JIS S20C 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 S20C Carbon Steel Flange Product Information -:- For detailed product information, please contact sales. -: JIS S20C Carbon Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

JIS S20C Carbon Steel Product Information -:- For detailed product information, please contact sales. -: ## **Product Introduction: JIS S20C Low Carbon Steel** **JIS S20C** is a standard low-carbon steel grade specified by the Japanese Industrial Standards (JIS) system. Classified under **carbon steels for machine structural use**, it is characterized by its low carbon content, which provides excellent ductility, good weldability, and ease of formability. The "S" denotes "Steel," "20" indicates an average carbon content of 0.20%, and "C" stands for Carbon steel. S20C is typically supplied in a **normalized, annealed, or hot-rolled** condition. Its relatively soft state makes it highly machinable and suitable for cold-working processes like bending, forging, and drawing. While its core strength is moderate, it can be surface hardened through processes like carburizing or carbonitriding to create a wear-resistant exterior while maintaining a tough core. This combination of properties makes it a versatile and economical choice for a wide array of non-critical structural and mechanical components. --- ### **1. Chemical Composition (JIS G 4051 Standard)** The composition is strictly defined by JIS G 4051 (Carbon steels for machine structural use). Key elements are as follows (in weight %): | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Copper (Cu)* | | :------------- | :--------- | :----------- | :------------- | :------------- | :--------- | :----------- | | **Content** | 0.18-0.23 | 0.15-0.35 | 0.30-0.60 | ≤ 0.030 | ≤ 0.035 | ≤ 0.30 | ***Note:** Copper content is a residual element limit. The balanced, low-carbon composition is the primary driver of its formability and weldability.* --- ### **2. Physical & Mechanical Properties (Typical Values for Hot-Rolled/Normalized Condition)** Properties are for commonly supplied conditions and are influenced by the exact processing and section size. * **Tensile Strength (σb):** 410 - 500 MPa * **Yield Strength (σ0.2):** ≥ 245 MPa * **Elongation (δ):** ≥ 25% * **Reduction of Area (ψ):** ≥ 55% * **Hardness:** ~ 111 - 149 HB (Approx. 65-80 HRB) * **Impact Toughness (Charpy):** Good (Inherently tough due to low carbon content) * **Modulus of Elasticity (E):** ~ 200 - 210 GPa * **Density:** 7.85 g/cm³ **Common Heat Treatments (Applied post-manufacturing as needed):** * **Normalizing/Annealing:** To refine grain structure and ensure uniformity. * **Carburizing:** A case-hardening process where the surface carbon content is increased, followed by quenching, to create a hard, wear-resistant surface layer (~50-60 HRC) over a tough, ductile core (typical S20C properties). * **Cold Drawing:** To increase strength and improve surface finish for precision parts. --- ### **3. Product Applications** JIS S20C is widely used for general-purpose, low-to-moderately stressed components where formability, weldability, or suitability for case hardening are key requirements. * **General Machinery Parts:** Bolts, nuts, studs, shafts with low stress, levers, and linkages. * **Automotive Components:** Non-critical brackets, clips, covers, and various small fixtures. Commonly used for **carburized parts** like pins, bushings, and light-duty gears. * **Structural Frames:** Basic frames, supports, and chassis in industrial equipment where high strength is not the primary concern. * **Cold-Formed/Forged Parts:** Components manufactured via cold forging or drawing due to its excellent ductility. * **Pipes and Tubes:** For general mechanical and structural purposes. --- ### **4. International & Equivalent Standards** JIS S20C has direct or close equivalents in all major international standards systems. | Standard System | Equivalent Grade | Condition / Remark | | :-------------- | :----------------------- | :--------------------------------------------------------------------------------- | | **JIS** | **S20C** | Primary standard (JIS G 4051) | | **ASTM/AISI** | 1020, 1022 | Virtually identical in composition and application. The most common direct equivalents. | | **DIN (EN)** | 1.0402 (C22, C22E / C22R) | European equivalent with nearly identical properties. | | **ISO** | ISO 683-18: Type 1.0402 | International approximate equivalent. | | **GB (China)** | 20# Steel | Direct equivalent. | | **KS (Korea)** | KS S20C | Directly equivalent. | **Note:** Mechanical property specifications (e.g., minimum yield strength) may differ slightly between standards. For case-hardening applications, the equivalent grades (e.g., AISI 1020) are fully interchangeable. --- ### **5. Key Advantages & Considerations** **Advantages:** * **Excellent Formability & Weldability:** Its low carbon content makes it ideal for fabrication and joining processes. * **Good Machinability:** Can be easily machined in its supplied state, providing good surface finishes. * **Suitable for Case Hardening:** Responds well to carburizing, allowing for tailored properties (hard surface, tough core). * **Cost-Effective:** A widely available and economical material for general engineering purposes. **Considerations:** * **Low Core Strength:** Not suitable for high-stress structural applications without case hardening or use in large sections. * **Poor Hardenability:** Cannot be through-hardened (quenched and tempered) to high strength levels like medium-carbon steels (e.g., S45C). Its primary strengthening comes from cold working or case hardening. * **Corrosion Susceptibility:** Like all non-alloyed carbon steels, it requires protective coatings (painting, plating) for corrosion resistance. --- **Disclaimer:** The information provided is for general reference purposes. Actual material properties are dependent on the specific manufacturing process, heat treatment, and section size. For critical applications, especially involving heat treatment, always consult the official material data sheets and engage with qualified metallurgical engineers. -:- For detailed product information, please contact sales. -: JIS S20C Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5061 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 S20C Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS S20C Carbon Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS S20C Carbon Steel Flange -:- For detailed product information, please contact sales. -:

Packing of JIS S20C 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 1532 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