EN S275J2G3C High Manganese, Quality 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. -: EN S275J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Flange Product Information -:- For detailed product information, please contact sales. -: EN S275J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

EN S275J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Name:** EN S275J2G3C Structural Steel for Cold Forming, Normalized, Quality Grade **Overview:** EN S275J2G3C is a **specialized non-alloy structural steel** combining three critical performance attributes into one designation. It is a **fine-grained steel** supplied in the **normalized condition (G3)** with **guaranteed impact toughness at -20°C (J2)** and a **chemical composition optimized for superior cold formability (C)**. This grade is engineered for the fabrication of complex, cold-worked components that must subsequently perform reliably in low-temperature service environments (down to -20°C). The normalized condition ensures a homogeneous and stable microstructure, which is particularly beneficial for parts undergoing significant deformation. It is **not a "High Manganese" steel**; its premium is derived from its specific processing and enhanced formability. **Key International Standards:** * **Primary Standard:** **EN 10025-3:2019** - Hot rolled products of structural steels - Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels. * *Note: The "C" designation, while originating in EN 10025-2, is applied here as a supplementary requirement, implying stricter chemical limits.* * **Grade & Designation Decoding:** **S275J2G3C** * **S:** Structural Steel. * **275:** Minimum yield strength in MPa (for thickness ≤ 16mm). * **J2:** Quality designation, guaranteeing impact energy at **-20°C**. * **G3:** Supplementary designation for the **delivery condition: normalized or normalized rolled**. * **C:** Supplementary designation for **steels intended for cold forming** (requiring tighter P and S limits). * **Core Concept:** This is a **triple-qualified, premium fabrication steel**. It is designed for a specific manufacturing sequence: **Cut → Severe Cold Forming → Welding**, with the finished assembly destined for cold-climate service. * **Clarification on "High Manganese":** This is **incorrect**. The manganese content is standard for the fine-grained S275 class. Its defining features are the **normalized structure (-20°C toughness) and certified cold formability**. **Chemical Composition (Ladle Analysis, % by weight, based on EN 10025-3 for S275J2 with 'C' grade limits):** Chemistry is fine-tuned for fine grain, toughness, and ductility. * **Carbon (C):** ≤ **0.18%** (Low for excellent weldability and formability). * **Manganese (Mn):** ≤ **1.50%** (Standard range). * **Phosphorus (P):** ≤ **0.025%** (**Key Differentiator** - Tighter than standard S275J2's ≤0.030%, crucial for preventing cold cracking during forming). * **Sulphur (S):** ≤ **0.020%** (**Key Differentiator** - Tighter than standard ≤0.025%, essential for superior edge ductility and surface quality). * **Silicon (Si):** ≤ **0.50%**. * **Aluminum (Alt):** ≥ **0.020%** (Mandatory for grain refinement). * **Nitrogen (N):** ≤ **0.015%**. * **Carbon Equivalent (CEV):** Typically low (~0.35-0.40), excellent for welding formed components. **Physical & Mechanical Properties (for normalized 'G3' condition, thickness ≤ 16mm):** * **Yield Strength (ReH):** ≥ **275 MPa** (Minimum for t ≤ 16mm; thickness-dependent). * **Tensile Strength (Rm):** **410 - 560 MPa**. * **Elongation at Break (A5):** ≥ **22%** (Minimum, typically higher due to favorable structure and chemistry). * **Impact Energy (KV):** **≥ 27 J at -20°C** (Longitudinal, Charpy V-notch). The normalized, fine-grained structure ensures consistent toughness. * **Fine Grain Size:** Minimum grain size **6 or finer** (EN ISO 643). * **Cold Formability:** **Excellent.** The primary feature. The combination of a normalized, ductile microstructure and very low P/S content allows for severe cold deformation (deep drawing, tight-radius bending, complex stamping) with minimal risk of cracking. * **Density:** **~7.85 g/cm³**. **Product Features:** 1. **Uncompromised Cold Formability in a Tough Matrix:** The "C" chemistry ensures formability, while the normalized, fine-grained "J2G3" matrix provides the toughness. This eliminates the toughness compromise often faced when cold working higher-strength steels. 2. **Stable, Homogeneous Base Material:** Normalization provides a stress-relieved, uniform starting condition, leading to predictable and consistent springback and forming behavior. 3. **Excellent Weldability after Forming:** The low CEV and clean chemistry allow for reliable welding of pre-formed parts. Residual stresses from forming are also alleviated by the normalized state. 4. **Ideal for Critical Fabricated Assemblies:** Enables the production of complex, high-strength parts with guaranteed performance in cold environments. **Typical Applications:** S275J2G3C is specified for high-value, safety-critical cold-formed components in demanding sectors. * **Commercial Vehicle & Rail:** **Cold-formed structural safety components (brackets, reinforcements) for trucks, trailers, and railway cars** operating in winter conditions. * **Mobile Machinery & Cranes:** **Complex formed parts for excavator arms, crane jib sections, and access platforms** used in cold climates. * **Energy & Infrastructure:** **Formed housings, brackets, and supports for outdoor electrical switchgear, transformer covers, and wind turbine internal platforms**. * **Specialized Fabrication:** Any component where the design mandates **a complex cold-formed shape from plate material, subsequent welding, and final service at temperatures as low as -20°C**. **Available Forms & Processing:** * **Forms:** Most commonly supplied as **normalized plates** and **sheet**. * **Surface:** Often supplied as **pickled and oiled (PO)** to facilitate cold forming and provide a clean surface for welding or painting. * **Processing:** **Optimized for precision cold forming operations (stamping, press-braking) followed by welding.** Machinability is good. --- **Critical Procurement Note:** * **Must Specify Fully:** The order must clearly state **"EN 10025-3 S275J2G3C"** to obtain this specific combination of properties. * **Thickness-Strength Relationship:** Confirm the applicable minimum yield strength for the ordered thickness from EN 10025-3 tables. * **Not a Commodity:** This is a **premium, application-specific grade**. Its cost is justified by the elimination of downstream processing issues (cracking, failed impact tests) in critical applications. * **Not "High Manganese":** This term is erroneous. Correctly describe it as **"Normalized, Cold-Formable, Fine-Grained Structural Steel with -20°C Toughness."** * **Certification:** Requires a full **Inspection Certificate 3.1/3.2** per EN 10204, confirming chemistry (notably low P/S), mechanical properties, impact tests at -20°C, and grain size. -:- For detailed product information, please contact sales. -: EN S275J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5825 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. -: EN S275J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Properties -:- For detailed product information, please contact sales. -:

Applications of EN S275J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers EN S275J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Flange -:- For detailed product information, please contact sales. -:

Packing of EN S275J2G3C High Manganese, Structural, Hot Rolled, Quality 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 2296 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