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 S355J0 High Manganese, Structural, Hot Rolled, Quality Steel Flange Product Information
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EN S355J0 High Manganese, Structural, Hot Rolled, Quality Steel Flange Synonyms
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EN S355J0 High Manganese, Structural, Hot Rolled, Quality Steel Product Information
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# **Product Name:** EN S355J0 Structural Steel, Hot Rolled, Quality Grade
**Overview**
EN S355J0 is a **non-alloy structural quality steel** belonging to the widely used S355 strength category as per EN 10025-2. The "J0" designation guarantees the material's **impact toughness at 0°C**, making it suitable for structures exposed to moderately low temperatures. While S355 steels generally have higher permissible alloy content than lower grades, S355J0 is **not specifically classified as a "High Manganese" steel** in a technical sense. It represents a fundamental and cost-effective quality grade within the high-strength structural steel family, offering an optimal balance of strength, weldability, and low-temperature performance for general engineering.
**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:** **S355J0**
* **S:** Structural Steel
* **355:** Minimum yield strength (ReH) in MPa for thickness ≤ 16 mm.
* **J0:** Quality designation indicating impact energy testing at **0°C**.
* **Clarification on "High Manganese":** This is a **misleading term** for this grade. While the permissible manganese content (≤1.60%) is higher than in S235/S275 grades, it is the standard range for S355. The "High Manganese" label is not an official classification and obscures the grade's primary feature: guaranteed toughness at 0°C.
* **Common International Equivalents:**
* **ASTM:** **A572 Grade 50** (closest mechanical equivalent, min. yield 345 MPa/50 ksi).
* **JIS:** **SM490A**.
* **GB/T:** **Q355B**.
* **ISO:** **ISO 630-2:2021, Grade E355**.
**Chemical Composition (Ladle Analysis, % by weight, maximum values per EN 10025-2)**
* **Carbon (C):** ≤ **0.22%**
* **Manganese (Mn):** ≤ **1.60%** (This is the standard upper limit for S355, not a special "high" level).
* **Phosphorus (P):** ≤ **0.035%**
* **Sulphur (S):** ≤ **0.035%**
* **Silicon (Si):** ≤ **0.55%**
* **Nitrogen (N):** ≤ **0.018%** (for killed steel)
* **Carbon Equivalent (CEV):** Typically in the range of **0.40 - 0.45%**. This is a critical parameter for determining appropriate welding procedures, especially for thicker sections.
**Physical & Mechanical Properties (for hot-rolled condition, thickness ≤ 16 mm)**
* **Yield Strength (ReH):** ≥ **355 MPa** (Minimum, thickness-dependent).
* **Tensile Strength (Rm):** **470 - 630 MPa**.
* **Elongation at Break (A5):** ≥ **21%** (Minimum, longitudinal test piece).
* **Impact Energy (KV):** **≥ 27 J at 0°C** (Longitudinal, Charpy V-notch). This is the defining property of the J0 quality.
* **Density:** **~7.85 g/cm³**.
* **Modulus of Elasticity:** **210 GPa**.
* **Poisson's Ratio:** **0.3**.
**Product Features**
1. **High Strength-to-Weight Ratio:** The 355 MPa minimum yield strength allows for lighter and more efficient structural designs compared to S235 and S275 steels.
2. **Guaranteed Low-Temperature Toughness:** Suitable for outdoor structures and dynamically loaded components in climates where temperatures regularly reach **0°C**.
3. **Good Weldability (with Procedure):** Weldable with all common methods. Due to the higher carbon equivalent compared to S235, controlled procedures with pre-heating (per EN 1011) are recommended for thicker sections (>30 mm) and restrained joints to prevent hydrogen-induced cracking.
4. **Favorable Formability:** Can be cold formed and machined, though allowances for its higher strength must be considered.
**Typical Applications**
S355J0 is one of the most widely used structural steels in Europe for demanding applications.
* **Heavy Construction:** Primary beams, columns, and trusses in **industrial buildings, commercial structures, and medium-span bridges**.
* **Crane & Lifting Equipment:** **Runway beams, boom sections, and structural parts** for mobile and overhead cranes.
* **Heavy Vehicle & Transportation:** **Chassis frames for trucks, trailers, railway wagons, and mining vehicles**.
* **Energy & Heavy Machinery:** **Support structures, frames, and bases** for machinery and plant equipment.
* **General Engineering:** Any structural component requiring higher strength than S275 and reliable performance at temperatures around freezing.
**Available Forms & Processing**
* **Forms:** Hot-rolled plates, sheets, strips, bars (round, flat), and all common structural sections (HEA/HEB beams, IPE beams, channels, angles).
* **Surface:** Typically supplied with mill scale. Commonly available as shot blasted or primed.
* **Processing:** Excellent suitability for cutting, welding, drilling, and cold forming. Normalizing can be specified for complex fabrications or thicker plates.
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**Critical Procurement Note**
* **Specify Full Designation:** Always specify **"S355J0"** to ensure the correct toughness quality is supplied. "S355" alone is ambiguous.
* **Thickness is Key:** Mechanical properties, especially yield strength, are **thickness-dependent**. For plates >40 mm, the minimum yield strength is reduced as per EN 10025-2 tables. Use the correct value for design.
* **Temperature Limit:** The J0 quality is validated for **0°C**. For service temperatures consistently below -10°C or for highly critical/dynamic applications, grades with lower temperature toughness such as **S355J2 (-20°C)** or fine-grained steels (**S355NL/ML**) should be specified.
* **Avoid Incorrect Terminology:** **Do not use "High Manganese Steel."** The correct classification is **"Non-Alloy Quality Structural Steel, Grade S355J0."**
* **Welding Considerations:** Always reference the carbon equivalent (CEV) when developing welding procedures. Proper technique is crucial for integrity.
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EN S355J0 High Manganese, Structural, Hot Rolled, Quality Steel Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5831 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 S355J0 High Manganese, Structural, Hot Rolled, Quality Steel Properties
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Applications of EN S355J0 High Manganese, Structural, Hot Rolled, Quality Steel Flange
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Chemical Identifiers EN S355J0 High Manganese, Structural, Hot Rolled, Quality Steel Flange
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Packing of EN S355J0 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 2302 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
