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."
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EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Flange Product Information
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EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Flange Synonyms
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EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Product Information
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# **Product Name:** EN S275JR Structural Steel, Hot Rolled, Base Material
**Overview:**
EN S275JR is the **standard non-alloy structural steel** within the S275 strength category, defined as a **base material** under the EN 10025-2 standard. The "JR" designation indicates the **basic quality level**, with impact properties verified at room temperature (+20°C). It is a fundamental, cost-effective engineering material offering a balanced combination of adequate strength, excellent weldability, and good formability in the hot-rolled condition. It is critical to clarify that **S275JR is NOT classified as a "High Manganese" steel**; it is a standard carbon-manganese steel with typical manganese levels for its strength class. The term "High Manganese" is a misnomer and should not be applied to this grade.
**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 & Quality Designation:** **S275JR**
* **S:** Structural Steel.
* **275:** Minimum yield strength (ReH) in MPa for nominal thickness **≤ 16 mm**. This value decreases for greater thicknesses as per standard tables.
* **JR:** Basic quality designation. **'J'** signifies the steel is impact tested, and **'R'** denotes the test temperature is **Room Temperature (+20°C)**.
* **Clarification on "High Manganese":** This is an **incorrect and misleading classification**. The permissible manganese content for S275JR (≤1.50%) is standard for this strength class and is not considered "high" in a technical or specialized sense. Its properties are those of a general-purpose base steel.
* **Common International Equivalents:**
* **ASTM:** **A36** (the most common general-purpose equivalent, though chemistry differs).
* **JIS:** **SM400A**.
* **GB/T:** **Q275B**.
* **ISO:** **ISO 630-2:2021, Grade E275**.
**Chemical Composition (Ladle Analysis, % by weight, maximum values per EN 10025-2):**
Standard composition designed for manufacturability and cost-efficiency.
* **Carbon (C):** ≤ **0.21%**
* **Manganese (Mn):** ≤ **1.50%** (This is the standard upper limit for the S275 class, not a specially elevated "high" level).
* **Phosphorus (P):** ≤ **0.040%**
* **Sulphur (S):** ≤ **0.040%**
* **Nitrogen (N):** ≤ **0.014%** (for killed steel, common for thicker products).
* **Note:** For thinner products (e.g., sheet), it may be supplied as rimming steel.
**Physical & Mechanical Properties (for hot-rolled condition, nominal for thickness ≤ 16 mm):**
* **Yield Strength (ReH):** ≥ **275 MPa** (Highest guaranteed value, applicable only for t ≤ 16 mm).
* **Tensile Strength (Rm):** **410 - 560 MPa**.
* **Elongation at Break (A5):** ≥ **22%** (Minimum, longitudinal test piece).
* **Impact Energy (KV):** ≥ **27 J at +20°C** (Longitudinal, Charpy V-notch). **CRITICAL LIMITATION:** This grade has **no guaranteed impact properties below +20°C**. It is not suitable for low-temperature service without specific engineering assessment.
* **Density:** **7.85 g/cm³**.
* **Modulus of Elasticity:** **210 GPa**.
* **Poisson's Ratio:** **0.3**.
**Product Features:**
1. **Cost-Effectiveness:** The most economical grade within the S275 strength category, providing a good balance of properties for a vast array of applications.
2. **Excellent Weldability:** Low carbon equivalent allows for easy welding with all common processes (SMAW, MAG/MIG, SAW) without pre-heating requirements for most thicknesses and joint types.
3. **Good Formability:** Suitable for cold bending, shearing, and punching operations.
4. **Proven Reliability:** A globally recognized and trusted material with well-understood behavior, widely available in numerous forms.
**Typical Applications:**
S275JR is used in a wide range of general structural applications where specific low-temperature toughness is not a requirement.
* **General Construction:** Beams, columns, bracings, and plates in commercial buildings, industrial halls, and warehouses in temperate climates.
* **General Fabrication:** Machine frames, guards, platforms, staircases, non-critical brackets, and supports.
* **Transportation:** Chassis components for trailers, body frames for trucks, and non-structural parts.
* **Storage & Furniture:** Shelving units, storage rack components, and industrial furniture.
* **Infrastructure:** Fencing, simple supports, and non-load bearing architectural elements.
**Available Forms & Processing:**
* **Forms:** Hot-rolled sheets, plates, strips, bars (round, flat, square), and all common structural sections (IPE/HEA beams, UNP channels, angles).
* **Surface:** Typically with mill scale. Can be shot blasted or primed upon request.
* **Processing:** Ideal for shearing, punching, plasma/laser cutting, drilling, welding, and cold bending.
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**Critical Selection & Procurement Note:**
* **Temperature Limitation (Most Important):** The **JR quality is unsuitable for applications where the service temperature can fall below 0°C**, especially under dynamic or impact loads. For such applications, **S275J0 (0°C)** or **S275J2 (-20°C)** must be specified.
* **Thickness-Strength Relationship:** The guaranteed minimum yield strength of **275 MPa applies only to thickness ≤ 16 mm**. For thicker material, the minimum yield strength is reduced (e.g., ≥265 MPa for t > 40mm ≤ 63mm). Always use the correct value for the product thickness in design calculations.
* **Correct Terminology:** **DO NOT use the term "High Manganese Steel."** The correct and only accurate description is **"Non-Alloy Base Structural Steel, Grade S275JR."**
* **Specification:** For most purposes, specifying **"S275JR"** is sufficient. For critical applications, confirming the supply of "killed steel" may be advisable to ensure better internal soundness for welding.
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EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5829 mm
Size:We can customized as required
Standard：
Per your request or drawing
We can customized as required
Properties（Theoretical）
Chemical Composition
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EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Properties
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Applications of EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Flange
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Chemical Identifiers EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Flange
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Packing of EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Flange
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Standard Packing:
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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 2300 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
