Crucible Steel Flange,CPM® Rex® 20® (HS) High Speed 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 CPM® Rex® 20® (HS) High Speed Steel Flange Product Information -:- For detailed product information, please contact sales. -: Crucible Steel Flange CPM® Rex® 20® (HS) High Speed Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

Crucible Steel CPM® Rex® 20® (HS) High Speed Steel Product Information -:- For detailed product information, please contact sales. -: # **Technical Datasheet: Crucible Steel CPM® Rex® 20® (HS) High Speed Steel** --- ## **1. Product Overview** **Crucible CPM® Rex® 20®** is an ultra-premium, **powder metallurgy (PM), cobalt-bearing high-speed steel (HSS)** developed to deliver **exceptional hot hardness and cutting performance** under the most demanding high-temperature, high-speed machining conditions. The "Rex® 20®" designation signifies a specialized, high-cobalt variant designed to maximize **red-hardness**—the ability to retain hardness and cutting edge integrity at elevated temperatures. Manufactured via Crucible's proprietary CPM process, it features a highly refined, uniform microstructure free from the segregation and large carbides of conventional wrought cobalt HSS grades. This steel is engineered for **extreme productivity applications** where high cutting speeds and feeds generate substantial heat, causing standard HSS grades to soften and fail rapidly. It excels in machining heat-resistant superalloys, hardened steels, and other tough materials where thermal loading is the primary challenge. --- ## **2. Key International Standards & Designations** | Country/System | Standard Designation | Equivalent/Closest Specification | | :--- | :--- | :--- | | **USA (Crucible)** | **CPM® Rex® 20®** | Proprietary PM Cobalt HSS | | **USA (AISI/SAE)** | **- -** | Similar in spirit to M41/M42, but proprietary | | **USA (ASTM)** | **ASTM A600** | Custom PM Grade | | **ISO** | **ISO 4957:2018** | **HS7-6-3-10 / 1.3249** (Approximate) | | **Europe (EN)** | **EN ISO 4957** | **1.3249** (S 7-6-3-10) | | **Germany (DIN/W-Nr.)** | **1.3249** | S 7-6-3-10 | | **Japan (JIS)** | **- -** | Proprietary composition | | **Common Industry Names** | Super Cobalt HSS, High-Redness Steel | - | **Note:** CPM Rex 20 is a proprietary alloy. Its closest conventional analogues are **AISI M41** or **M42**, but its PM structure and optimized chemistry provide significantly enhanced performance, consistency, and grindability. --- ## **3. Chemical Composition (Typical %)** The composition is balanced with high cobalt and carbon to maximize hot hardness and tempering resistance, while maintaining adequate wear resistance and toughness. | Element | Weight % (Typical) | Metallurgical Function & Rationale | | :--- | :--- | :--- | | **Carbon (C)** | 1.30 - 1.45 | High carbon ensures a hard martensitic matrix and supports the formation of hard carbides. Critical for achieving high base hardness (≥67 HRC). | | **Tungsten (W)** | 6.00 - 7.00 | Primary contributor to **hot hardness (red-hardness)** through solid solution strengthening. Forms stable tungsten carbides. | | **Molybdenum (Mo)** | 3.00 - 4.00 | Enhances hardenability, refines grain structure, and contributes to secondary hardening. More efficient than tungsten on a weight basis. | | **Chromium (Cr)** | 3.50 - 4.50 | Provides hardenability and wear/corrosion resistance. Forms chromium carbides (M₇C₃). | | **Vanadium (V)** | 1.50 - 2.50 | Forms hard vanadium carbides (MC type) for wear resistance and grain refinement. Level is balanced to provide wear without excessively harming grindability. | | **Cobalt (Co)** | **8.00 - 10.00** | **The defining element.** Cobalt **does not form carbides**. It increases the matrix's **tempering resistance and hot hardness** by raising the dissolution temperature of other alloying elements' carbides during heating. This is the key to its red-hardness. | | **Silicon (Si), Manganese (Mn)** | < 0.50 | Standard deoxidizers and strengtheners. | **Key Microstructural Advantages of CPM Process:** - **Eliminates Cobalt Segregation:** In wrought cobalt steels, cobalt can segregate, causing soft spots. The PM process ensures perfect homogeneity. - **Refined Carbide Structure:** Fine, uniformly dispersed carbides improve toughness, grindability, and cutting edge stability compared to wrought equivalents like M42. - **Predictable Performance:** Isotropic properties ensure consistent behavior in all directions for complex tools like drills and end mills. --- ## **4. Physical & Mechanical Properties** ### **4.1 Standard Heat Treatment** * **Annealing:** Heat to 850-880°C (1560-1615°F), slow cool. Annealed hardness: **~260-280 HB**. * **Preheating:** **Mandatory.** Double preheat at 650°C (1200°F) and 850°C (1560°F) to prevent cracking. * **Austenitizing:** **1190-1220°C (2175-2230°F).** High temperature required to put sufficient carbon and alloys into solution. **Precise control (±5°C) is critical.** Vacuum or salt bath furnace required. * **Quenching:** **Oil, salt bath, or high-pressure gas quench.** * **Tempering:** **Triple or quadruple tempering is mandatory.** Temper at **540-570°C (1000-1060°F)** for 2+ hours each. **Cryogenic treatment** between quenching and first temper is highly recommended to maximize transformation of retained austenite. * **Expected Hardness:** **67-69 HRC** (can reach up to 70 HRC with optimal treatment). ### **4.2 Mechanical Properties (Hardened & Triple Tempered)** | Property | Value / Rating (Typical) | Performance Context | | :--- | :--- | :--- | | **Hardness** | **67 - 69 HRC** | **Extremely high** base hardness, enabling very sharp, durable cutting edges. | | **Hot Hardness (Red-Hardness)** | **Exceptional** | **Primary advantage.** Retains ~62-64 HRC at 600°C (1112°F), significantly outperforming non-cobalt HSS. | | **Abrasive Wear Resistance** | **Very Good** | Good due to high hardness and vanadium carbides, though not its *primary* feature (that is hot hardness). | | **Transverse Rupture Strength (TRS)** | **2,800 - 3,400 MPa** | Moderate for HSS. Cobalt increases hardness but can reduce toughness. The PM structure helps optimize this balance. | | **Impact Toughness** | **Fair** | Lower than M2/M4 types due to high cobalt and carbon. Requires robust tool geometries. | | **Grindability** | **Fair to Good (for Cobalt HSS)** | **Significantly better than wrought cobalt HSS** (e.g., M42) due to fine, uniform carbides. CBN grinding is most effective. | | **Tempering/Softening Resistance** | **Outstanding** | The high cobalt content provides exceptional resistance to overtempering during use or during multiple regrinds. | ### **4.3 Physical Properties (Approximate)** * Density: ~8.30 g/cm³ * Thermal Conductivity: ~25 W/m·K (Slightly higher than standard HSS due to Co) * Coefficient of Thermal Expansion: 11.5 x 10⁻⁶/K * Modulus of Elasticity: 220-225 GPa --- ## **5. Typical Product Applications** CPM Rex 20 is specified for **high-speed, high-feed, and dry machining operations** where heat generation is intense and tool softening is the failure mode. * **High-Performance Cutting Tools:** * **Drills & End Mills:** For **dry or high-speed machining of heat-resistant superalloys (Inconel, Hastelloy, Waspaloy), titanium alloys, and hardened steels (45-55 HRC).** * **Gear Hobs & Shaper Cutters:** For high-speed gear production, especially in tough materials. * **Broaches & Reamers:** For precision holes in high-temperature alloys. * **Inserts & Tool Bits:** For turning applications where high cutting speeds are used. * **Specialized Wear Parts:** Requiring high hardness and thermal stability in non-impact, elevated-temperature environments. --- ## **6. Processing & Manufacturing Guidelines** * **Machinability (Annealed):** **Very Poor.** The combination of high hardness in the annealed state and hard carbides makes machining difficult. Requires **CBN or premium carbide tooling**, low speeds, and high rigidity. * **Grindability:** **Fair to Good.** **CBN wheels are strongly recommended** for all finishing operations. The fine PM structure makes grinding more efficient and consistent than with wrought cobalt steels. Use ample coolant. * **EDM Machining:** Excellent and commonly used for complex shapes. Provides good accuracy and surface finish. A post-EDM low-temperature stress relief is advised. * **Surface Treatments/Coatings:** An excellent substrate for advanced **PVD coatings (AlTiN, AlCrN)**. The extreme base hardness and thermal stability allow these coatings to perform optimally under high heat. --- ## **7. Comparative Performance & Selection Notes** | Criterion | **CPM Rex 20** | **CPM M4** | **Wrought M42** | **Cemented Carbide** | | :--- | :--- | :--- | :--- | :--- | | **Hot Hardness (600°C)** | **Best (HSS)** | Excellent | Very Good | **Superior** | | **Room Temp Hardness** | **67-69 HRC** | 64-66 HRC | 66-68 HRC | 88-92 HRA | | **Wear Resistance** | Very Good | **Excellent** | Good | **Best** | | **Toughness** | Fair | **Good** | Poor | **Very Poor** | | **Optimal Cutting Speed** | **High (HSS)** | Moderate-High | High | **Very High** | | **Key Strength** | **Heat Resistance in Cutting** | **Abrasion Resistance** | Hot Hardness (but brittle) | **Speed & Wear** | **When to Choose CPM Rex 20:** 1. **High cutting speeds and feeds** generate excessive heat, causing other HSS tools to soften and fail rapidly. 2. Machining **high-temperature alloys (Ni/Co-based superalloys)** is the primary application. 3. **Dry machining or minimal coolant** strategies are employed, leading to high tool-tip temperatures. 4. You need the **maximum possible hot hardness from a HSS** to bridge the gap between standard HSS and carbide. **Limitations:** - **Lower toughness** than M2/M4 HSS; requires careful tool design. - **High cost** due to cobalt content and PM processing. - **Complex heat treatment** requires precise furnace capability. --- ## **8. Conclusion** **Crucible CPM® Rex® 20® represents the pinnacle of hot hardness in high-speed steel technology.** It is a specialist material engineered for one primary mission: to **maintain a sharp, hard cutting edge under the intense thermal loads of modern, aggressive machining.** Its value is unlocked in applications where heat, not pure abrasion, is the tool killer. By leveraging the synergy of **high cobalt content and the refined microstructure of powder metallurgy**, Rex 20 delivers: - **Unmatched red-hardness** for a steel, allowing higher cutting parameters. - **Superior consistency and grindability** compared to traditional cobalt HSS. - **Extended tool life in high-temperature machining** environments. For manufacturers pushing the boundaries of speed and productivity on the toughest aerospace, power generation, and die & mold materials, **CPM Rex 20 provides a critical performance bridge, offering the thermal resilience needed to maximize machine output where standard HSS fails and where carbide may be too brittle or costly to implement.** It is the definitive choice for high-heat, high-speed HSS machining. --- -:- For detailed product information, please contact sales. -: Crucible Steel CPM® Rex® 20® (HS) High Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5233 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 CPM® Rex® 20® (HS) High Speed Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Crucible Steel Flange CPM® Rex® 20® (HS) High Speed Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Crucible Steel Flange CPM® Rex® 20® (HS) High Speed Steel Flange -:- For detailed product information, please contact sales. -:

Packing of Crucible Steel Flange CPM® Rex® 20® (HS) High Speed 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 1704 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