Crucible Steel Flange,AIRDI® 150 (AISI D2) 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 AIRDI® 150 (AISI D2) Tool Steel Flange Product Information -:- For detailed product information, please contact sales. -: Crucible Steel Flange AIRDI® 150 (AISI D2) Tool Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

Crucible Steel AIRDI® 150 (AISI D2) Tool Steel Product Information -:- For detailed product information, please contact sales. -: # **Technical Datasheet: Crucible Steel AIRDI® 150 (AISI D2) Tool Steel** --- ## **1. Product Overview** **Crucible AIRDI® 150** is a premium-grade, **air-hardening, high-carbon, high-chromium cold work tool steel** produced by Crucible Industries as their proprietary formulation of the standard **AISI D2** composition. The "AIRDI" designation explicitly emphasizes its air-hardening characteristic ("AIR") and its position within the D-series ("DI") of cold work steels, while "150" references its specific grade within Crucible's product lineup. This steel is engineered to provide **exceptional wear resistance, good dimensional stability, and deep hardenability** for demanding cold work applications where tool longevity is paramount. AIRDI® 150 delivers the classic D2 performance profile – characterized by a high volume of hard chromium carbides for outstanding abrasion resistance – while benefiting from Crucible's controlled manufacturing processes for enhanced consistency and reliability. Its air-hardening nature minimizes distortion and quenching stresses compared to oil-hardening steels, making it suitable for precision tooling applications. --- ## **2. Key International Standards & Designations** | Country/System | Standard Designation | Equivalent/Specification | | :--- | :--- | :--- | | **USA (Crucible)** | **AIRDI® 150** | Proprietary D2-grade Tool Steel | | **USA (AISI/SAE)** | **AISI D2** | UNS T30402 | | **USA (ASTM)** | **ASTM A681** | Grade D2 | | **ISO** | **ISO 4957:2018** | **1.2379** / X153CrMoV12 | | **Europe (EN)** | **EN ISO 4957:2018** | **1.2379** / X153CrMoV12-1 | | **Germany (DIN/W-Nr.)** | **1.2379** | X155CrVMo12-1 | | **Japan (JIS)** | **JIS G4404** | **SKD11** | | **Common Names** | High Carbon High Chrome, Air-Hardening Wear Steel | - | **Note:** While AIRDI® 150 is Crucible's proprietary brand name, it conforms to the chemical and mechanical requirements of AISI D2 standards, with potential enhancements in consistency and microstructure from Crucible's manufacturing controls. --- ## **3. Chemical Composition (Typical %)** The composition adheres to the classic D2 formulation, optimized for maximum carbide formation and air hardenability. | Element | Weight % (Typical Range) | Metallurgical Function | | :--- | :--- | :--- | | **Carbon (C)** | 1.50 - 1.60 | Primary hardening element; ensures high matrix hardness and provides carbon for chromium carbide formation. | | **Chromium (Cr)** | 11.00 - 12.00 | **Primary carbide former.** Creates a high volume (~12-16%) of hard **chromium carbides (M₇C₃ type)** for exceptional wear resistance. Also provides hardenability and moderate corrosion resistance. | | **Molybdenum (Mo)** | 0.70 - 1.00 | **Critical for air hardenability.** Enhances hardenability significantly, allowing full hardening in still air. Also improves toughness and contributes to secondary hardening. | | **Vanadium (V)** | 0.90 - 1.10 | Forms hard, fine **vanadium carbides (MC type)** for additional wear resistance and, crucially, **inhibits grain growth** during austenitizing. | | **Silicon (Si)** | 0.15 - 0.40 | Deoxidizer and solid solution strengthener. | | **Manganese (Mn)** | 0.30 - 0.50 | Aids in deoxidation and hardenability. | | **Other (P, S)** | < 0.025 | Impurities kept at minimal levels. | **Crucible's Manufacturing Advantage:** - **Consistent Chemistry:** Tight compositional control ensures predictable heat treatment response. - **Uniform Microstructure:** Aimed at providing consistent carbide distribution for reliable performance. - **Improved Purity:** Lower non-metallic inclusion counts compared to generic D2. --- ## **4. Physical & Mechanical Properties** ### **4.1 Standard Heat Treatment (AIRDI® 150)** * **Annealing:** Heat to 850-870°C (1560-1600°F), slow furnace cool to 600°C (1110°F), then air cool. Annealed hardness: **~210-240 HB**. * **Preheating:** Recommended at 650°C (1200°F) and 850°C (1560°F) to reduce thermal gradient. * **Austenitizing:** **980-1020°C (1795-1870°F).** Typical temperature: **995-1010°C (1825-1850°F).** Soak time: 20-40 minutes per inch. Protective atmosphere recommended. * **Quenching:** **Still or forced air.** This is the core advantage—air cooling to full hardness with minimal distortion. * **Tempering:** **Must begin promptly. Double tempering is strongly recommended.** * **For Maximum Wear:** Temper at 180-250°C (355-480°F) → **60-62 HRC** * **For General Purpose:** Temper at 450-520°C (840-970°F) → **56-59 HRC** (optimal balance) * **Expected As-Quenched Hardness:** ~62-64 HRC. ### **4.2 Mechanical Properties (Hardened & Double Tempered @ 500°C)** | Property | Value / Rating (Typical) | Performance Notes | | :--- | :--- | :--- | | **Hardness** | **57 - 60 HRC** (common working range) | Can be tempered from 54 to 62+ HRC. | | **Abrasive Wear Resistance** | **Outstanding / Best-in-Class (Conventional Cold Work)** | Benchmark for wear resistance among standard cold work tool steels. | | **Compressive Strength** | ~ 2600 - 3000 MPa | Extremely high, suitable for heavy forming. | | **Impact Toughness (Charpy)** | **Low to Moderate (10-20 J)** | The trade-off for high wear resistance. Better than oil-hardening D3, but lower than A2. | | **Dimensional Stability** | **Excellent** | Air quenching minimizes distortion and size change. | | **Deep Hardenability** | Excellent | Can fully air-harden large sections (up to 300-400mm/12-16" diameter). | ### **4.3 Physical Properties (Approximate)** * Density: 7.70 g/cm³ * Thermal Conductivity: ~20 W/m·K (Low) * Coefficient of Thermal Expansion: 10.4 x 10⁻⁶/K (20-100°C) * Modulus of Elasticity: 210 GPa --- ## **5. Typical Product Applications** AIRDI® 150 is specified for **long-run, high-precision tooling subject to severe abrasive wear**. * **Blanking and Punching Dies:** For abrasive materials: **stainless steel, pre-coated metals, silicon steel, composites, fiber-reinforced plastics.** * **Cold Forming Tools, Rolls, and Knurling Dies.** * **Thread Rolling Dies** for high-strength or abrasive workpieces. * **Shear Blades, Slitter Knives, and Rotary Cutters** for metals. * **Powder Compaction Dies** and precision gauges. * **Plastic Injection Molds** for abrasive filled plastics (glass-filled, mineral-filled). * **Wear Parts:** Guides, liners, and rolls in high-abrasion environments. --- ## **6. Processing & Manufacturing Guidelines** * **Machinability (Annealed ~225 HB):** **Poor.** Rated approximately **30-35%** of 1% carbon steel. Hard carbides are abrasive to cutting tools. Use rigid setups, positive rake carbide tooling, and moderate parameters. * **Grindability:** **Fair to Poor.** The hard carbides wear wheels. Use softer-grade aluminum oxide wheels with light passes and ample coolant. CBN wheels offer superior performance. * **EDM Machining:** Excellent and commonly used. A **low-temperature stress relief temper (150-200°C) after EDM is recommended** to remove the brittle white layer. * **Welding:** **Not recommended for tooling applications.** If repair is unavoidable, use specialized procedures with high preheat and post-weld heat treatment. * **Polishing:** **Very Good to Excellent.** The fine carbide structure allows for excellent surface finishes, important for plastic molds and precision tools. --- ## **7. Comparative Performance & Selection Notes** | Criterion | **AIRDI® 150 (D2)** | **AISI A2** | **AISI D3 (Oil-Hardening)** | **CPM D2 (PM)** | | :--- | :--- | :--- | :--- | :--- | | **Wear Resistance** | **Best (Conventional)** | Very Good | Slightly Better* | **Better** | | **Toughness** | Fair | **Best** | Poorest | **Better** | | **Dimensional Stability** | **Excellent** | **Excellent** | Fair | **Excellent** | | **Distortion Risk** | Low | Low | High | Low | | **Grindability** | Fair | Good | Poor | Good | | **Cost** | Moderate | Moderate | Low | High | *\*D3 may have marginally better pure abrasion resistance in some cases due to higher carbon, but D2 offers better overall reliability and toughness.* **Why Choose Crucible AIRDI® 150?** 1. You require **maximum wear resistance** in a precision tool that must maintain dimensional accuracy. 2. The application involves **complex geometries** that would distort or crack with an oil quench. 3. You value the **consistency and quality assurance** of the Crucible brand for predictable performance. 4. **Cost-effectiveness** is important, but not at the expense of reliable wear performance (positioned between generic D2 and premium PM grades). **When to Consider Alternatives:** * **For applications with significant shock:** Choose **A2 or S7** for better toughness. * **For maximum possible wear + toughness:** Choose a **PM version of D2** (like CPM D2). * **For simple, cost-driven tools:** Choose **O1**. --- ## **8. Conclusion** **Crucible AIRDI® 150 (AISI D2) represents a reliable, high-performance implementation of the industry-standard air-hardening wear steel.** It delivers the **proven abrasion resistance of D2** combined with the **practical benefits of air hardening** – low distortion, excellent dimensional stability, and reduced processing risk. As a branded product from a major steel producer, AIRDI® 150 offers: - **Consistent quality** and predictable heat treatment response. - **The classic D2 performance profile** trusted for decades in demanding tooling applications. - **A balanced solution** for applications requiring extreme wear resistance in precision tools. For tool designers and manufacturers seeking a **dependable, high-wear material for long-run production tooling** – particularly in blanking, forming, and mold applications – **Crucible AIRDI® 150 provides a proven, cost-effective solution that balances performance, manufacturability, and reliability.** --- -:- For detailed product information, please contact sales. -: Crucible Steel AIRDI® 150 (AISI D2) Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5240 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 AIRDI® 150 (AISI D2) Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Crucible Steel Flange AIRDI® 150 (AISI D2) Tool Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Crucible Steel Flange AIRDI® 150 (AISI D2) Tool Steel Flange -:- For detailed product information, please contact sales. -:

Packing of Crucible Steel Flange AIRDI® 150 (AISI D2) 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 1711 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