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 S235J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Flange Product Information
-:-
For detailed product information, please contact sales.
-:
EN S235J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Flange Synonyms
-:-
For detailed product information, please contact sales.
-:
EN S235J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Product Information
-:-
For detailed product information, please contact sales.
-:
**Product Name:** EN S235J2G3C Structural Steel for Cold Forming, Hot Rolled, Normalized
**Overview:**
EN S235J2G3C is a specialized **non-alloy structural steel** that combines three key performance characteristics: **guaranteed low-temperature toughness (-20°C), a normalized microstructure for homogeneity, and optimized chemical composition for superior cold formability.** The "C" suffix explicitly denotes its primary purpose: **steel intended for cold forming**. It is supplied in the hot-rolled and subsequently normalized condition. This grade represents a high-quality, fabrication-friendly option for critical components that require significant cold working and must perform reliably in cold environments. It is **not a "High Manganese" steel**; its defining attributes are its processing condition and formability, not an 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:** **S235J2G3C**
* **S:** Structural Steel.
* **235:** 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**.
* **Core Concept:** This is a **specialized, dual-qualified steel**. The "G3C" combination mandates:
1. A normalized state for uniform properties.
2. A chemical composition with tighter limits on carbon, phosphorus, and sulphur specifically to enhance cold formability.
* **Clarification:** The term **"High Manganese" is incorrect**. The "C" grade typically has a manganese content comparable to or slightly lower than standard grades to aid formability, not increase strength.
**Chemical Composition (Ladle Analysis, % by weight, maximum values per EN 10025-2 for 'C' grades):**
Stricter limits than standard S235J2 to prevent cracking during cold work.
* **Carbon (C):** ≤ **0.17%** (Often targeted to be on the lower side of this limit).
* **Manganese (Mn):** ≤ **1.40%** (Not elevated; may be controlled to a narrower range).
* **Phosphorus (P):** ≤ **0.030%** (Tighter than the standard ≤0.035% for J2, reduces cold shortness).
* **Sulphur (S):** ≤ **0.030%** (Tighter than the standard ≤0.035% for J2, improves ductility and surface quality for forming).
* **Nitrogen (N):** ≤ **0.012%**.
* **Note:** The combined reduction of P and S is the critical chemical differentiator that defines its superior cold formability.
**Physical & Mechanical Properties (for normalized 'G3' condition, thickness ≤ 16mm):**
* **Yield Strength (ReH):** ≥ **235 MPa** (Minimum, thickness-dependent. Normalizing often results in values at the lower end of the range, which is beneficial for cold forming).
* **Tensile Strength (Rm):** **360 - 510 MPa**.
* **Elongation at Break (A5):** ≥ **26%** (Minimum, typically higher in practice due to the favorable normalized structure and "C" grade chemistry).
* **Impact Energy (KV):** **≥ 27 J at -20°C** (Longitudinal, Charpy V-notch). The normalized condition ensures this toughness is consistent through the thickness.
* **Cold Formability:** **Excellent.** This is the primary feature. The steel is certified to withstand severe cold deformation (e.g., tight-radius bending, roll-forming, deep drawing) without cracking. Minimum bend radii are typically smaller than for non-"C" grades of the same strength.
* **Microstructure:** Uniform, fine-grained ferrite-pearlite structure from normalizing, providing isotropic forming behavior.
* **Density:** **~7.85 g/cm³**.
**Product Features:**
1. **Exceptional Cold Formability (Primary Feature):** The "C" designation ensures the steel is chemically optimized to withstand demanding cold forming operations without failure, reducing scrap rates in fabrication.
2. **Guaranteed Low-Temperature Toughness:** The **J2** quality provides reliable impact resistance down to **-20°C**, making finished components suitable for cold climate service.
3. **Normalized Homogeneity (G3):** The normalized condition ensures uniform mechanical properties throughout the material, eliminates rolling-induced stresses, and provides predictable, consistent behavior during forming and welding.
4. **Excellent Weldability:** Very low carbon equivalent allows for easy welding with all standard methods.
**Typical Applications:**
S235J2G3C is specified for complex, cold-formed components that will be used in low-temperature environments.
* **Cold-Formed Safety Components:** **Brackets, connectors, and reinforcements** in vehicle chassis or structural frames for use in cold climates.
* **Architectural & Construction Elements:** Complex **cold-formed sections for facades, curtain walls, and roofing systems** in cold regions where material toughness is mandated.
* **Specialized Storage & Handling:** Critical **cold-rolled profiles for heavy-duty racking systems** in unheated warehouses.
* **General Fabrication:** Any component requiring **both a tight cold-formed shape and certified -20°C impact toughness**, such as protective guards, housings, or supports for outdoor machinery.
**Available Forms & Processing:**
* **Forms:** Most commonly supplied as **normalized plates and hot-rolled strip/sheet** (often in coils), which serve as feedstock for cold-rolling mills.
* **Surface:** May be supplied with mill scale from normalizing, or as **pickled and oiled (PO)** for optimal cold forming performance and tool life.
* **Processing:** **Uniquely suited for severe cold forming operations followed by welding.** It is the ideal choice when fabrication involves significant bending or rolling prior to assembly.
---
**Critical Procurement Note:**
The designation **S235J2G3C** is highly specific. Ordering **S235J2G3** (without the C) will deliver normalized steel with -20°C toughness but **not** the optimized chemistry for cold forming, risking cracking during aggressive forming. This is a **premium, application-specific grade**. For projects not involving severe cold work, S235J2 or S235J2G3 may be more economical. **"High Manganese" is a misnomer;** this steel's premium is paid for **enhanced cold formability and guaranteed low-temperature toughness in a normalized state**. Always verify the applicable mechanical property values for the ordered thickness.
-:-
For detailed product information, please contact sales.
-:
EN S235J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5808 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 S235J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Properties
-:-
For detailed product information, please contact sales.
-:
Applications of EN S235J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Flange
-:-
For detailed product information, please contact sales.
-:
Chemical Identifiers EN S235J2G3C High Manganese, Structural, Hot Rolled, Quality Steel Flange
-:-
For detailed product information, please contact sales.
-:
Packing of EN S235J2G3C 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 2279 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
