Bohler-Uddeholm,BÖHLER S401(M1) 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. -: Bohler-Uddeholm BÖHLER S401(M1) High Speed Steel Flange Product Information -:- For detailed product information, please contact sales. -: Bohler-Uddeholm BÖHLER S401(M1) High Speed Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

Bohler-Uddeholm BÖHLER S401(M1) High Speed Steel Product Information -:- For detailed product information, please contact sales. -: # **Böhler-Uddeholm BÖHLER S401 (M1) High Speed Steel** ## **Product Overview** **BÖHLER S401** is a high-performance **tungsten-molybdenum alloyed high-speed steel** conforming to the AISI M1 specification. Representing one of the foundational tungsten-molybdenum balance grades in the high-speed steel family, S401 is engineered to provide **excellent toughness, good wear resistance, and superior grindability**. This grade is particularly valued for applications requiring shock resistance and where ease of manufacturing is critical, serving as a reliable alternative to M2-type steels when maximum toughness and machinability are prioritized over extreme wear resistance. --- ## **1. Key Characteristics & Advantages** * **Exceptional Toughness:** Offers superior impact resistance and fracture toughness compared to higher-carbon, higher-vanadium high-speed steels like M2 and M4, making it ideal for tools subjected to intermittent cutting or shock loads. * **Excellent Grindability:** One of the most grindable high-speed steels, significantly easier to grind and resharpen than M2, M4, or cobalt-bearing grades, reducing manufacturing costs and lead times. * **Good Hot Hardness (Red Hardness):** Maintains adequate cutting edge integrity at elevated temperatures typical of high-speed machining operations. * **Good Wear Resistance:** Provides sufficient wear resistance for many general-purpose and semi-finishing applications. * **Superior Machinability in Annealed State:** Easier to machine than many other high-speed steels, facilitating complex tool fabrication. * **Good Through-Hardening Capability:** Can be uniformly hardened in substantial sections for consistent performance. * **Cost-Effective Manufacturing:** Lower grinding costs and longer grinding wheel life contribute to overall tool manufacturing economy. --- ## **2. Typical Chemical Composition (Weight %)** | Element | Carbon (C) | Tungsten (W) | Molybdenum (Mo) | Chromium (Cr) | Vanadium (V) | | :--- | :---: | :---: | :---: | :---: | :---: | | **Content** | **0.78 - 0.88** | **1.40 - 2.10** | **8.00 - 9.00** | **3.50 - 4.00** | **1.00 - 1.30** | **Alloying Rationale:** * **High Molybdenum (8.5%):** The primary alloying element, providing strong secondary hardening, good hardenability, and contributing significantly to hot hardness at a favorable cost. * **Moderate Tungsten (1.75%):** Works synergistically with molybdenum to enhance hot hardness and tempering resistance. * **Vanadium (1.15%):** Provides basic wear resistance through vanadium carbide formation while maintaining good grindability. * **Lower Carbon (0.83%):** Compared to M2 (~0.95%), this lower carbon content is key to S401's superior toughness and grindability, while still forming sufficient carbides for wear resistance. * **Chromium (3.75%):** Provides essential hardenability and contributes to overall wear characteristics. --- ## **3. Physical & Mechanical Properties** ### **Physical Properties:** * **Density:** ~8.10 g/cm³ * **Thermal Conductivity:** ~27 W/(m·K) at 20°C * **Modulus of Elasticity:** ~215 GPa * **Coefficient of Thermal Expansion:** ~11.5 x 10⁻⁶/K (20-400°C) ### **Heat Treatment & Mechanical Data:** * **Annealed Hardness:** ~230 HBW (max) * **Austenitizing Temperature:** 1190 - 1220°C (2175 - 2230°F) * **Quenching Medium:** Salt bath, vacuum/pressurized gas, or oil. * **Tempering:** **Double tempering is required.** Temperature range: 540 - 590°C (1005 - 1095°F). * **Achievable Hardness:** **63 - 65 HRC** * Typical operating hardness is **63-64 HRC** after tempering at 560-580°C, optimizing the toughness-hardness balance. * **Hot Hardness (600°C):** ~53-55 HRC * **Transverse Rupture Strength:** ~3500 - 3800 MPa (notably high due to toughness) * **Impact Toughness:** Excellent for a high-speed steel; typically 30-50% higher than M2 at equivalent hardness. --- ## **4. Primary Applications** BÖHLER S401 (M1) is ideally suited for tools where shock resistance and manufacturability are primary concerns. * **Cutting Tools Subject to Shock:** * **Broaches** and form tools requiring high fracture resistance. * **Thread cutting dies** and taps for tough materials. * **Milling cutters** for interrupted cuts. * **Drills** for applications with poor rigidity or hole misalignment. * **Tools Requiring Complex Grinding:** * **Gear hobs** with complex profiles. * **Form-relieved milling cutters.** * **Specialty cutting tools** with intricate geometries. * **Cold Work Applications:** * **Punches** for cold heading and forming where chipping is a concern. * **Blankng dies** for non-abrasive materials requiring tough tooling. * **Woodworking Tools:** High-performance planer knives and cutterheads. --- ## **5. Relevant International Standards & Comparable Grades** BÖHLER S401 is the Böhler-Uddeholm designation for AISI M1 high-speed steel. | Standard | Grade / Designation | Country/Region | Note | | :--- | :--- | :--- | :--- | | **AISI / ASTM A600** | **M1** | USA | Direct equivalent. | | **ISO 4957** | **HS1-8-1** | International | Corresponding ISO designation (approx. 1%W, 8%Mo, 1%V). | | **DIN / Werkstoff** | **~1.3345** | Germany/EU | Often specified by chemical composition rather than a standard number. | | **JIS G4403** | **SKH53** | Japan | The Japanese M1 equivalent. | | **Performance Comparison** | **vs. M2** | N/A | S401 (M1) has lower C and V than M2, resulting in better toughness and grindability but lower wear resistance. | | **Performance Comparison** | **vs. M7** | N/A | S401 has lower C and V than S400 (M7), making it tougher and easier to grind, with slightly lower wear resistance. | --- ## **6. Processing & Fabrication Guidelines** * **Supply Form:** Round bars, square bars, flat stock, and tool blanks. * **Machining:** **Excellent machinability for a high-speed steel** in the annealed condition. Produces relatively short chips and is kinder to cutting tools than higher-alloy grades. * **Grinding:** **Outstanding grindability.** Considered one of the easiest high-speed steels to grind. This allows for faster material removal, finer finishes, and extended grinding wheel life. Use standard aluminum oxide wheels. * **EDM:** Performs well. A stress-relieving temper (~550°C) post-EDM is recommended for precision tools. * **Heat Treatment:** Requires standard high-speed steel heat treatment practices in a controlled atmosphere. 1. **Preheating:** 800-850°C and 1050-1100°C. 2. **Austenitizing:** Controlled temperature is key to achieving optimal hardness without grain growth. 3. **Quenching:** Oil, salt, or gas quenching are all suitable. 4. **Tempering:** **Double temper immediately.** A third temper enhances dimensional stability. * **Surface Treatment:** Can be coated with standard PVD coatings (TiN, TiCN) to improve performance, though its primary advantages are bulk properties. --- ## **7. Conclusion** **BÖHLER S401 (M1)** occupies a vital niche as the **high-toughness, high-grindability workhorse** of the high-speed steel family. It excels in applications where tool failure due to chipping or breakage is a greater risk than gradual wear, and where complex tool geometries make grindability a critical economic factor. While it may not offer the ultimate in wear resistance or hot hardness, its balanced properties make it an exceptionally reliable and manufacturable choice. For toolmakers producing intricate tools, for applications involving intermittent cutting or shock, or when grinding costs are a significant portion of tool manufacturing, S401 provides an optimal, cost-effective solution that maximizes tool reliability and manufacturing efficiency. It remains a fundamental and highly valued grade for practical, demanding industrial tooling. -:- For detailed product information, please contact sales. -: Bohler-Uddeholm BÖHLER S401(M1) High Speed Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6903 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. -: Bohler-Uddeholm BÖHLER S401(M1) High Speed Steel Properties -:- For detailed product information, please contact sales. -:

Applications of Bohler-Uddeholm BÖHLER S401(M1) High Speed Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers Bohler-Uddeholm BÖHLER S401(M1) High Speed Steel Flange -:- For detailed product information, please contact sales. -:

Packing of Bohler-Uddeholm BÖHLER S401(M1) 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 3374 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