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 SA355J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Flange Product Information
-:-
For detailed product information, please contact sales.
-:
EN SA355J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Flange Synonyms
-:-
For detailed product information, please contact sales.
-:
EN SA355J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Product Information
-:-
For detailed product information, please contact sales.
-:
# **Product Name:** EN S355J2G3 Structural Steel, Normalized, Quality Grade (Note: Corrected Designation)
**Overview**
**EN SA355J2G3 is a non-standard designation.** The correct and standard designation for this material is **EN S355J2G3** (or **S355J2+N**), as defined in EN 10025-3. It is a **non-alloy, fine-grained structural quality steel** supplied in the **normalized condition (G3/N)** with **guaranteed impact toughness at -20°C (J2)**. The "A" prefix in the requested designation ("SA") is atypical and likely erroneous; it may be a historical carryover, a project-specific code, or a misinterpretation. This grade is engineered for critical applications where a homogeneous, stress-relieved microstructure and reliable low-temperature performance are essential. It is **not a "High Manganese" steel**; its properties are derived from fine grain practice and heat treatment.
**Key International Standards & Correction**
* **Primary Standard:** **EN 10025-3:2019** - Hot rolled products of structural steels - Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine grain structural steels.
* **Correct Standard Designation:** **S355J2G3** or **S355J2+N**
* **S:** Structural Steel.
* **355:** Minimum yield strength (ReH) in MPa for thickness ≤ 16 mm.
* **J2:** Quality designation for impact testing at **-20°C**.
* **G3/N:** Delivery condition: **Normalized**.
* **Interpretation of "SA" Prefix:** If encountered, "SA" could ambiguously imply "Steel, Alloy" (unlikely as it's non-alloy) or, more plausibly, denote a **project-specific or purchaser's supplemental requirement** (e.g., additional testing, restricted chemistry). **For procurement, the standard designation "S355J2G3" must be used and clarified with the supplier if "SA" appears on legacy drawings.**
* **Clarification on "High Manganese":** This is **incorrect**. The manganese content is standard for fine-grained S355 steels. The key features are its **normalized delivery condition and guaranteed -20°C toughness**.
**Chemical Composition (Ladle Analysis, % by weight, max. values per EN 10025-3 for S355J2)**
* **Carbon (C):** ≤ **0.18%**
* **Manganese (Mn):** ≤ **1.60%**
* **Phosphorus (P):** ≤ **0.030%**
* **Sulphur (S):** ≤ **0.025%**
* **Silicon (Si):** ≤ **0.55%**
* **Aluminum (Alt):** ≥ **0.020%** (for grain refinement)
* **Nitrogen (N):** ≤ **0.015%**
* **Carbon Equivalent (CEV):** ~0.38-0.42%
**Physical & Mechanical Properties (for normalized condition, thickness ≤ 16mm)**
* **Yield Strength (ReH):** ≥ **355 MPa**
* **Tensile Strength (Rm):** **470 - 630 MPa**
* **Elongation (A5):** ≥ **21%**
* **Impact Energy (KV):** **≥ 27 J at -20°C** (Longitudinal)
* **Fine Grain Size:** ≥ **6** (ASTM scale, EN ISO 643)
* **Density:** **~7.85 g/cm³**
* **Modulus of Elasticity:** **210 GPa**
**Product Features**
1. **Homogeneous Normalized Structure:** Provides uniform properties, relieved internal stresses, and predictable fabrication behavior.
2. **Guaranteed Low-Temperature Toughness:** Suitable for dynamically loaded structures in environments down to **-20°C**.
3. **Good Weldability:** The normalized condition offers a stable base for welding.
**Typical Applications**
* Critical bridge components
* Offshore platform secondary structures
* Heavy welded machinery frames for cold climates
**Available Forms & Processing**
* **Forms:** Normalized plates and sections.
* **Processing:** Suitable for cutting, welding, and machining.
---
**Critical Procurement Note**
* **Use Correct Designation:** Specify **"EN 10025-3 S355J2G3"**. If "SA355J2G3" is mandated by a legacy specification, obtain written clarification on any special requirements it entails.
* **Thickness-Strength:** Properties are thickness-dependent; refer to EN 10025-3 tables.
* **Not "High Manganese":** Discontinue use of this term.
-:-
For detailed product information, please contact sales.
-:
EN SA355J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5842 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 SA355J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Properties
-:-
For detailed product information, please contact sales.
-:
Applications of EN SA355J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Flange
-:-
For detailed product information, please contact sales.
-:
Chemical Identifiers EN SA355J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Flange
-:-
For detailed product information, please contact sales.
-:
Packing of EN SA355J2G3 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 2313 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
