JIS SKC11 Low-Alloy 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 SKC11 Low-Alloy Tool Steel Flange Product Information -:- For detailed product information, please contact sales. -: JIS SKC11 Low-Alloy Tool Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

JIS SKC11 Low-Alloy Tool Steel Product Information -:- For detailed product information, please contact sales. -: ### **Product Technical Datasheet: JIS SKC11 Low-Alloy Tool Steel** --- #### **1. Product Overview** **JIS SKC11** is a low-alloy, non-deforming cold work tool steel classified under the Japanese Industrial Standard (JIS) G 4404. It is specifically designed as an **oil-hardening grade**, offering significant advantages over traditional water-hardening steels (SK series) in terms of reduced distortion, lower risk of cracking, and better hardenability. SKC11 provides a balanced combination of **good wear resistance, moderate toughness, and excellent dimensional stability** during heat treatment. Its alloy composition, featuring chromium and tungsten, allows it to achieve adequate hardness for many cold work applications while maintaining simpler and safer heat treatment procedures compared to air-hardening grades. It serves as a reliable and economical choice for precision tools and dies where dimensional accuracy is critical. --- #### **2. International Standard Cross-Reference** SKC11 has direct and close equivalents in other major tool steel standard systems. | Standard System | Equivalent / Similar Grade | Note | | :--- | :--- | :--- | | **JIS G 4404 (Japan)** | **SKC11** | Defining Standard | | **ASTM (USA)** | **O1** | The most common direct equivalent (Oil-hardening, non-deforming) | | **DIN (Germany)** | **1.2510 / 100MnCrW4** | Nearly identical composition | | **BS (UK)** | **BO1** | Oil-hardening non-deforming tool steel | | **AISI (USA)** | **O1** | Identical grade designation | | **GB (China)** | **9CrWMn** | Very similar composition (China's equivalent to O1) | | **ISO** | **~80MnCrW4-2-2** | ISO designation for similar composition | --- #### **3. Chemical Composition (Typical, weight % per JIS G 4404)** The composition includes strategic low-level additions of alloying elements to enhance hardenability and wear resistance. | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Chromium (Cr) | Tungsten (W) | Phosphorus (P) | Sulfur (S) | | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | | **Content (%)** | 0.90 - 1.00 | ≤ 0.35 | 1.00 - 1.30 | 0.40 - 0.70 | 0.40 - 0.70 | ≤ 0.030 | ≤ 0.030 | **Function of Key Alloying Elements:** * **Carbon (0.90-1.00%):** Provides high hardness and wear resistance. * **Manganese (1.00-1.30%) & Chromium (0.40-0.70%):** Significantly increase hardenability, allowing oil quenching and deeper hardening than plain carbon steels. * **Tungsten (0.40-0.70%):** Forms hard carbides for improved wear resistance and contributes to grain refinement and a degree of hot hardness. * This combination makes SKC11 a **non-deforming or minimal-distortion steel**. --- #### **4. Physical & Mechanical Properties** * **Density:** ~7.85 g/cm³ * **Thermal Conductivity:** Moderate. * **Machinability (Annealed State):** Fair to Good. Better than many higher-alloy steels but more challenging than plain carbon steels due to its alloy content. * **Hardenability:** **Good (Oil-Hardening).** Capable of through-hardening sections up to approximately 75-100mm diameter in oil. This is a major advantage over water-hardening steels. * **Primary Quenching Medium:** **Oil.** This slower, more controlled quench is the source of its minimal distortion characteristics. * **Dimensional Stability:** **Excellent.** Exhibits very low volume change and distortion during heat treatment compared to water-hardening steels. * **Typical Achievable Hardness:** * **Annealed State:** ~ 192 - 229 HB * **Hardened & Tempered State:** **60 - 63 HRC** (Tempered at low temperatures, 150-200°C). --- #### **5. Heat Treatment Guidelines** * **Forging:** Heat to 1050-850°C. Cool slowly in furnace or insulating material. * **Annealing:** Heat to 750-780°C, slow furnace cool to ~500°C, then air cool. Achieves a fully spheroidized structure for best machinability. * **Stress Relieving (after machining):** 600-650°C, slow cool. * **Hardening:** 1. **Preheat:** 650-700°C (highly recommended). 2. **Austenitizing:** **780-820°C.** Soak adequately (approx. 20-30 min/inch). 3. **Quench:** Agitate in **well-circulated, medium-speed quenching oil** until hand-warm. * **Tempering:** Perform immediately. Temper at **150-200°C for 1-2 hours** for maximum hardness. For higher toughness, temper at **250-400°C**, accepting a lower hardness (55-60 HRC). **Note:** A slight secondary hardening peak may occur around 200-250°C. --- #### **6. Product Applications** SKC11 (O1) is one of the most widely used general-purpose cold work tool steels due to its excellent balance of properties and reliable heat treatment. * **Precision Gauges & Measuring Tools:** **Plug gauges, thread gauges, ring gauges, and master templates** where dimensional stability is paramount. * **Blankng & Forming Dies:** **Precision blanking dies, bending dies, forming dies, and coining dies** for sheet metal. * **Cutting Tools:** **Taps, reamers, broaches, and precision knives** for low-to-medium production runs. * **Molds & Tooling:** **Plastic injection molds (for low-abrasive materials), zinc die-casting molds, and pattern dies.** * **Machine Parts:** **Cams, guides, pins, and shafts** requiring wear resistance and stability. * **Hand Tools:** **High-quality wrenches, sockets, and precision screwdrivers.** --- #### **7. Advantages & Limitations** | Advantages | Limitations | | :--- | :--- | | • **Minimal distortion during heat treatment** (Non-deforming).
• **Low risk of quench cracking** due to oil quenching.
• **Good hardenability** for through-hardening of moderate sections.
• **Good machinability and grindability** in annealed state.
• **Excellent dimensional stability** for precision tools.
• **More consistent and predictable heat treatment** than water-hardening steels. | • **Lower wear resistance** compared to high-carbon, high-chromium steels (e.g., SKD11/D2).
• **Limited hot hardness;** not suitable for high-speed cutting or hot work.
• **Less tough** than some shock-resistant grades (e.g., SKS series).
• **Can be susceptible to decarburization** during heat treatment if not protected. | --- #### **8. Comparative Selection Guide** * **vs. Water-Hardening (SK series):** SKC11 is **vastly superior in dimensional control and suitable for complex shapes.** It should be the default upgrade from water-hardening steels for precision tools. * **vs. Air-Hardening (e.g., SKD11/A2/D2):** SKC11 has **simpler heat treatment (no need for controlled atmosphere for small parts)** and better machinability, but offers **lower wear resistance and less dimensional stability for very large, intricate dies.** Air-hardening grades are preferred for maximum wear and minimal size change. * **vs. Other Oil-Hardening Grades:** It is the **standard and most common grade** in this category. Grades like SKS3 (similar) might offer slight variations in alloy balance. **Conclusion:** JIS SKC11 (Oil-hardening O1 steel) is a **fundamental and indispensable grade in the toolmaker's inventory.** It perfectly fills the niche for **precision cold-work tooling that requires excellent dimensional accuracy, good all-around performance, and straightforward heat treatment.** Its reputation for reliability and consistency makes it a first-choice material for a vast range of gauges, dies, and molds. While not the ultimate in wear resistance or toughness, its balanced performance and user-friendly nature ensure it remains a cornerstone of tool and die manufacturing worldwide. -:- For detailed product information, please contact sales. -: JIS SKC11 Low-Alloy Tool Steel Specification Dimensions Size： Diameter 20-1000 mm Length <6796 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 SKC11 Low-Alloy Tool Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS SKC11 Low-Alloy Tool Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS SKC11 Low-Alloy Tool Steel Flange -:- For detailed product information, please contact sales. -:

Packing of JIS SKC11 Low-Alloy 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 3267 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