JIS SK6M Water Hardening 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. -: JIS SK6M Water Hardening Tool Steel Flange Product Information -:- For detailed product information, please contact sales. -: JIS SK6M Water Hardening Tool Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

JIS SK6M Water Hardening Tool Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Datasheet: JIS SK6M Water-Hardening Tool Steel (Mo-Modified)** --- #### **1. Product Overview** **JIS SK6M** is a medium-high-carbon, **molybdenum-modified water-hardening tool steel** specified under the Japanese Industrial Standard (JIS) G 4404. As the molybdenum-enhanced variant of the standard SK6 grade, it offers a technologically optimized balance within the water-hardening family. With a nominal carbon content of 0.70-0.80%, it is designed to provide a superior combination of **good wear resistance, enhanced hardenability, and improved toughness** compared to its plain carbon counterpart. The strategic addition of molybdenum refines the steel's microstructure, reduces the severity of required quenching, and improves performance consistency, making SK6M a reliable and cost-effective choice for more demanding tooling applications where plain carbon steels may fall short. --- #### **2. International Standard Cross-Reference** SK6M is defined under JIS G 4404 as a molybdenum-type carbon tool steel, with functional equivalents in other international systems. | Standard System | Equivalent / Similar Grade | Note | | :--- | :--- | :--- | | **JIS G 4404 (Japan)** | **SK6M** | Defining standard (Molybdenum-type) | | **ASTM (USA)** | W2-0.8C (Mo variant) | Similar medium-high carbon water-hardening grade with Mo | | **DIN (Germany)** | 1.2002 / C80W2 | Similar carbon content and quenching method | | **BS (UK)** | **BW1B (0.8C Mo-modified)** | Water-hardening grade with Mo addition | | **ISO** | ~TC80 (Modified) | Similar application scope | | **GB (China)** | **T8Mo** | Modified medium-high carbon tool steel with Mo | | **AISI/SAE (USA)** | ~1078 (Modified) | Similar base composition, often used for springs and tools | --- #### **3. Chemical Composition (Typical, weight % per JIS G 4404)** The composition is characterized by a balanced carbon content and the critical addition of Molybdenum. | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | **Molybdenum (Mo)** | Phosphorus (P) | Sulfur (S) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Content (%)** | 0.70 - 0.80 | 0.10 - 0.30 | 0.30 - 0.60 | **0.10 - 0.25** | ≤ 0.030 | ≤ 0.030 | **Function of Key Elements:** * **Carbon (0.70-0.80%):** Provides the foundation for martensitic hardening, offering a balanced potential for hardness and toughness. * **Molybdenum (0.10-0.25%):** The key enhancement. It increases hardenability for deeper and more uniform hardening, refines grain size for improved toughness and fatigue resistance, and reduces the sensitivity to quench cracking. --- #### **4. Physical & Mechanical Properties** * **Density:** ~7.85 g/cm³ * **Thermal Conductivity:** Moderate. * **Machinability (Annealed State):** Good. The combination of spheroidized annealed structure and Mo addition allows for relatively good machinability for a tool steel. * **Hardenability:** **Moderate (Significantly Improved over SK6).** The Mo addition provides a deeper and more consistent hardened zone, making it suitable for sections up to approximately 25mm, depending on geometry. * **Primary Quenching Medium:** **Water, Brine, or Fast Polymer Quenchant.** The improved hardenability often allows for the use of less severe quenchants (e.g., agitated warm water or brine) compared to plain SK6, reducing distortion. * **Typical Achievable Hardness:** * **Annealed State:** ~ 170 - 207 HB * **Hardened & Tempered State:** **59 - 62 HRC** (Can achieve up to 63 HRC with optimal processing and low-temperature tempering). --- #### **5. Heat Treatment Guidelines** * **Forging:** Heat uniformly to 1050-850°C. Cool slowly in furnace or an insulating medium. * **Annealing:** Heat to 750-780°C, slow furnace cool to ~500°C. A full spheroidize anneal is recommended for best machinability and subsequent heat treatment response. * **Hardening:** 1. **Preheat:** Essential at 650-700°C. 2. **Austenitizing:** **790-820°C.** The Mo allows for good carbide solutioning at this range. 3. **Soak:** 20-30 minutes per inch of thickness. 4. **Quench:** Agitate in **water, brine, or a fast polymer solution.** For complex shapes, a fast oil quench may sometimes be used as a less severe alternative, albeit with slightly lower final hardness. * **Tempering:** **Must be performed immediately** after quenching. For maximum hardness and wear resistance, temper at **150-200°C for 1-2 hours.** For applications requiring better toughness, tempering at **250-350°C** is effective (resulting hardness ~54-59 HRC). --- #### **6. Product Applications** SK6M is employed in applications that demand a balance of hardness and toughness, often where standard SK6 might lack sufficient hardenability or shock resistance. * **Cutting Tools:** **Heavy-duty shear blades, industrial knives for cutting composite materials, band saw blades** for metal and wood, and slitter knives. * **Forming & Stamping Tools:** **Punches, dies, and forming tools** for medium-thickness materials, where improved toughness reduces chipping. * **Hand & Impact Tools:** **Cold chisels for metal, pry bars, heavy-duty screwdrivers, and wrench sockets.** * **Agricultural & Forestry Equipment:** **Chipper knives, heavy-duty mower blades, and tiller teeth.** * **Wear Parts & Machine Components:** **Guide rails, cam surfaces, pins, and bushings** subjected to sliding wear and moderate impact. * **Springs:** **High-stress flat springs and spring washers** requiring a high elastic limit and good fatigue resistance. --- #### **7. Advantages & Limitations** | Advantages | Limitations | | :--- | :--- | | • **Excellent balance of hardness and toughness** within the water-hardening family.
• **Improved hardenability and more uniform hardness profile** than SK6.
• **Better resistance to shock and chipping** due to finer grain structure from Mo.
• **Reduced risk of quench cracking and distortion**, allowing for more complex geometries.
• **Good fatigue resistance** for dynamic load applications. | • **Still requires relatively severe quenching** compared to oil-hardening steels.
• **Not suitable for very thick sections** requiring deep through-hardening.
• **Low hot hardness;** unsuitable for high-speed or hot-work applications.
• **Higher cost than plain SK6**, though still economical versus high-alloy steels. | --- #### **8. Comparative Selection Guide** * **SK6 vs. SK6M:** Choose **SK6M** for applications requiring **better consistency in hardening, higher toughness, or the ability to harden slightly thicker sections reliably.** SK6 may suffice for very simple, low-stress tools where cost is paramount. * **SK6M vs. Oil-Hardening (e.g., SKS93/O1):** SK6M can achieve a **slightly higher peak hardness**, but oil-hardening steels offer **superior dimensional control, minimal distortion, and better hardenability in complex shapes.** The choice depends on the priority: ultimate hardness (SK6M) vs. dimensional stability (Oil-hardening). * **SK6M vs. Shock-Resisting (e.g., SKS4):** For **high-impact applications**, shock-resisting steels are superior. SK6M is better suited for **applications combining wear and moderate shock.** **Conclusion:** JIS SK6M is a **highly versatile and practical grade** within the water-hardening tool steel category. The molybdenum modification successfully elevates the performance of the base SK6 composition, making it a **premium, yet cost-effective, choice for a broad range of industrial tooling and component applications.** It is particularly well-suited for tools that must withstand a combination of abrasive wear and intermittent shock loading. For tool designers and manufacturers seeking to upgrade from plain carbon steels without venturing into the realm of high-alloy grades, SK6M represents an **excellent intermediate solution** with proven reliability and performance. -:- For detailed product information, please contact sales. -: JIS SK6M Water Hardening Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6795 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. -: JIS SK6M Water Hardening Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS SK6M Water Hardening Tool Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS SK6M Water Hardening Tool Steel Flange -:- For detailed product information, please contact sales. -:

Packing of JIS SK6M Water Hardening 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 3266 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