EN S235J2G4C 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 S235J2G4C High Manganese, Structural, Hot Rolled, Quality Steel Flange Product Information -:- For detailed product information, please contact sales. -: EN S235J2G4C High Manganese, Structural, Hot Rolled, Quality Steel Flange Synonyms -:- For detailed product information, please contact sales. -:

EN S235J2G4C High Manganese, Structural, Hot Rolled, Quality Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** EN S235J2G4C Structural Steel for Cold Forming, Thermomechanically Rolled **Overview:** EN S235J2G4C is a **specialized non-alloy structural steel** that integrates three critical performance attributes into one designation: **guaranteed low-temperature toughness (-20°C), a thermomechanically rolled (TM) microstructure for enhanced properties, and a chemical composition optimized for superior cold formability.** The "C" suffix explicitly designates it as **steel intended for cold forming**. Supplied in the thermomechanically rolled condition, this grade represents a high-performance, fabrication-oriented material for components that undergo significant cold working and must operate reliably in cold environments. It is **not a "High Manganese" steel**; its premium is derived from its advanced processing route and formability. **Key International Standards:** * **Primary Standard:** **EN 10025-2:2019** - Hot rolled products of structural steels - Part 2: Technical delivery conditions for non-alloy structural steels. * **Grade & Designation Decoding:** **S235J2G4C** * **S:** Structural Steel. * **235:** Minimum yield strength in MPa (for thickness ≤ 16mm). * **J2:** Quality designation, guaranteeing impact energy at **-20°C**. * **G4:** Supplementary designation for the **delivery condition: thermomechanically rolled (TM)**. * **C:** Supplementary designation for **steels intended for cold forming**. * **Core Concept:** This is a **triple-qualified, application-specific steel**. The "G4C" combination mandates: 1. A thermomechanically controlled process for a fine-grained, tough microstructure. 2. A chemical composition with tighter limits on phosphorus and sulphur to maximize cold formability. * **Clarification:** The term **"High Manganese" is a misnomer**. The "C" grade typically has controlled, not elevated, manganese content. Its value lies in the **TM process + formability chemistry**, not high Mn. **Chemical Composition (Ladle Analysis, % by weight, maximum values per EN 10025-2 for 'C' grades):** Chemistry is fine-tuned for the TM process and cold forming. * **Carbon (C):** ≤ **0.17%** (Often at the lower end to aid formability and weldability). * **Manganese (Mn):** ≤ **1.40%** (Controlled, not elevated). * **Phosphorus (P):** ≤ **0.030%** (Tighter than standard S235J2's ≤0.035%. Critical for reducing "cold shortness" during forming). * **Sulphur (S):** ≤ **0.030%** (Tighter than standard ≤0.035%. Improves ductility and reduces risk of cracking). * **Nitrogen (N):** Controlled. * **Microalloys (Nb, Ti):** Often added in minute quantities (e.g., Nb ≤ 0.05%) to enable effective grain refinement during the TM process. **Physical & Mechanical Properties (for thermomechanically rolled 'G4' condition, thickness ≤ 16mm):** * **Yield Strength (ReH):** ≥ **235 MPa** (Minimum, thickness-dependent. The TM process often yields strength at the upper end of the S235 range, providing a performance margin). * **Tensile Strength (Rm):** **360 - 510 MPa**. * **Elongation at Break (A5):** ≥ **26%** (Minimum, typically good due to fine TM microstructure and "C" chemistry). * **Impact Energy (KV):** **≥ 27 J at -20°C** (Longitudinal, Charpy V-notch). The fine grain structure from TM rolling provides excellent low-temperature toughness. * **Cold Formability:** **Excellent.** The primary feature. The combination of fine, uniform TM microstructure and low P/S content allows for severe cold deformation (tight-radius bending, roll-forming, stamping) with minimal risk of cracking or edge failure. * **Microstructure:** Very fine-grained ferrite-pearlite structure with a uniform dispersion, resulting from controlled rolling in the austenite non-recrystallization region. Provides isotropic forming behavior. * **Density:** **~7.85 g/cm³**. **Product Features:** 1. **Superior Cold Formability (Primary Feature):** The "C" chemistry (low P/S) combined with a fine, ductile TM microstructure makes it exceptionally resistant to cracking during aggressive cold forming operations. 2. **Enhanced Toughness from TM Process (G4):** Thermomechanical rolling delivers a finer grain size than conventional hot rolling, providing superior impact toughness at **-20°C** and better overall property consistency. 3. **Good Weldability (with Controlled Procedures):** Low carbon ensures good weldability. However, the TM microstructure is sensitive to high heat input, which can coarsen grains in the Heat-Affected Zone (HAZ). Medium-low heat input procedures are recommended. 4. **No Post-Rolling Heat Treatment:** Properties are achieved in-line, making it a cost-effective option for high-performance forming applications. **Typical Applications:** S235J2G4C is specified for complex, cold-formed components destined for low-temperature service where material consistency is critical. * **Automotive & Transport Safety Components:** **Cold-formed structural brackets, seat frame elements, and chassis reinforcements** for vehicles in cold climates. * **Construction & Architecture:** **Complex cold-rolled profiles for curtain walls, roof systems, and cladding supports** in buildings exposed to winter conditions. * **Material Handling & Storage:** Critical **cold-formed parts for high-strength shelving systems, racking uprights, and conveyor guides** in unheated logistics centers. * **Energy & Infrastructure:** **Brackets, connectors, and housings** for outdoor electrical or telecommunications equipment requiring both formability and cold-region toughness. **Available Forms & Processing:** * **Forms:** Most commonly supplied as **thermomechanically rolled sheet, strip (in coils), and plate**. Ideal as feedstock for modern roll-forming and stamping lines. * **Surface:** Often supplied as **pickled and oiled (PO)** or with a specialized coating to facilitate cold forming and protect against corrosion during storage. * **Processing:** **Optimized for severe cold forming followed by welding.** Fabricators must balance welding parameters to maintain HAZ toughness. --- **Critical Procurement Note:** The designation **S235J2G4C** is highly specific. Ordering **S235J2G4** (without C) delivers TM steel but **not** the optimized cold-forming chemistry. This is a **premium grade for demanding fabrication**. The term **"High Manganese" is incorrect**; its key features are **enhanced cold formability ("C"), guaranteed -20°C toughness ("J2"), and a modern thermomechanically rolled structure ("G4")**. For applications not involving severe cold work, S235J2G4 is sufficient. For higher strength with similar characteristics, explore **S355MC** (a cold-forming microalloyed TM steel). Always confirm thickness-dependent mechanical property guarantees. -:- For detailed product information, please contact sales. -: EN S235J2G4C High Manganese, Structural, Hot Rolled, Quality Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5810 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 S235J2G4C High Manganese, Structural, Hot Rolled, Quality Steel Properties -:- For detailed product information, please contact sales. -:

Applications of EN S235J2G4C High Manganese, Structural, Hot Rolled, Quality Steel Flange -:- For detailed product information, please contact sales. -: Chemical Identifiers EN S235J2G4C High Manganese, Structural, Hot Rolled, Quality Steel Flange -:- For detailed product information, please contact sales. -:

Packing of EN S235J2G4C 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 2281 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