Assab Steel Flanges,ASSAB XW-42 Cold Work 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. -: Assab Steel Flanges ASSAB XW-42 Cold Work Steel Flange Product Information -:- For detailed product information, please contact sales. -: Assab Steel Flanges ASSAB XW-42 Cold Work Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

Assab Steels ASSAB XW-42 Cold Work Steel Product Information -:- For detailed product information, please contact sales. -: # Technical Datasheet: ASSAB XW-42 (AISI D2 Modified) Cold Work Steel --- ## **1. Product Overview** **ASSAB XW-42** is a premium **high-carbon, high-chromium, air-hardening cold work tool steel** that represents a **chemically enhanced variant of the standard AISI D2/XW-41 composition**. Developed by the ASSAB Group, XW-42 incorporates **significantly higher molybdenum (Mo) and vanadium (V)** content to deliver **superior performance characteristics** including improved toughness, better hardenability, enhanced secondary hardening response, and superior grindability compared to conventional D2 steel. This modified alloy maintains the exceptional wear resistance characteristic of high-chromium steels while addressing some of the inherent limitations of standard D2, making it a **high-performance upgrade** for demanding tooling applications requiring extended service life under severe conditions. XW-42 is particularly valued in applications where improved resistance to chipping and better dimensional stability are required alongside high wear resistance. --- ## **2. Key International Standards & Designations** | Country/System | Standard Designation | Equivalent/Similar Grade | | :--- | :--- | :--- | | **Sweden / ASSAB** | **ASSAB XW-42** | Proprietary Modified D2 Grade | | **USA (AISI/SAE)** | **Modified AISI D2** | No direct AISI equivalent | | **ISO** | **ISO 4957:2018** | **1.2379+** (Enhanced variant) | | **Europe (EN)** | **- -** | Proprietary ASSAB specification | | **Germany (DIN/W-Nr.)** | **- -** | Proprietary composition | | **Japan (JIS)** | **- -** | Proprietary to ASSAB | | **Common Reference** | **"Super D2"** | Industry terminology for Mo/V-enhanced D2 | **Note:** ASSAB XW-42 is a **proprietary grade** without direct, universally standardized equivalents. Its composition falls within the broader high-carbon, high-chromium cold work steel family but with optimized alloy ratios. --- ## **3. Chemical Composition (Typical %)** The enhanced alloy composition distinguishes XW-42 from standard D2/XW-41: | Element | Weight % (XW-42) | Comparison to XW-41 | Metallurgical Function | | :--- | :--- | :--- | :--- | | **Carbon (C)** | 1.50 - 1.60 | Similar | Matrix hardening and carbide formation. | | **Chromium (Cr)** | 11.00 - 12.00 | Similar | Primary carbide former (M₇C₃), provides wear resistance and hardenability. | | **Molybdenum (Mo)** | **0.90 - 1.20** | **Higher** (~0.3-0.4% more) | **Key enhancement:** Improves hardenability, enhances toughness, promotes secondary hardening, improves hot strength. | | **Vanadium (V)** | **1.00 - 1.20** | **Higher** (at upper end) | **Key enhancement:** Forms hard MC carbides, refines grain, increases wear resistance and tempering resistance. | | **Silicon (Si)** | 0.30 - 0.50 | Slightly higher | Deoxidizer, increases tempering resistance. | | **Manganese (Mn)** | 0.40 - 0.60 | Similar | Aids hardenability. | | **Other (P, S)** | < 0.025 | Similar | Low impurities. | **Key Metallurgical Advantages:** - **Enhanced Toughness:** Higher Mo content refines the martensitic structure and improves fracture resistance. - **Improved Secondary Hardening:** Mo and V promote stronger precipitation hardening during tempering (500-550°C range). - **Better Hardenability:** Ensures complete through-hardening in larger sections. - **Superior Grindability:** Optimized carbide size and distribution reduce grinding wheel wear. --- ## **4. Physical & Mechanical Properties** ### **4.1 Standard Heat Treatment** * **Annealing:** Heat to 850-880°C (1565-1615°F), slow furnace cool to 600°C (1110°F). Annealed hardness: **~210-230 HB**. * **Austenitizing:** **1020-1050°C (1870-1920°F)**. Upper range may be used to maximize secondary hardening potential. * **Quenching:** **Air cool** (forced air recommended for consistent results). * **Tempering:** **Double or triple temper essential.** Wider effective range due to enhanced secondary hardening. - **Low-Temp (180-250°C):** 60-62 HRC, maximum wear resistance. - **Mid-Temp (400-500°C):** 58-60 HRC, good balance. - **High-Temp (500-550°C):** **56-58 HRC with peak toughness** (optimal for many applications). ### **4.2 Typical Mechanical Properties (Hardened & Tempered @ 520°C)** | Property | Value / Rating (XW-42) | Advantage vs. Standard D2 | | :--- | :--- | :--- | | **Hardness** | **57 - 59 HRC** (at 520°C temper) | Better hardness retention at high tempering temperatures. | | **Impact Toughness** | **Improved (15-30 J)** | **15-25% better** at equivalent hardness due to finer structure. | | **Abrasive Wear Resistance** | **Excellent to Outstanding** | Slightly improved due to optimized vanadium carbide distribution. | | **Compressive Strength** | ~ 2500 - 2800 MPa | Similar to D2, very high. | | **Dimensional Stability** | **Excellent** | Potentially better due to more complete transformation. | | **Grindability** | **Good (for a high-Cr steel)** | Noticeably better than standard D2. | ### **4.3 Physical Properties (Approximate)** * Density: 7.70-7.72 g/cm³ * Thermal Conductivity: ~22 W/m·K * Coefficient of Thermal Expansion: 10.5 x 10⁻⁶/K (20-200°C) * Modulus of Elasticity: 210 GPa --- ## **5. Typical Product Applications** ASSAB XW-42 is specified for **high-performance tooling** where the limitations of standard D2 are a concern, particularly in terms of chipping resistance and grindability. * **Precision Blanking & Punching Dies:** For abrasive and high-strength materials (e.g., advanced high-strength steel/AHSS, silicon steel, composites) requiring extended tool life. * **Thread Rolling Dies & Knurls:** For hard or tough workpiece materials where die pressure is high. * **Cold Forming Tools & Extrusion Dies:** Subject to high pressure and wear. * **Slitter Knives & Rotary Cutters:** For demanding materials where edge chipping is an issue. * **Precision Plastic Molds:** For highly abrasive filled plastics (long-glass fiber, mineral-filled) requiring excellent polishability and wear resistance. * **Gauges & Wear Parts:** Where dimensional stability under load and wear resistance are critical. --- ## **6. Processing & Manufacturing Guidelines** * **Machinability (Annealed):** **Fair to Poor** (~35% of 1% C steel). Similar to D2; requires carbide tooling and rigid setups. * **Grindability:** **Good (relative to D2).** The optimized carbide structure reduces grinding wheel wear and heat generation. Use aluminum oxide or CBN wheels with appropriate coolant. * **EDM Machining:** Excellent results. Post-EDM stress relief (180-200°C) remains recommended. * **Polishability:** **Excellent.** ASSAB's high cleanliness and the refined carbide structure allow for superior surface finishes (Ra < 0.05 µm achievable). * **Surface Treatments:** Responds exceptionally well to: - **Nitriding:** (Gas or Plasma) for increased surface hardness and anti-galling properties. - **PVD Coatings:** (TiAlN, AlCrN, DLC) to further enhance wear and corrosion resistance. --- ## **7. Comparative Performance & Selection Notes** | Criterion | ASSAB XW-42 | ASSAB XW-41 (Std D2) | ASSAB VANADIS 4 Extra (PM) | | :--- | :--- | :--- | :--- | | **Wear Resistance** | Excellent | Excellent | **Superior** | | **Toughness** | **Better** | Good | **Best** | | **Grindability** | **Better** | Fair | Good | | **Cost** | Moderate-High | Moderate | High | | **Primary Advantage** | **Balanced upgrade over D2** | Proven wear resistance | Ultimate wear+toughness combo | **When to Choose XW-42 over XW-41:** 1. Tool designs are **more complex or have thinner sections** prone to chipping. 2. The application involves **moderate, unpredictable shock loads**. 3. **Grinding is a significant part** of the tool manufacturing process. 4. Tools will be used at **higher operating temperatures** (benefits from secondary hardening). 5. A **performance upgrade from D2 is needed** without stepping up to premium powder metallurgy steels. --- ## **8. Important Design & Handling Notes** 1. **Heat Treatment Precision:** The enhanced alloy responds best to **precise, controlled heat treatment**. Use calibrated furnaces and follow ASSAB's recommended cycles closely. 2. **Tempering Flexibility:** The strong secondary hardening response allows effective use of **higher tempering temperatures (500-550°C)** to achieve an optimal toughness/hardness balance for many applications. 3. **Corrosion Resistance:** Similar to D2 (~12% Cr) – good against oxidation and mild corrosion, but not for severely corrosive environments. 4. **Not a Shock Steel:** Despite improved toughness, it remains a **wear-resistant steel**. Do not use for severe impact applications (use ASSAB CALMAX or similar). --- ## **9. Conclusion** **ASSAB XW-42 represents the evolution of the classic D2 cold work steel, intelligently modified to overcome its predecessor's key weaknesses.** By strategically increasing molybdenum and vanadium, ASSAB has created a grade that delivers: - **Superior toughness** at equivalent hardness levels, reducing chipping risk. - **Enhanced grindability**, lowering manufacturing time and cost. - **Stronger secondary hardening**, providing greater thermal stability and tempering flexibility. While maintaining the **exceptional wear resistance** that made D2 famous, XW-42 is the **right choice for demanding applications where standard D2 tools have shown limitations in terms of brittle fracture or manufacturing difficulty**. It sits in a valuable performance niche between conventional D2 and premium powder metallurgy steels, offering a significant upgrade in reliability and performance for critical, long-run tooling applications where total cost of ownership—not just initial material cost—is a primary concern. For the toolmaker or engineer seeking a **higher-performance D2 variant from a trusted manufacturer**, ASSAB XW-42 is an excellent, proven option. -:- For detailed product information, please contact sales. -: Assab Steels ASSAB XW-42 Cold Work Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5223 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. -: Assab Steels ASSAB XW-42 Cold Work Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Assab Steel Flanges ASSAB XW-42 Cold Work Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Assab Steel Flanges ASSAB XW-42 Cold Work Steel Flange -:- For detailed product information, please contact sales. -:

Packing of Assab Steel Flanges ASSAB XW-42 Cold Work 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 1694 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