JIS S20CK Carbon 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 S20CK Carbon Steel Flange Product Information -:- For detailed product information, please contact sales. -: JIS S20CK Carbon Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

JIS S20CK Carbon Steel Product Information -:- For detailed product information, please contact sales. -: ## **Product Introduction: JIS S20CK Special Quality Carbon Steel for Carburizing** **JIS S20CK** is a **special quality carbon steel** grade specified by the Japanese Industrial Standards (JIS) system. The **"K" suffix** (from the Japanese "Kōzō" - structure) indicates it is a **steel for carburizing**, characterized by more stringent control over chemical composition and hardenability compared to the standard S20C grade. This steel is specifically designed and optimized for **case hardening processes**, primarily carburizing or carbonitriding. Its carefully balanced composition ensures the formation of a deep, hard, and wear-resistant surface layer after carburizing and quenching, while maintaining a tough and ductile core to withstand impact and fatigue loads. S20CK is typically supplied in a normalized or hot-rolled condition to facilitate machining prior to the final heat treatment. --- ### **1. Chemical Composition (JIS G 4051 & G 4106 Reference)** The composition is defined with tighter controls than standard grades. While JIS G 4051 covers it, its use aligns with the spirit of special-quality steels. Key ranges are as follows (in weight %): | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | **Key Difference** | | :------------- | :--------- | :----------- | :------------- | :------------- | :--------- | :----------------- | | **S20CK Content** | 0.18-0.23 | 0.15-0.35 | **0.60-0.90** | **≤ 0.025** | **≤ 0.025** | Tighter P,S control & higher Mn. | | *vs. S20C* | Same | Same | *0.30-0.60* | *≤ 0.030* | *≤ 0.035* | | **Critical Features of the Composition:** * **Higher Manganese (Mn):** Enhances **hardenability**, ensuring a more consistent and deeper hardened case after quenching, especially for components with thicker cross-sections. * **Lower Phosphorus (P) & Sulfur (S):** Reduced impurity levels minimize the risk of segregation and improve **ductility and impact toughness** of the core material. * **Guaranteed Hardenability:** S20CK is often supplied with a **hardenability band guarantee** (similar to the AISI H-band system), ensuring predictable and consistent results in heat treatment. --- ### **2. Physical & Mechanical Properties** Properties are highly dependent on the final heat treatment cycle. Values below are for the **supplied (normalized) condition** and the **final case-hardened state**. **A. Supplied (Normalized/Hot-Rolled) Condition:** * **Tensile Strength (σb):** 430 - 550 MPa * **Yield Strength (σ0.2):** ≥ 255 MPa * **Elongation (δ):** ≥ 23% * **Hardness:** 121 - 156 HB * **Machinability:** Good in the normalized state. **B. After Case Hardening (e.g., Carburizing, Quenching & Tempering):** * **Surface (Case) Hardness:** **58 - 63 HRC** (typical carburized & quenched hardness). * **Effective Case Depth:** Variable (typically 0.5mm - 2.0mm), controllable via process parameters. * **Core Hardness:** **25 - 40 HRC** (provides strong support for the hard case). * **Core Properties:** Maintains good tensile strength (700-900 MPa range) and high impact toughness. --- ### **3. Product Applications** JIS S20CK is the material of choice for high-performance, **case-hardened components** subjected to wear, rolling contact, and dynamic loads. Its predictable behavior makes it essential for automotive and heavy machinery. * **Automotive & Truck Components:** **Gears** (transmission, differential), **spline shafts**, **camshafts**, **piston pins**, **kingpins**, and **bearing races**. * **Heavy Machinery:** Sprockets, roller bearings, track links, and heavy-duty pins and bushings. * **Agricultural Equipment:** Transmission gears, drive axle components, and tiller parts. * **General High-Stress Parts:** Any component requiring an extremely hard, wear-resistant surface combined with a shock-absorbing core. --- ### **4. International & Equivalent Standards** The "CK" designation aligns with international special-quality carburizing steel standards that guarantee hardenability. | Standard System | Equivalent Grade | Condition / Remark | | :-------------- | :--------------- | :----------------- | | **JIS** | **S20CK** | Primary standard (Special quality for carburizing). | | **ASTM/AISI** | **1022H** | The closest direct equivalent. The **"H"** suffix denotes guaranteed hardenability, matching the purpose of S20CK. | | **SAE** | SAE 1022H | Same as AISI. | | **DIN (EN)** | 1.1167 (C22R / Cf22) | European quality steel for case hardening. | | **ISO** | ISO 683-11: Type 1 | International standard for case-hardening steels. | | **GB (China)** | 20CrH (Approx.) | Chinese equivalent with similar application, though may contain trace chromium. | **Crucial Note:** While standard grades like AISI 1020/1022 are similar in composition, **S20CK's guaranteed hardenability makes it distinct.** For critical applications, specifying the "H"-grade or "CK" designation is mandatory to ensure consistent heat treatment results. --- ### **5. Key Advantages & Considerations** **Advantages:** * **Optimized for Carburizing:** Chemistry and hardenability are tailored for superior case depth, hardness, and core properties. * **Consistent Heat Treatment Response:** Guaranteed hardenability band minimizes batch-to-batch variation in final part performance. * **Excellent Core Toughness:** Provides outstanding fatigue and impact resistance under the hardened case. * **Good Machinability in Supplied State:** Allows for precision machining before final hardening. **Considerations:** * **Cost:** Premium over standard S20C due to tighter chemical controls and testing. * **Requires Final Heat Treatment:** Components are not ready for use in the supplied state; a full carburize-quench-temper cycle is mandatory. * **Distortion Management:** Like all case-hardening processes, part distortion during quenching must be accounted for in design and machining. --- **Disclaimer:** The information provided is for general reference and selection purposes. For engineering design and heat treatment specification, always consult the official material data sheets from the steel producer and engage with qualified heat treatment specialists. The final properties are a direct result of the specific carburizing and quenching parameters used. -:- For detailed product information, please contact sales. -: JIS S20CK Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5062 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 S20CK Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS S20CK Carbon Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS S20CK Carbon Steel Flange -:- For detailed product information, please contact sales. -:

Packing of JIS S20CK Carbon 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 1533 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