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 S275JRC High Manganese, Structural, Hot Rolled, Quality Steel Flange Product Information
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EN S275JRC High Manganese, Structural, Hot Rolled, Quality Steel Flange Synonyms
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EN S275JRC High Manganese, Structural, Hot Rolled, Quality Steel Product Information
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# **Product Name:** EN S275JRC Structural Steel for Cold Forming, Hot Rolled, Base Material
**Overview:**
EN S275JRC is a **specialized non-alloy structural steel** defined under EN 10025-2, belonging to the S275 strength category. It is distinguished by the supplementary designation **"C"**, which explicitly indicates the steel is **intended for cold forming** and has a chemical composition optimized for this purpose. It provides the fundamental strength and room-temperature toughness of the base S275JR grade, but with **significantly enhanced ductility and cold workability**. This makes it the preferred choice for manufacturing components that undergo significant deformation such as bending, roll-forming, or stamping. It is **not a "High Manganese" steel**; its defining characteristic is superior formability, not elevated manganese content.
**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:** **S275JRC**
* **S:** Structural Steel.
* **275:** Minimum yield strength in MPa (for nominal thickness ≤ 16mm).
* **JR:** Base quality designation. Impact tested at **Room Temperature (+20°C)**.
* **C:** **Critical supplementary designation** for **steels intended for cold forming**. This mandates stricter chemical limits than standard S275JR.
* **Core Concept:** This is a **Base Material with a special purpose**. The "C" elevates it from a general-purpose S275JR to a fabrication-optimized grade, but it retains the basic JR toughness level (suitable only for temperatures ≥ +20°C).
* **Clarification on "High Manganese":** This is **incorrect and misleading**. S275JRC has a standard manganese range for its class. Its premium lies in **controlled chemistry for forming ("C")**, not in alloy content. The term should be avoided.
* **Common Equivalents:** No direct global equivalent exists for the EN "C" classification. It can be loosely compared to **cold-forming grades of ASTM A36 or A572 Grade 40** with supplemental bending requirements.
**Chemical Composition (Ladle Analysis, % by weight, maximum values per EN 10025-2 for 'C' grades):**
The composition is tailored for maximum ductility and reduced risk of cracking during cold work.
* **Carbon (C):** ≤ **0.20%** (Often targeted at the lower end for better formability).
* **Manganese (Mn):** ≤ **1.50%** (Standard for S275, not elevated).
* **Phosphorus (P):** ≤ **0.030%** (**Key Differentiator** - Tighter than the 0.040% limit for standard S275JR. Reduces "cold shortness").
* **Sulphur (S):** ≤ **0.030%** (**Key Differentiator** - Tighter than the 0.040% limit for standard S275JR. Improves ductility and edge formability).
* **Nitrogen (N):** ≤ **0.014%**.
* **Note:** The significantly lower maximum limits for Phosphorus and Sulphur are the defining chemical features that enable its superior cold forming performance.
**Physical & Mechanical Properties (for hot-rolled condition, thickness ≤ 16mm):**
* **Yield Strength (ReH):** ≥ **275 MPa** (Minimum for t ≤ 16mm; decreases with thickness).
* **Tensile Strength (Rm):** **410 - 560 MPa**.
* **Elongation at Break (A5):** ≥ **22%** (Minimum, typically good due to favorable chemistry).
* **Impact Energy (KV):** ≥ **27 J at +20°C** (Longitudinal, Charpy V-notch). **CRITICAL: No toughness guarantee below +20°C.**
* **Cold Formability:** **Excellent – The Primary Feature.** The steel is certified to withstand significant cold deformation (bending, roll-forming, punching, stamping) in its thickness range with a **markedly reduced risk of cracking** at the edges or in the bend zone compared to standard S275JR.
* **Density:** **~7.85 g/cm³**.
* **Modulus of Elasticity:** **210 GPa**.
**Product Features:**
1. **Optimized for Cold Forming (Primary Feature):** The "C" chemistry ensures the material can withstand severe cold bending and forming operations without failure, reducing scrap rates and enabling more complex designs.
2. **Maintained Base Strength & Weldability:** Retains the strength and excellent weldability of the S275 family. Pre-heating is generally not required for typical thicknesses.
3. **Cost-Effective for Fabrication:** While potentially slightly more expensive than standard S275JR, it can lead to overall cost savings by improving production yield and allowing for more complex formed shapes.
4. **Predictable Behavior:** Provides consistent and reliable performance during press-brake and roll-forming operations.
**Typical Applications:**
S275JRC is specified where components require significant cold working and higher strength than S235.
* **Heavy Fabrication:** **Press-braked brackets, stiffeners, chassis components, and support frames** requiring tight bend radii.
* **Construction & Architecture:** **Cold-formed structural sections (purlins, girts), connection plates, and base plates**.
* **Transportation Equipment:** **Cold-formed parts for trailer undercarriages, body supports, and container components**.
* **Storage & Material Handling:** **Roll-formed uprights and beams for heavy-duty racking and shelving systems**.
* **General Metal Fabrication:** Any part where the design involves **significant bending or forming after blanking**.
**Available Forms & Processing:**
* **Forms:** Commonly supplied as **hot-rolled sheet and strip** (in coils or cut lengths), **plates**, and **flat bars**.
* **Surface:** Typically with mill scale. Often supplied as **pickled and oiled (PO)** for critical forming applications to improve tool life and surface finish.
* **Processing:** **Ideal for shearing, punching, and especially press-brake bending and roll-forming.** Also perfectly weldable.
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**Critical Procurement Note:**
* **Must Specify "C":** It is imperative to specify the full designation **"S275JRC"**. Ordering "S275JR" will deliver standard material with higher P and S, which is more prone to cracking during aggressive forming.
* **Temperature Limitation:** Like all JR grades, it is **not suitable** for service temperatures below **0°C** under dynamic loading. For cold-formed parts in cold environments, **S275J0C** or **S275J2C** must be used.
* **Not "High Manganese":** Do not use this term. Its value proposition is **"Cold-Formable Base Structural Steel."**
* **Thickness-Strength:** Confirm the applicable minimum yield strength for the ordered thickness from EN 10025-2 tables.
* **Designation Clarification:** Some older documents or labels might use **"S275JRG1C"**, which is technically more precise (G1 = as-rolled) but **"S275JRC"** is the functionally equivalent and commonly used term.
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EN S275JRC High Manganese, Structural, Hot Rolled, Quality Steel Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5830 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 S275JRC High Manganese, Structural, Hot Rolled, Quality Steel Properties
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Applications of EN S275JRC High Manganese, Structural, Hot Rolled, Quality Steel Flange
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Chemical Identifiers EN S275JRC High Manganese, Structural, Hot Rolled, Quality Steel Flange
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Packing of EN S275JRC High Manganese, Structural, Hot Rolled, Quality 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 2301 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
