Crucible Steel Flange,AIRKOOL® (AISI A2) Tool Steel Flange

1,We Manufacturing processes are primarily classified into four types: 1:Forging, 2:Casting, 3:Cutting, 4:Rolling. 2,We can manufacture in accordance with these standards. Standards: GB Series (Chinese Standards), JB Series (Machinery Standards), HG Series (Chemical Industry Standards), ASME B16.5 (American Standards), BS4504 (British Standards), DIN (German Standards), and JIS (Japanese Standards). Internationally, there are two primary systems of pipe flange standards: the European system, represented by the German DIN standards (including those of the former Soviet Union), and the American system, represented by the US ANSI pipe flange standards. Other common standards include: the Chinese Ministry of Machinery Industry standards (JB series), the Ministry of Chemical Industry standards (HG series), the Chinese National Standard *GB/T 9112–9124-2010 Steel Pipe Flanges*, as well as US standards (ASME B16.5), British standards (BS4504), German standards (DIN), Japanese standards (JIS), and marine standards (CBM), among others. The nominal pressure ratings for the PN series are designated by "PN" and comprise the following nine levels: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The nominal pressure ratings for the Class series are designated by "Class" and comprise the following six levels: Class150, Class300, Class600, Class900, Class1500, and Class2500. Flange Classification 1. **According to Chemical Industry Standards:** Flanges are classified as follows: Plate Flat Welding Flange (PL), Necked Flat Welding Flange (SO), Necked Butt Welding Flange (WN), Integral Flange (IF), Socket Welding Flange (SW), Threaded Flange (Th), Butt Welding Ring Loose Flange (PJ/SE), Blind Flange (BL), Flat Welding Ring Loose Flange (PJ/PJ), and Lined Blind Flange (BL(s)). 2. **According to Petrochemical (SH) Industry Standards:** Flanges are classified as follows: Threaded Flange (PL), Butt Welding Flange (WN), Flat Welding Flange (SO), Socket Welding Flange (SW), Loose Flange (LJ), and Blind Flange (no specific designation). 3. **According to Machinery (JB) Industry Standards:** Flanges are classified as follows: Integral Flange, Butt Welding Flange, Plate Flat Welding Flange, Butt Welding Ring Plate Loose Flange, Flat Welding Ring Plate Loose Flange, Lap Joint Ring Plate Loose Flange, and Blind Flange. 4. **According to Connection Method/Type:** Flanges are classified as follows: Plate Flat Welding Flange, Necked Flat Welding Flange, Necked Butt Welding Flange, Socket Welding Flange, Threaded Flange, Blind Flange, Necked Butt Welding Ring Loose Flange, Flat Welding Ring Loose Flange, Ring-Type Joint (RTJ) Flange and Blind Flange, Large-Diameter Plate Flange, Large-Diameter High-Neck Flange, Figure-8 Blind Plate, Butt Welding Ring Loose Flange, etc. 5. **According to the Component Being Connected:** Flanges can be classified into Vessel Flanges and Pipe Flanges. 6. **According to Structural Type:** Flanges include Integral Flanges, Threaded Flanges, Flat Welding Flanges, Butt Welding Flanges, Lap Joint (Loose/Swivel) Flanges, and Blind Flanges. A flange—also referred to as a flange plate or rim—is a component used to connect shafts to one another, or, more commonly, to join the ends of pipes. Flanges are also utilized at the inlet and outlet ports of equipment to facilitate connections between two devices—for instance, the flange on a speed reducer. A "flange connection" or "flanged joint" refers to a detachable joint assembly comprising three interconnected elements—a flange, a gasket, and bolts—that together form a sealed structural unit. In the context of piping systems, a "pipe flange" specifically denotes a flange used for plumbing within the installation; when applied to equipment, it refers to the inlet or outlet flange of that specific device. Flanges feature a series of holes through which bolts are inserted to securely fasten the two flanges together, while a gasket placed between the flanges ensures a leak-proof seal. Flanges are broadly categorized into three types: threaded (screw-in) flanges, welded flanges, and clamp-type flanges. Flanges are invariably used in pairs; threaded flanges are suitable for low-pressure piping applications, whereas welded flanges are required for systems operating at pressures exceeding 4 kilograms per square centimeter. A sealing gasket is inserted between the two flange plates, which are then firmly secured using bolts. The thickness of a flange—as well as the specifications of the bolts used to fasten it—vary depending on the specific pressure rating required for the application. When connecting equipment such as water pumps or valves to piping systems, the corresponding connection points on these devices are often manufactured in the shape of a matching flange; this method of attachment is also referred to as a "flange connection." Generally, any connecting component that utilizes bolts to join and seal the perimeters of two flat surfaces—such as the joints in ventilation ducts—is termed a "flange"; such components may collectively be classified as "flange-type parts." However, since such a connection often constitutes merely a *portion* of a larger device—for instance, the interface between a flange and a water pump—it would be inappropriate to classify the entire water pump itself as a "flange-type part." Conversely, smaller components—such as valves—that feature such flanged interfaces may indeed be appropriately categorized as "flange-type parts." -:- For detailed product information, please contact sales. -: Crucible Steel Flange AIRKOOL® (AISI A2) Tool Steel Flange Product Information -:- For detailed product information, please contact sales. -: Crucible Steel Flange AIRKOOL® (AISI A2) Tool Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

Crucible Steel AIRKOOL® (AISI A2) Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Introduction: Crucible AIRKOOL® (AISI A2) Tool Steel** Crucible AIRKOOL® is a premium, medium-alloy, air-hardening cold work tool steel that conforms to the widely adopted AISI A2 specification. Renowned for its **excellent balance of wear resistance, toughness, and dimensional stability**, AIRKOOL® embodies the ideal properties for a versatile tool steel capable of handling a broad range of demanding applications. Its name directly reflects its primary advantage: **excellent air-hardening characteristics ("AIR") coupled with good resistance to softening during use ("KOOL")**, minimizing distortion and quench-cracking risks associated with oil-hardening grades. Formulated with a balanced chromium-carbon-molybdenum composition, AIRKOOL® provides superior performance compared to oil-hardening O-series steels (like O1) in terms of wear life and stability, while offering better toughness and machinability than higher-alloy, higher-wear steels like D2. It is the quintessential "all-rounder" tool steel, trusted for precision tooling that requires a reliable combination of durability, stability, and ease of heat treatment. --- ## **1. Chemical Composition (Weight %)** The composition adheres to the AISI A2 standard, optimized for air hardenability and a balanced carbide structure. | **Element** | **Carbon (C)** | **Chromium (Cr)** | **Molybdenum (Mo)** | **Vanadium (V)** | **Manganese (Mn)** | **Silicon (Si)** | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Content** | 0.95 - 1.05 | 4.75 - 5.50 | 0.90 - 1.10 | 0.15 - 0.30 | 0.40 - 0.70 | 0.15 - 0.30 | | **Role** | Provides base hardness and forms chromium carbides for wear resistance. Level is optimized for toughness-wear balance. | Primary alloy for deep air hardenability. Forms hard (Cr₇C₃) carbides, contributing significantly to wear resistance. | Enhances hardenability, refines grain structure, improves toughness, and increases resistance to tempering. | Refines grain size, improves toughness and wear resistance by forming fine, hard vanadium carbides. | Aids in deoxidation and contributes to hardenability. | Acts as a deoxidizer during steelmaking; provides some solid solution strengthening. | *Note: Iron (Fe) constitutes the remainder. The resulting carbide volume (~5-7%) is lower than D2, contributing to better toughness.* --- ## **2. Physical & Mechanical Properties** *Typical properties after proper heat treatment to 58-62 HRC.* * **Density:** ~7.86 g/cm³ (0.284 lb/in³) * **Modulus of Elasticity:** ~210 GPa (30.5 x 10⁶ psi) * **Thermal Conductivity:** Approximately 26 W/m·K at 20°C. * **Coefficient of Thermal Expansion:** ~11.5 x 10⁻⁶/°C (20-200°C) * **Hardenability:** **Excellent.** Deep air-hardening characteristics; can fully harden in substantial cross-sections with minimal distortion. * **Hardness (Typical Working Range):** **57 - 62 HRC.** Most commonly and optimally used at **59-61 HRC**. * **Wear Resistance:** **Good to Very Good.** Superior to oil-hardening grades (O1) due to higher alloy content and carbide volume, but less than high-chromium steels like D2. Excellent for many stamping and forming applications. * **Toughness:** **Very Good.** A key strength of A2. It offers significantly higher impact toughness than D2, making it more resistant to chipping and cracking in applications with moderate shock or intermittent loading. * **Dimensional Stability:** **Excellent.** Air hardening results in minimal size change and distortion, making it ideal for precision tools, gauges, and complex shapes. * **Machinability (Annealed):** **Good.** Better than higher-alloy tool steels like D2, reducing manufacturing time and cost. --- ## **3. Heat Treatment** * **Annealing:** Heat to 845-870°C (1555-1600°F), slow cool in furnace at ≤15°C/hr to 600°C, then air cool. Annealed hardness: 200-235 HB. * **Stress Relieving:** 650-675°C (1200-1250°F), hold, then slow cool. * **Preheating:** **Highly Recommended.** Preheat at 730-790°C (1350-1450°F) to minimize thermal shock and distortion. * **Austenitizing:** **925-980°C (1700-1795°F).** A common and effective temperature is **955-970°C (1750-1780°F)**. * **Quenching:** **Air quench** in still or forced air. For optimal dimensional stability on complex parts, a interrupted air quench to ~540°C (1000°F) followed by still air cooling is highly effective. **Do not oil quench.** * **Tempering:** **Mandatory.** Temper immediately after quenching. **Two tempers**, each for 2+ hours, are recommended for stability. * **Typical Tempering Range:** **205-540°C (400-1000°F).** * For a hardness of 59-61 HRC: Temper at **425-540°C (800-1000°F)**. * **Avoid prolonged tempering in the 260-375°C (500-700°F) range** due to potential temper embrittlement. --- ## **4. Key Applications** AIRKOOL® (A2) is an extremely versatile steel used across countless precision tooling applications. * **Precision Blanking & Forming Dies:** Punches, dies, and stripper plates for medium to long-run stamping of metals. * **Master Hubs, Form Rolls, & Mandrels:** Tools for cold forming shapes, threads (roll forming), and tubing. * **Gages & Measuring Tools:** Thread plugs, ring gages, and fixtures requiring dimensional stability and wear resistance. * **Shear & Slitter Knives:** Blades for cutting metal, paper, and plastics. * **Industrial Knives & Cutting Tools:** Woodworking knives, plastic granulator blades, and cutting inserts. * **Molds & Tooling for Plastics & Rubber:** Cavities, cores, and ejector pins requiring polishability and wear resistance. * **Machine Components:** Cams, wear plates, and guides. --- ## **5. International Standards & Cross-References** Crucible AIRKOOL® is the brand name for Crucible's AISI A2 grade. * **AISI/SAE:** **A2** * **UNS:** T30102 * **European (EN):** **1.2363** (X100CrMoV5-1-1) * **Japanese (JIS):** **SKD12** * **ISO:** HS 6-5-2 (approximate classification) * **Common Trade Names:** A2 Tool Steel, Air-Hardening A2. --- ## **6. Advantages & Limitations** **Advantages:** * **Superb Balance of Toughness & Wear Resistance:** Its most celebrated attribute, making it a reliable, general-purpose choice. * **Exceptional Dimensional Stability:** Minimal distortion simplifies the manufacture of complex, precision tools. * **Good Machinability & Grindability:** Easier and more cost-effective to machine and finish than many other tool steels. * **Deep, Reliable Air Hardenability:** Simplifies heat treatment and reduces risk of quench cracks. * **Proven Versatility:** A trusted, well-understood material suitable for a vast array of tooling challenges. **Limitations:** * **Not Stainless:** Will corrode if not protected; corrosion resistance is only slightly better than carbon steels. * **Lower Wear Resistance than D2/High-Alloy Steels:** Not the best choice for extremely abrasive, high-volume applications. * **Limited Hot Hardness:** Not designed for high-temperature service; begins to soften significantly above ~425°C (800°F). --- ## **7. Summary** **Crucible AIRKOOL® (AISI A2) is the definitive balanced-performance, air-hardening tool steel, offering an unmatched combination of practicality, reliability, and versatility.** For tool designers and manufacturers who need a material that performs predictably across a wide spectrum of cold work applications—from precision gauges to robust forming dies—AIRKOOL® provides an optimal solution. It mitigates the risks of distortion and cracking while delivering a long service life through its excellent blend of wear resistance and toughness, solidifying its status as an industry staple for high-quality tooling. -:- For detailed product information, please contact sales. -: Crucible Steel AIRKOOL® (AISI A2) Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6964 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: Crucible Steel AIRKOOL® (AISI A2) Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Crucible Steel Flange AIRKOOL® (AISI A2) Tool Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Crucible Steel Flange AIRKOOL® (AISI A2) Tool Steel Flange -:- For detailed product information, please contact sales. -:

Packing of Crucible Steel Flange AIRKOOL® (AISI A2) Tool Steel Flange -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Flange drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3435 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition