JIS SWRCH20A 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 SWRCH20A Carbon Steel Flange Product Information -:- For detailed product information, please contact sales. -: JIS SWRCH20A Carbon Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

JIS SWRCH20A Carbon Steel Product Information -:- For detailed product information, please contact sales. -: ## **Product Introduction: JIS SWRCH20A Cold Heading Quality Carbon Steel** **JIS SWRCH20A** is a **special cold forging/heading quality carbon steel** wire rod specified by the Japanese Industrial Standards (JIS) system. The designation "SWRCH" stands for **S**teel **W**ire Rod for **C**old **H**eading, with the "A" suffix (Standard Grade) and "20" indicating a nominal carbon content of 0.20%. This grade is engineered specifically for **cold forming processes** such as heading, extrusion, and upsetting. Its chemical composition and production process are optimized to provide excellent ductility, low surface defect rates, and consistent workability under high-strain cold deformation. It is commonly supplied in spheroidized annealed condition to maximize formability, allowing for the production of high-strength, net-shape fasteners and components without the need for intermediate annealing. --- ### **1. Chemical Composition (JIS G 3507-1 Standard)** The composition is precisely controlled to ensure optimal cold forging performance, minimizing risks of cracking or surface flaws. Key elements are as follows (in weight %): | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | | :------------- | :--------- | :----------- | :------------- | :------------- | :--------- | | **Content (SWRCH20A)** | 0.18-0.23 | ≤ 0.10 | 0.30-0.60 | ≤ 0.030 | **0.040-0.070** | | *Key Feature* | Balanced for strength & formability | **Intentionally Low** to prevent work-hardening and tool wear | Standard range for ductility | Controlled as low as possible | **Controlled Addition** to improve machinability in certain applications. | **Critical Features of the Composition:** * **Low Silicon (Si):** This is a defining characteristic of cold heading steels. Silicon is a potent ferrite strengthener, and its low level (<0.10%) is critical for achieving maximum **softness and ductility**, reducing deformation resistance and die wear during cold forging. * **Sulfur (S) Control:** Sulfur is maintained within a controlled, slightly elevated range (compared to structural steels) to form manganese sulfide (MnS) inclusions. These inclusions can improve **machinability** in secondary operations, but their size and distribution are carefully managed to avoid detrimental effects on transverse properties. * **Cleanliness:** Steelmaking practices for SWRCH grades emphasize high internal and surface cleanliness to prevent seams or inclusions that could lead to failure during forming. --- ### **2. Physical & Mechanical Properties** Properties are primarily defined in the **supplied (spheroidize-annealed) condition**, which is essential for cold heading. **A. Supplied (Spheroidize Annealed) Condition:** * **Hardness:** **≤ 84 HRB** (Typical range: 70-80 HRB). This low hardness is crucial for successful cold forming. * **Tensile Strength (σb):** ~ 400 - 500 MPa (approximate, hardness is the primary control). * **Yield Strength (σ0.2):** ~ 300 - 350 MPa (approximate). * **Elongation (δ):** ≥ 35% (Excellent ductility is a key requirement). * **Microstructure:** **Spheroidized cementite** in a ferritic matrix, providing the optimal structure for high plastic deformation. **B. After Cold Forming and Heat Treatment (e.g., for Fasteners):** * Parts are often **strain-hardened** during forming. * **Final Properties:** Typically achieved via **quenching and tempering** after forming to meet specified mechanical grades (e.g., ISO 898-1 Class 8.8, 10.9). * **Example (for a Class 8.8 bolt):** * Tensile Strength: 800 - 1000 MPa * Yield Strength (Proof Stress): ≥ 640 MPa --- ### **3. Product Applications** JIS SWRCH20A is the fundamental raw material for a vast array of **cold-forged components**, especially in high-volume manufacturing. * **Standard & High-Strength Fasteners:** **Bolts, screws, nuts, studs, and rivets** (commonly heat-treated to Grade 8.8, 10.9). * **Automotive Components:** Various pins, shafts, small gears, and complex-shaped parts produced via cold extrusion. * **Electrical & Hardware:** Screws, nails, and other hardware items. * **General Engineering Parts:** Any symmetrical or axisymmetric part where cold forging offers economic and performance benefits over machining. --- ### **4. International & Equivalent Standards** The SWRCH series has direct functional equivalents in other standards focused on cold heading/wire rod quality. | Standard System | Equivalent / Comparable Grade | Condition / Remark | | :-------------- | :---------------------------- | :----------------- | | **JIS** | **SWRCH20A** | Primary standard (JIS G 3507-1) for basic cold heading quality. | | **ASTM/AISI** | **C1018 / C1020 (Wire Rod Quality)** | Similar carbon content. The key is to specify "cold heading quality" or "rod for forging." | | **SAE** | SAE 1018, SAE 1020 | | | **DIN (EN)** | EN 10263-4: 1C22 | European standard for cold heading and cold extrusion steel. | | **ISO** | ISO 4954: Type CF20 | "CF" denotes steels for cold forging. | | **GB (China)** | ML20 (or SWRCH20A) | "ML" denotes cold heading steel. | **Crucial Note:** Direct equivalence is based on **application purpose (cold heading)** rather than exact chemistry. The **low silicon (<0.10%)** is the critical identifier for cold heading quality. When sourcing, specifying the **JIS SWRCH designation or "Cold Heading Quality"** is more important than just the carbon grade. --- ### **5. Key Advantages & Considerations** **Advantages:** * **Superior Cold Formability:** Optimized chemistry and microstructure allow for severe deformation without cracking. * **High Production Efficiency:** Enables high-speed, net-shape manufacturing with minimal material waste. * **Good Surface Quality:** Produced with strict controls to ensure a surface suitable for demanding cold forging. * **Wide Availability:** A fundamental and widely produced grade in the global fastener and cold forging industry. **Considerations:** * **Not for Direct Use:** Requires subsequent cold forming and usually heat treatment to achieve final mechanical properties. * **Limited Weldability:** The controlled sulfur content and intended use make it generally unsuitable for welding. * **Lower Strength in Annealed State:** Its value is in its formability; strength is imparted later through work-hardening and heat treatment. --- **Disclaimer:** The information provided is for general reference and selection purposes. For engineering design and manufacturing process specification, always consult the official material data sheets from the steel producer. The performance of the final part is dependent on the specific cold forming process, heat treatment parameters, and part design. -:- For detailed product information, please contact sales. -: JIS SWRCH20A Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5063 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 SWRCH20A Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS SWRCH20A Carbon Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS SWRCH20A Carbon Steel Flange -:- For detailed product information, please contact sales. -:

Packing of JIS SWRCH20A 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 1534 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