold work, chromium alloy die steel that is preferable to O1 tool steel in applications requiring greater size stability, machinability and safer hardening. The wear resistance properties and cost place A2 between that of O1 and D2 tool steel making it a good all purpose grade for many applications. The ...1,150° - 1,400° F. @ 350°F typical hardness Rockwell “C” 62. @ 950°F typical hardness Rockwell “C” 48. At Southern Tool Steel, we are committed to being the best-in-class decarb free tool steel supplier. Our broad range of quality materials and services is available for distribution nationwide with no minimum order required. A2 Tool Steel. A2 Tool Steel is a versatile, air-hardening tool steel that is characterized by good toughness and excellent dimensional stability in heat treatment. A2 is intermediate in wear resistance between O1 oil-hardening tool steel and D2 high-carbon, high-chromium tool steel. Tool Steel Bar/Tool Steel Round Bar. Tool steels are used to form, cut, shear and mold metals and other materials. Cold work tool steels (D2, D7, A2, O1, S7, S5) are used for roll forming, general tool and die applications, progressive dies, and mining. Hot work tool steels (H13, 2714) are sold into the aluminum extrusion die market, die cast ...Both annealed SAE-AISI A2 and annealed SAE-AISI D2 are iron alloys. Both are furnished in the annealed condition. They have a moderately high 92% of their average alloy composition in common. For each property being compared, the top bar is annealed SAE-AISI A2 and the bottom bar is annealed SAE-AISI D2. Annealed A2 …A2 vs O1 Steel, Brief Comparison. A2 steel is knows as air harden steel while O1 steel is oil harden steel. Here we briefly compare this two tool steel grades as follows. Both A2 steel and O1 steel are cold work tool steel grades in ASTM A681 standard. However, A2 tool steel belongs to A-Group, which have high hardenability …A-2 Steel is an air-hardening tool steel containing five percent chromium which replaces the oil hardening (O1 tool steel). A2 is a good choice when safer hardening, less distortion and increased wear-resistance are required for a job. In addition, A2 steel provides an intermediate grade between the oil hardening and the high carbon, high ...A2 tool steel round bar stock is a versatile material that combines good toughness with excellent dimensional stability when heat-treated. Although its wear resistance falls between high-carbon, high-chromium D2 tool steel and oil-hardening O1 tool steel, this grade provides a strong and tough combination. A2 round bar is used … In heat treatment, A2 Tool Steel Stock is known for its exceptional toughness and dimensional stability. Because of these properties, it is a versatile tool steel with outstanding performance and a low price. It is a medium-carbon, high-chromium tool steel that falls between oil-hardening and D2 high-carbon, high-chromium tool steel. Steel A2 is a Tool Steel (High-alloy steel) that has on top of the 1% of carbon an additional 7.9% of manganese, chromium, nickel, and molybdenum. (See details in the below table ). Steel A2 has a machinability rating of 42%. Steel A2 belongs to the "A series" of tool steels. They are classified as air-hardening, cold-work steel and contain ... A2 tool steel is an air hardening, cold work, chromium alloy die steel that is preferable to O1 tool steel in applications requiring greater size stability, machinability and safer hardening. The wear resistance properties and cost place A2 between that of O1 and D2 tool steel making it a good all purpose grade for many applications. The ...Watch this video to find out about DIY-friendly steel deck framing that won’t rot or warp like wood framing, making it a more durable option. Expert Advice On Improving Your Home V...Virat Special Steels is the largest Supplier, Stockiest, Importer and Exporter of A2 Tool Steel in India, USA and Europe.This material is stocked locally to better service your immediate tooling needs. We offer increased stock in the following grades: – AISI A2 Plate. – AISI D2 Plate. – AISI S7 Plate. Additionally, our facility has a full program of tool steel, stainless steel and FlatGround/Drill Rod to support your needs. Please contact our Rialto inside ...13 Oct 2021 ... A2 tool steel is a versatile, air hardening chromium air-hardening grade of steel that contains 5% chromium. While “stainless” amounts of ...A2 tool steel is known for its balance between toughness and wear resistance. Its composition allows for deep hardening, and it is an air-hardening tool steel, which means it hardens in air with low distortion, unlike some other tool steels which may require more complex treatment processes. D2.Applications: AISI A2 takes a place in the Uddeholm tool steel range between AISI O1 and AISI D2, offering an excellent combination of good wear resistance and toughness. It may be regarded, therefore, as a “universal” cold work steel. For cutting operations the good toughness of AISI A2 gives excellent resistance to chipping … D2 Tool Steel is a versatile high-carbon, high-chromium, air-hardening tool steel that is characterized by a relatively high attainable hardness and numerous, large, chromium-rich alloy carbides in the microstructure. These carbides provide good resistance to wear from sliding contact with other metals and abrasive materials. Tool Steel Comparison Chart. Compare popular tool steel grades A2, M2, D2, S7, O1 using the chart below. Compare grades using mechanical properties including abrasion resistance, toughness, size stability, machinability and grindability. Supply quality metals at competitive prices, with unbeatable service to keep you PRODUCTIVE!The Composition of Steel D2: as per ASTM A681. D2 tooling steel is defined by its unique composition. It’s high in carbon and chromium content, with additional elements boosting its performance. Here’s what makes up D2 steel: Element. Percentage in D2 Steel. Carbon. 1.40-1.60%. Chromium.Dec 21, 2015 · A2 vs O1 Steel, Brief Comparison. A2 steel is knows as air harden steel while O1 steel is oil harden steel. Here we briefly compare this two tool steel grades as follows. Both A2 steel and O1 steel are cold work tool steel grades in ASTM A681 standard. However, A2 tool steel belongs to A-Group, which have high hardenability and may be hardened ... D2 TOOL STEEL SUPPLIER. D2 is one of the most well-known tool steels due to its extreme wear resistance and toughness. These properties combined limit tool failure through breaking, chipping, cracking or premature wear. This grade provides an edge that will stay sharp for a long time.Cold work tool steels optimized for a wide variety of manufacturing applications. A2 and D2 are cold work tool steels with high hardness.A2 Product Guide. Applications | Specifications | Mechanical and Chemical Data | Tolerances. Overview. An air-hardening tool steel with good strength and with excellent …a Except group W, all steels contain 0.03 max S, 0.03 max P and 0.25 max Cu; group W contain 0.025 max S, 0.025 max P, and 0.20 max Cu. As mentioned, amount of sulfur may be increased from 0.06% to 0.15% to enhance the machinability of group A, M, T, H and D steels. b Present in various carbon ranges. c Presence …A2 and D2 are cold work tool steels defined by their extremely high hardness after heat treatment. A2 tool steel is often regarded as a “universal” cold work steel, offering a combination of good wear resistance and high toughness. D2 tool steel is harder and more wear resistant, but less tough.Tool Steel Sheet/Plate A2 is an air-hardening tool steel with good strength and with excellent stability in heat treatment. A-2 exhibits wear resistance that falls between O-1 and D-2 steel. This item is not currently an in-stock product. However, with our superior supply chain we may be able to source this item to provide you with custom ... Tempering: Heat the hardened steel to 150-300°C (302-572°F) and hold for 1-2 hours, then cool in air. This process is used to reduce the steel’s brittleness and improve its toughness. AISI D2 tool steel is a high-carbon, high-chromium tool steel that has excellent wear resistance, toughness, and dimensional stability. About the Material. A2 Tool Steel offers excellent wear resistance and toughness. Due to its high compressive strength and dimensional stability, this material is commonly used to make fixtures, tools, tool holders, gauges and punches. D2 Tool Steel is an air-hardening material, and it offers superior wear-resistance when compared to A2 Tool Steel.A2 Tool Steel is an air-hardening alloy with a composition featuring 0.95-1.05% carbon, 4.75-5.50% chromium, 1.0% molybdenum, 0.9% vanadium, and other …A2 tool steel v D2. Both are cold work steels, with very high hardness after heat treatment. A2 tool steel is a multipurpose tool steel, offering a combination of good wear resistance and high toughness. D2 tool steel is harder and more wear-resistant, but less tough and a little more brittle.At similar hardnesses, steels with greater amounts of carbides or carbides of a higher hardness, will show better resistance to wear. This factor accounts for differences in wear resistance among, say, O1, A2, D2, and M4. Ideally, tool steels would contain as much carbide volume as needed for the desired wear performance.A2 Tool Steel MATERIAL DATASHEET Typical Mechanical Properties Standard Markforged As-Sintered3 Markforged Heat-Treated1 Wrought Heat Treated 0.2% Compressive Yield Strength ASTM E9 up to 900 MPa 1170 MPa — Elastic Modulus ASTM E9 180 GPa 160 GPa 190 GPa Hardness ASTM E18 up to 50 HRC 50 …A2 Tool Steel. A2 Tool Steel is a versatile, air-hardening tool steel that is characterized by good toughness and excellent dimensional stability in heat treatment. A2 is intermediate …A2 Tool Steel. A2 tool steel is a 5% chromium medium alloy cold work tool steel possessing sufficient hardenability to be air hardened to 60 Rc surface hardness level with good depth of hardening. This widely used tool steel has low distortion in heat treatment, good machinability, good toughness for severe service, high abrasion resistance ...Virat Special Steels is the largest Supplier, Stockiest, Importer and Exporter of A2 Tool Steel in India, USA and Europe.A2 Tool Steel: A Detailed Look Composition and Properties. A2 tool steel is an air-hardening medium-alloy, cold-work tool steel. The composition includes high carbon and chromium, which offers a balance between hardness, dimensional stability, and mechanical toughness.Aug 5, 2023 · Properties. A2 Tool Steel and S7 are tool steels commonly used in manufacturing. A2 Tool Steel is an air-hardening steel that contains chromium, molybdenum, and vanadium. It has good wear resistance and toughness and is easy to machine. S7, on the other hand, is an oil-hardening steel that contains chromium, molybdenum, and silicon. A2 tool steel is an air hardening, cold work steel of group A steels containing molybdenum and chromium. A2 steel contains 5% of chromium steel which provides high hardness after heat treatment with good dimensional stability. The carbon content in A2 tool steels is high. A2 offers good toughness with medium wear resistance and is relatively ... The Composition of Steel D2: as per ASTM A681. D2 tooling steel is defined by its unique composition. It’s high in carbon and chromium content, with additional elements boosting its performance. Here’s what makes up D2 steel: Element. Percentage in D2 Steel. Carbon. 1.40-1.60%. Chromium.While the average value of a 1943 steel penny is 45 cents, they can be worth as much as $10, according to Coin Tracker. The condition of the steel penny, if uncirculated, is what c... In heat treatment, A2 Tool Steel Stock is known for its exceptional toughness and dimensional stability. Because of these properties, it is a versatile tool steel with outstanding performance and a low price. It is a medium-carbon, high-chromium tool steel that falls between oil-hardening and D2 high-carbon, high-chromium tool steel. It is a superior quality steel which has excellent wear and abrasion resistant properties. Air-True is furnished with a fully spheroidized structure and is 100% ...A2 tool steel is an air hardening, cold work steel. A2 is a 5% Chromium steel which provides high hardness after heat treatment with good dimensional stability. It is heat … Tool Steel Comparison Chart. Compare popular tool steel grades A2, M2, D2, S7, O1 using the chart below. Compare grades using mechanical properties including abrasion resistance, toughness, size stability, machinability and grindability. Supply quality metals at competitive prices, with unbeatable service to keep you PRODUCTIVE! A2 Tool Steel Hardness (before heat treating, raw material state) Thread starter FrankTartaglia; Start date Oct 9, 2019; Replies 2 Views 8,859 F. FrankTartaglia Plastic. Joined Apr 25, 2019 City Palm Harbor. Oct 9, 2019 #1 Hello All,***** Currently, the website is available for QUOTING ONLY. Please contact your inside sales representative to book orders. 1-800-289-2785 *****Double temper A2 Tool Steel part in a standard furnace. For each temper, heat part to 150-550°C2 (302-1022°F) and temper for 2 hours, or 1 hour per inch of thickness. If double tempering, let part cool to room temperature between tempers. A2 tool steel is a highly versatile air-hardening tool steel often regarded as a “universal” cold ...I did manage to find two data points for A2 in "Tool Steels", Roberts, Hamaker, Johnson. They give ultimate tensile strength (UTS) of 269,500 psi and 54HRC if tempered at 1000 F. And for tempering at 1100 F they give: 47HRC; UTS is 232,600 psi; yield strength is 184,000 psi; elongation is 5% and reduction of area …Tool Steel Bar/Tool Steel Round Bar. Tool steels are used to form, cut, shear and mold metals and other materials. Cold work tool steels (D2, D7, A2, O1, S7, S5) are used for roll forming, general tool and die applications, progressive dies, and mining. Hot work tool steels (H13, 2714) are sold into the aluminum extrusion die market, die cast ...Round and forged bars, blocks, flat bars in tool steel grade for cold work 1.2363, X100CrMoV5-1, Z100CDV5, AISI A2 acc. to ISO 4957.A2 vs O1 Steel, Brief Comparison. A2 steel is knows as air harden steel while O1 steel is oil harden steel. Here we briefly compare this two tool steel grades as follows. Both A2 steel and O1 steel are cold work tool steel grades in ASTM A681 standard. However, A2 tool steel belongs to A-Group, which have high hardenability …A2 tool steel: a versatile, air-hardening tool steel — good toughness and stability; D2 tool steel: wear resistant but not as tough as lower alloyed steels — very sensitive to heat treatment; O1 tool steel: cold work and …Driving tools include a variety of steel tools used to install, repair and maintain a variety of constructions. Drivers are used to drill, insert and drive screws, nuts and bolts i...The density of stainless steel is 8,000 kilograms per cubic meter. Density is calculated by dividing the mass of the material by the volume. There are five major types of steel: al...A2 tool steel is a 5% chromium steel with high hardness and non-deforming properties. Learn about its applications, heat treatment, hardness, and availabilit…AISI A2 Tool Steel is an air-hardening grade of steel that contains 5% chromium. A2 is noted for its good toughness and excellent dimensional stability in heat treatment. These characteristics make it a versatile tool steel that combines good performance and price. A2 Steel falls between oil-hardening and D2 high-carbon, high …A2 and D2 are cold work tool steels defined by their extremely high hardness after heat treatment. A2 tool steel is often regarded as a “universal” cold work steel, offering a combination of good wear resistance and high toughness. D2 tool steel is harder and more wear resistant, but less tough.1,150° - 1,400° F. @ 350°F typical hardness Rockwell “C” 62. @ 950°F typical hardness Rockwell “C” 48. At Southern Tool Steel, we are committed to being the best-in-class decarb free tool steel supplier. Our broad range of quality materials and services is available for distribution nationwide with no minimum order required.A2 Steel Bar Machinability · Good Cutting Tool Performance: It exhibits good chip control and a low cutting force requirement, allowing for efficient machining ...About the Material. A2 Tool Steel offers excellent wear resistance and toughness. Due to its high compressive strength and dimensional stability, this material is commonly used to make fixtures, tools, tool holders, gauges and punches. D2 Tool Steel is an air-hardening material, and it offers superior wear-resistance when compared to A2 Tool Steel.Markforged A2 Tool Steel is a cold work tool steel defined by its extremely high hardness after heat treatment. A2 tool steel is often regarded as a ...The Composition of Steel D2: as per ASTM A681. D2 tooling steel is defined by its unique composition. It’s high in carbon and chromium content, with additional elements boosting its performance. Here’s what makes up D2 steel: Element. Percentage in D2 Steel. Carbon. 1.40-1.60%. Chromium.A2 Tool Steel is a versatile, air hardening chromium alloy tool steel that replaces O1 tool steel when safer hardening, less distortion and increased wear resistance are required. AISI type A2 steel is intermediate in wear … In heat treatment, A2 Tool Steel Stock is known for its exceptional toughness and dimensional stability. Because of these properties, it is a versatile tool steel with outstanding performance and a low price. It is a medium-carbon, high-chromium tool steel that falls between oil-hardening and D2 high-carbon, high-chromium tool steel. A2 Tool Steel can be heat-treated to increase hardness and durability. Markforged recommends heat-treating A2 Tool Steel to opti-mize material properties for target applications. 1. Heat A2 Tool Steel part in a standard (non vacuum) furnace to 970°C (1780°F) . Hold part at temperature for 30-45 minutes. 2. Air quench part to below 65°C (150 ... A2 is an air quenched tool steel that is highly regarded in the knife industry for its toughness and ability to hold a cutting edge. The fact that it can be quenched in air is a bonus. Part Number: Steel Type: Dimensions (Imperial) Dimensions (Metric) A2-125-1.5-36: A2: 0.125 x 1.5 x 36: 3.2 x 38 x 900 mm:Here are some tips on how to weld A2 tool steel. Cut the A2 tool steel to the desired shape and size. Clean the surface of the A2 tool steel with a wire brush or grinding wheel. Set up your welding equipment according to the manufacturer’s instructions. Strike an arc on the A2 tool steel and begin welding.AISI A2 Tool Steel is an air-hardening grade of steel that contains 5% chromium. A2 is noted for its good toughness and excellent dimensional stability in heat treatment. These characteristics make it a versatile tool steel that combines good performance and price. A2 Steel falls between oil-hardening and D2 high-carbon, high …A2 steel is air-hardening steel produced by crucible industries. The A in the name is the designation for air hardening. Knifemakers love this tool steel because it is easy to work with and has high toughness and moderate wear resistance. These features make it an ideal choice for making survival, combat, camping, and hunting knives.A2 tool steel is a 5% chromium steel with high hardness and non-deforming properties. Learn about its applications, heat treatment, hardness, and availabilit…May 3, 2023 · But, D2 offers slightly better hardness than A2. So, definitely, D2 won the first round over A2 Steel. According to the Rockwell Report, A2 has a hardness of 57-62 HRC, whereas D2 offers 52-62 HRC. 2. Toughness. The harder the steel, the less tough it is! That means A2 is tougher steel than D2. Tool steel. Tool steel is any of various carbon steels and alloy steels that are particularly well-suited to be made into tools and tooling, including cutting tools, dies, hand tools, knives, and others. Their suitability comes from their distinctive hardness, resistance to abrasion and deformation, and their ability to hold a cutting edge at ... See Also A2 tool steel, 01 Tool steel, and 69S. D2 Supreme™ If you are looking for a Die and Mold steel with superior properties to D2, we recommend D2 Supreme™. Steel Express has introduced D2 Supreme™ to meet the demand in the UK market for DC53® equivalent mold and die steel. D2 Supreme™ is a cold work die and mold steel. Virat Special Steels is the largest Supplier, Stockiest, Importer and Exporter of A2 Tool Steel in India, USA and Europe. AISI A2 Tool Steel is one of ‘A’ group cold works steel in ASTM A681 standard. A2 Tool Steel is a versatile, air hardening chromium alloy tool steel that replaces O1 tool steel when safer hardening, less distortion and increased wear resistance are required. AISI type A2 steel is intermediate in wear resistance between O1 oil-hardening tool ...
DATA SHEET. Airkool (AISI A2) is an air-hardening medium alloy tool steel which is heat treatable to HRC 60-62. It has wear resistance intermediate between the oil hardening tool steels (O1) and the high carbon chromium tool steels (D2). Because it offers a combination of good toughness along with moderate wear resistance, it …. Arby's 5 for 5
A2 tool steel is more wear resistant than O1 and it keeps a sharper cutting edge. This air-hardening material is widely used for punches, broaches, and dies. These rods and discs are decarb-free for a uniform surface that …Creating Steel - Creating steel involves removing the impurities from iron. If you succeed in creating steel, the result is a material that's even stronger than iron. Advertisement...Hardened SAE-AISI A2 is SAE-AISI A2 steel in the hardened (H) condition. The graph bars on the material properties cards below compare hardened SAE-AISI A2 to: tool steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set.SAE-AISI A2 steel is a tool steel. A2 is the designation in both the SAE and AISI systems for this material. T30102 is the UNS number. The properties of SAE-AISI A2 steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below.Aug 4, 2023 · A2 Tool Steel is best suited for cutting, shaping, and forming hard materials, while A2 Stainless Steel is suitable for use in environments requiring high corrosion resistance. When choosing between the two, it’s important to consider the specific requirements of your project, including environmental conditions, budget, and intended use. Please select the diameter of A2 Tool Steel Round you would like to purchase and from there you can select the available lengths. Round Bar Tolerance - Clean ...A2 tool steel can be heat-treated to increase hardness and durability. Markforged recommends heat-treating A2 tool steel to optimize material properties, though it can be used as-sintered. 1. Heat A2 Tool Steel part in a standard (non vacuum) furnace to 970°C (1780°F) . Hold part at temperature for 30-45 minutes. 2.A2 is an air-hardening medium alloy tool steel which is heat treatable to HRC 60-62. It has wear resistance intermediate between the oil hardening tool steels (O1) and the high carbon chromium tool steels (D2). Because it offers a combination of good toughness along with moderate wear resistance, it has been widely used for many years in variety …DATA SHEET. Airkool (AISI A2) is an air-hardening medium alloy tool steel which is heat treatable to HRC 60-62. It has wear resistance intermediate between the oil hardening tool steels (O1) and the high carbon chromium tool steels (D2). Because it offers a combination of good toughness along with moderate wear resistance, it …The A2 is somewhat difficult to sharpen, but then the M2 is worse. At least the A2 offers some decent corrosion-resistance, unlike the M2. M2 steel vs D2. When it comes to tool steels used for knives, the D2 is perhaps the most popular. It’s been used in knives since WWII, and it’s still popular today. The D2 offers good edge …The physical properties of die steel D2 are largely determined by its composition, which includes a significant amount of carbon (1.4%), silicon (0.6%), chromium (12%), and molybdenum (0.7%). Because of this composition, die steel D2 has excellent wear resistance, which makes it ideal for use in applications where wear occurs …A2 tool steel can be used for a variety of applications, including automotive and aerospace parts, as well as knives and other cutting tools. Welding Tool Steel . Welding is a process of joining two pieces of metal together by melting them and using a filler material to form a strong bond. Welding is often used to repair metal objects or to ...Aug 5, 2023 · A2 Tool Steel is a high-carbon, air-hardened tool steel known for its superior wear and abrasion resistance. It boasts strong tensile strength, excellent toughness, and good machinability. Its versatility makes it ideal for various applications, including dies, punches, cutting tools, stamping presses and injection moulds. There are many grades of steel wool on the market today. Check out this helpful article for details on the various uses for steel wool. Advertisement Advertisement Please copy/past...Aug 4, 2023 · A2 Tool Steel is best suited for cutting, shaping, and forming hard materials, while A2 Stainless Steel is suitable for use in environments requiring high corrosion resistance. When choosing between the two, it’s important to consider the specific requirements of your project, including environmental conditions, budget, and intended use. M-2 is a high temperature steel made for lath cutting tools, which has darn little to do with knives, but allows you to really cook the blade in finishing after heat treat without annealing it. M-2 is perhaps a bit better in edge holding than D-2. It is also rather brittle and not recommended for large knives.Annealed SAE-AISI A2 is SAE-AISI A2 steel in the annealed condition. The graph bars on the material properties cards below compare annealed SAE-AISI A2 to: tool steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest ...We will be adding technical papers covering tool steel applications, heat treating, selection of steels, grinding and machining data, and other helpful information. Click on the grade of steel you're interested in to bring up a data sheet with technical information. *CPM, 1V, 3V, 9V, 10V, 15V, S30V, S90V, Rex M4, Rex T15, and …Please select the diameter of A2 Tool Steel Round you would like to purchase and from there you can select the available lengths. Round Bar Tolerance - Clean ...Steel A2 is a Tool Steel (High-alloy steel) that has on top of the 1% of carbon an additional 7.9% of manganese, chromium, nickel, and molybdenum. (See details in the below table ). Steel A2 has a machinability rating of 42%. Steel A2 belongs to the "A series" of tool steels. They are classified as air-hardening, cold-work steel and contain ...Tempering: Heat the hardened steel to 150-300°C (302-572°F) and hold for 1-2 hours, then cool in air. This process is used to reduce the steel’s brittleness and improve its toughness. AISI D2 tool steel is a high-carbon, high-chromium tool steel that has excellent wear resistance, toughness, and dimensional stability..