JIS SWRCH20K 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 SWRCH20K Carbon Steel Flange Product Information -:- For detailed product information, please contact sales. -: JIS SWRCH20K Carbon Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

JIS SWRCH20K Carbon Steel Product Information -:- For detailed product information, please contact sales. -: ## **Product Introduction: JIS SWRCH20K High-Quality Cold Heading Carbon Steel** **JIS SWRCH20K** is a **premium-quality cold forging/heading carbon steel** wire rod specified by the Japanese Industrial Standards (JIS) system. The designation follows the SWRCH series (**S**teel **W**ire Rod for **C**old **H**eading), with "20" indicating the nominal carbon content (0.20%) and the critical suffix **"K"** denoting **Special Quality with Guaranteed Hardenability**. This grade is engineered for demanding cold forming applications where components will undergo **subsequent carburizing or case-hardening heat treatment**. It combines the exceptional cold formability of the SWRCH series with tightly controlled chemistry that ensures predictable and consistent response to carburizing, resulting in a deep, hard wear-resistant surface and a tough, strong core. It is the material of choice for high-performance, safety-critical fasteners and mechanical parts. --- ### **1. Chemical Composition (JIS G 3507-1 Standard)** The composition is controlled with much stricter tolerances than the standard "A" grade, particularly regarding hardenability-influencing elements. Key specifications are as follows (in weight %): | Element | Carbon (C) | Silicon (Si) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Chromium (Cr)* | **Key Distinction from SWRCH20A** | | :------------- | :--------- | :----------- | :------------- | :------------- | :--------- | :------------- | :-------------------------------- | | **SWRCH20K** | 0.18-0.23 | 0.15-0.35 | **0.60-0.90** | **≤ 0.025** | **≤ 0.025** | ≤ 0.20 | Higher Si & Mn, Lower P & S, Guaranteed Hardenability. | | *SWRCH20A* | 0.18-0.23 | **≤ 0.10** | 0.30-0.60 | ≤ 0.030 | 0.040-0.070| - | Standard formability grade. | **Critical Features of the Composition:** * **Higher Manganese (Mn) and Controlled Silicon (Si):** These elements are essential for **hardenability**. The "K" grade has significantly higher and controlled ranges to ensure a guaranteed hardenability band, leading to consistent case depth and core strength after carburizing and quenching. * **Very Low Phosphorus (P) & Sulfur (S):** Impurity levels are minimized (**≤ 0.025%**) to maximize **core toughness, ductility, and fatigue strength**. This is critical for parts subjected to impact and cyclic loading. * **Hardenability Band:** Like the SxxCK series, SWRCH20K is supplied with a guaranteed hardenability range (e.g., JIS H-band), ensuring predictable heat treatment results across different production batches and part sections. --- ### **2. Physical & Mechanical Properties** Properties are evaluated in both the **supplied (spheroidize-annealed) condition** for forming and the **final case-hardened state**. **A. Supplied (Spheroidize Annealed) Condition:** * **Hardness:** **75 - 85 HRB** (Slightly higher than SWRCH20A due to higher Mn/Si, but still excellent for cold forming). * **Tensile Strength (σb):** ~ 420 - 520 MPa. * **Yield Strength (σ0.2):** ~ 310 - 380 MPa. * **Elongation (δ):** ≥ 30% (Maintains high ductility for cold forging). * **Microstructure:** Fine spheroidized cementite in ferrite, optimized for deformation and subsequent heat treatment response. **B. After Carburizing, Quenching & Tempering:** * **Surface (Case) Hardness:** **58 - 64 HRC** (High surface wear resistance). * **Core Hardness:** **28 - 42 HRC** (Provides strong mechanical support for the hard case, resistant to crushing). * **Core Tensile Strength:** Can achieve 900 - 1200 MPa range after proper heat treatment. * **Core Toughness:** Excellent impact and fatigue resistance due to low impurity levels and fine grain structure. --- ### **3. Product Applications** JIS SWRCH20K is specified for **high-strength, case-hardened components** manufactured via cold forging, where reliability and performance under stress are paramount. * **Automotive Safety & Drivetrain Components:** **High-strength flanged bolts, wheel studs, cylinder head bolts, gearbox shafts, synchronizer hubs, and differential pins.** * **High-Performance Fasteners:** **Property Class 10.9 and 12.9 bolts and screws** that require carburizing for added fatigue and wear resistance. * **Critical Mechanical Parts:** Cold-formed gears, cam lobes, bearing races, and injection pump components. * **Aerospace & Heavy-Duty Equipment:** Special bolts, pins, and linkage parts requiring the optimal combination of formability and final hardened properties. --- ### **4. International & Equivalent Standards** The "K" suffix aligns with international special-quality steels with guaranteed hardenability, particularly in cold heading wire forms. | Standard System | Equivalent / Comparable Grade | Condition / Remark | | :-------------- | :---------------------------- | :----------------- | | **JIS** | **SWRCH20K** | Primary standard (JIS G 3507-1). The "K" is key. | | **ASTM/AISI/SAE** | **10B21H** | The most direct functional equivalent. A boron-treated steel with similar carbon and guaranteed hardenability for cold heading and carburizing. | | **DIN (EN)** | EN 10263-4: **20MnB4** | European cold heading steel with boron for hardenability, designed for case hardening. | | **ISO** | ISO 4954: **Type CH20K** | Designation for cold heading steels with guaranteed hardenability. | | **GB (China)** | **ML20Cr** (or ML20BH) | Chinese cold heading ("ML") steel, often with chromium or boron for hardenability. | **Critical Distinction:** While standard cold heading grades (SWRCH20A, 1018, 1022) may have similar carbon content, **SWRCH20K is fundamentally different due to its hardenability guarantee.** For critical case-hardened components, specifying the "K" grade or its equivalents (like 10B21H/20MnB4) is mandatory to ensure part performance and safety. --- ### **5. Key Advantages & Considerations** **Advantages:** * **Optimal Property Combination:** Unites superior cold formability with excellent and predictable post-carburizing mechanical properties. * **Guaranteed Hardenability:** Ensures consistent case depth and core strength, vital for part-to-part uniformity in mass production. * **High Core Purity:** Low P and S content yield superior core toughness and fatigue life compared to standard cold heading grades. * **Production Efficiency:** Enables the high-volume manufacturing of complex, high-strength parts via cold forging with reliable final heat treatment. **Considerations:** * **Higher Cost:** Premium over standard SWRCH"A" grades due to tighter chemical controls and hardenability testing. * **Specific Application:** Over-specified for components not requiring case hardening. SWRCH20A is more cost-effective for through-hardened or non-heat-treated parts. * **Process Complexity:** Requires precise control of both cold forming and the subsequent carburizing/quenching/tempering processes to realize its full potential. --- **Disclaimer:** The information provided is for general reference and selection purposes. For engineering design, manufacturing, and heat treatment specification of critical components, always consult the official material data sheets from the steel producer and engage with qualified metallurgical and heat treatment engineers. Final part properties are highly dependent on the specific process parameters used. -:- For detailed product information, please contact sales. -: JIS SWRCH20K Carbon Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5064 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 SWRCH20K Carbon Steel Properties -:- For detailed product information, please contact sales. -:

Applications of JIS SWRCH20K Carbon Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers JIS SWRCH20K Carbon Steel Flange -:- For detailed product information, please contact sales. -:

Packing of JIS SWRCH20K 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 1535 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