EN S235JRG2 High Manganese, Base 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 S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Flange, t>63 mm Product Information -:- For detailed product information, please contact sales. -: EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Flange, t>63 mm Synonyms -:- For detailed product information, please contact sales. -:

EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel, t>63 mm Product Information -:- For detailed product information, please contact sales. -: **Product Name:** EN S235JRG2 Structural Steel, Hot Rolled, for Heavy Thickness (t > 63 mm) **Overview:** EN S235JRG2 is a **non-alloy structural steel** specified for **extra-heavy thickness applications**, defined under the EN 10025-2 standard. The supplementary designation **"G2"** explicitly indicates that this steel grade is intended for products where the **specified minimum values of yield strength and tensile strength are not applicable** as per the standard's standard thickness tables. In practice, this primarily applies to **plates and sections with thicknesses exceeding 63 mm**, where the inherent effects of mass and slower cooling during rolling necessitate special consideration. This grade provides a standardized way to procure and specify S235JR material for these heavy sections, acknowledging its de-rated strength properties. It is **not a "High Manganese" steel**. **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 & Condition Designation:** **S235JRG2** * **S:** Structural Steel. * **235:** Nominal yield strength class. However, for "G2" products, the **minimum yield strength is NOT guaranteed to be 235 MPa**. It is subject to manufacturer's specification or customer agreement. * **JR:** Base quality designation. Impact tested at **+20°C**. * **G2:** **Critical supplementary designation** meaning: "**Steels for which the specified minimum values of yield strength and tensile strength are not applied**" (as defined in EN 10025-2, clause 8.2.2). This is essentially the standard's designation for **heavy thickness material** (typically **t > 63 mm**). * **Clarification:** This grade exists **specifically to address the property reduction in very thick sections**. The mechanical properties are not those listed in the main tables for S235JR. They must be **agreed upon at the time of enquiry and order**. * **Clarification on "High Manganese":** This is **incorrect**. S235JRG2 has the standard S235JR composition. Its unique characteristic is its formalized application to thicknesses where standard property guarantees do not hold. **Chemical Composition (Ladle Analysis, % by weight, maximum values):** Standard S235JR composition, often with stricter internal controls to ensure homogeneity in heavy sections. * **Carbon (C):** ≤ **0.17%** * **Manganese (Mn):** ≤ **1.40%** (May be controlled to a mid-range for consistency). * **Phosphorus (P):** ≤ **0.045%** * **Sulphur (S):** ≤ **0.045%** (Often specified lower, e.g., ≤0.030%, for improved through-thickness properties). * **Silicon (Si):** Used for killing to ensure sound internal structure. * **Note:** For such thicknesses, the steel is **fully killed** to minimize segregation and ensure integrity. **Physical & Mechanical Properties (for heavy thickness t > 63 mm):** ***Properties are not standard and must be contractually agreed.*** The following are **typical achievable or negotiable values**, not guarantees. * **Yield Strength (ReH):** **Approx. 215 - 225 MPa** (Typical achievable minimum, significantly lower than the nominal 235 MPa for thin sections). * **Tensile Strength (Rm):** **Approx. 340 - 470 MPa**. * **Elongation (A5):** Subject to agreement; typically ≥ **22%**. * **Impact Energy (KV):** **≥ 27 J at +20°C** (This quality requirement typically remains, but test location - e.g., 1/4 thickness - is crucial). * **Through-Thickness Properties:** Highly important. **Reduction of area in the short transverse direction (Z-direction)** should be specified (e.g., per EN 10164, quality level Z15 or Z25) to prevent lamellar tearing in heavy welded joints. * **Ultrasonic Testing (UT):** **Mandatory for quality assurance.** Supplied to standards like EN 10160 or specific customer requirements (SE 1716, ASTM A578) to ensure internal soundness. **Product Features:** 1. **For Extra-Heavy Sections:** The primary and sole purpose of the "G2" designation is to formally categorize this material for thicknesses > 63 mm. 2. **Controlled Homogeneity:** Produced with special melting, casting, and rolling practices to ensure as uniform a structure as possible through the massive cross-section. 3. **Mandatory Non-Destructive Testing:** Relies on ultrasonic inspection to verify internal quality, which is more critical than standardized tensile properties for such applications. 4. **Negotiated Properties:** Engineers must actively define the required minimum properties based on the specific design case, rather than relying on standard table values. **Typical Applications (for t > 63 mm):** Used in massive, highly loaded structural components. * **Heavy Civil Engineering:** **Base blocks for large bridge piers, massive anchorages, and thick nodes in offshore or heavy industrial structures**. * **Power Generation:** **Extremely thick sections for hydropower plant components (turbine housings), nuclear plant structural supports, and heavy machinery foundations**. * **Press & Forging Equipment:** **Frames, platens, and anvils** for giant mechanical presses and forging hammers. * **Shipbuilding:** **Rudder stocks and stern frames** for very large vessels. **Available Forms & Quality Supplements:** * **Forms:** Exclusively **extra-heavy rolled plates** and **forged slabs or blocks**. Not available as standard sections. * **Delivery Condition:** **As-rolled, normalized, or stress-relieved**, depending on the order and thickness. * **Mandatory Supplements:** **Ultrasonic Testing Certificate.** Chemical analysis from top and bottom of the ingot. Mechanical tests from defined locations (often 1/4 thickness). --- **Critical Procurement & Design Note:** 1. **"G2" Means Negotiated Properties:** Purchasing S235JRG2 **without agreed mechanical property values is incorrect**. The inquiry must state the **required minimum Yield Strength, Tensile Strength, and Elongation** for the specific thickness. 2. **Not "High Manganese":** This term is irrelevant. The challenge is **property retention in thick sections**, not alloying. 3. **Design Responsibility:** The structural designer must use the **agreed-upon, lower strength values** in calculations. Assuming 235 MPa yield strength is a serious error. 4. **Specification:** A complete order will read something like: "EN 10025-2 S235JRG2, t=100mm, Min ReH ≥ 220 MPa, Min Rm ≥ 360 MPa, with UT inspection per EN 10160, Class S2E2, and Z25 quality per EN 10164." -:- For detailed product information, please contact sales. -: EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel, t>63 mm Specification Dimensions Size： Diameter 20-1000 mm Length <5817 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 S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel, t>63 mm Properties -:- For detailed product information, please contact sales. -:

Applications of EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Flange, t>63 mm -:- For detailed product information, please contact sales. -: Chemical Identifiers EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Flange, t>63 mm -:- For detailed product information, please contact sales. -:

Packing of EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Flange, t>63 mm -:- 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 2288 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