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 S275J0 High Manganese, Structural, Hot Rolled, Quality Steel Flange, t>200 mm Product Information
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EN S275J0 High Manganese, Structural, Hot Rolled, Quality Steel Flange, t>200 mm Synonyms
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EN S275J0 High Manganese, Structural, Hot Rolled, Quality Steel, t>200 mm Product Information
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# **Product Name:** EN S275J0 (S275) Structural Steel, Hot Rolled, Quality Grade, Ultra-Heavy Plate (t > 200 mm)
**Overview:**
EN S275J0 is a **non-alloy structural quality steel** according to EN 10025-2, corresponding to the S275 strength class with guaranteed impact toughness at **0°C**. While S275 grades generally have a higher permissible manganese content than S235 grades, the standard S275J0 is **not specifically classified as a "High Manganese" steel** in the technical sense reserved for designated grades like those in the 1.05xx series. When supplied in **ultra-heavy plate thicknesses exceeding 200 mm**, this material is engineered for massive, highly loaded structural components where through-thickness integrity and controlled toughness at moderate low temperatures are critical. Its production requires specialized metallurgical and rolling practices to ensure homogeneity.
**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:** **S275J0**
* **S:** Structural Steel.
* **275:** Minimum yield strength in MPa **for thicknesses ≤ 16mm**. For t > 200mm, the actual guaranteed minimum is significantly lower and must be contractually agreed.
* **J0:** Quality designation indicating impact energy testing at **0°C**.
* **Thickness Consideration:** For plates with **t > 200 mm**, the standard's standard property tables do not apply. The mechanical properties, especially yield and tensile strength, are subject to **manufacturer's specification and customer agreement**. This often falls under the implied scope of supplementary designation **"G2"** (properties not applied per standard tables), though for ultra-heavy plate, explicit agreement is mandatory.
* **Comparable Standards:** ASTM A572 Grade 40 (strength intent), ASTM A36 (general structural). For such thicknesses, specific agreements override standard minimums.
**Chemical Composition (Ladle Analysis, % by weight, max. values per EN 10025-2 for S275J0):**
Composition is controlled for weldability and consistency in heavy sections.
* **Carbon (C):** ≤ **0.21%** (Often targeted lower for improved weldability in thick plate).
* **Manganese (Mn):** ≤ **1.50%** (Permissible content is higher than S235, contributing to strength).
* **Phosphorus (P):** ≤ **0.035%** (Often specified lower, e.g., ≤0.025%, for heavy plate).
* **Sulphur (S):** ≤ **0.035%** (Often specified much lower, e.g., ≤0.010% or "calcium-treated", for superior through-thickness properties).
* **Silicon (Si):** **0.10% - 0.50%** (For killed steel, essential for soundness).
* **Nitrogen (N):** ≤ **0.018%**.
* **Carbon Equivalent (CET/CEV):** Will be calculated and controlled. Pre-heat for welding is essential.
**Physical & Mechanical Properties (for hot-rolled/normalized condition, t > 200 mm):**
***Note: All values for this thickness are subject to agreement. The following are typical/achievable targets, NOT standard guarantees.***
* **Yield Strength (ReH):** **Agreed Minimum.** Typically in the range of **≥ 240 - 255 MPa** (significantly reduced from the nominal 275 MPa).
* **Tensile Strength (Rm):** **Agreed Minimum.** Typically **410 - 540 MPa**.
* **Elongation at Break (A5):** **Agreed Minimum.** Typically **≥ 20%**.
* **Impact Energy (KV):** **≥ 27 J at 0°C** (This quality requirement usually holds, but **test location is critical**—typically at 1/4 thickness from a rolled surface).
* **Through-Thickness Properties (Z-direction):** **CRITICAL.** Must be specified per **EN 10164** (e.g., **Z25 or Z35** quality) to guarantee a minimum reduction of area and prevent lamellar tearing in heavy welded joints.
* **Ultrasonic Testing (UT):** **Mandatory.** Supplied to high-class standards like **EN 10160 Class S3E3** or specific job specifications (e.g., **ASTM A578 Level II** or **SE 1716**) to ensure internal soundness over the entire volume.
**Product Features for Ultra-Heavy Plate:**
1. **Designed for Massive Sections:** Manufactured with specific ingot or continuous casting, soaking, and controlled rolling/pressing practices to achieve a homogeneous structure.
2. **Guaranteed Internal Integrity:** Relies on mandatory UT and specified low sulphur levels to ensure freedom from significant inclusions and segregation.
3. **Controlled Toughness at Moderate Low Temperatures:** J0 quality provides a safety margin for structures exposed to temperatures around freezing point.
4. **Weldability with Strict Procedures:** Welding of such thick sections requires rigorously qualified procedures (per EN ISO 15614-1), including mandatory pre-heat, controlled interpass temperature, and post-weld heat treatment (PWHT) to manage residual stresses and HAZ properties.
**Typical Applications (for t > 200 mm):**
* **Heavy Civil & Offshore:** **Leg sections for deep-water offshore jackets, massive nodes in bridge supports (e.g., pylons), and anchor blocks for large dams or locks**.
* **Power Generation:** **Core support structures in nuclear plants, turbine generator foundations, and hydraulic cylinder blocks for hydropower**.
* **Press & Forging Machinery:** **Main frames, columns, and platens for mega-ton forging presses and extrusion presses**.
* **Shipbuilding:** **Rudder stocks for ultra-large container vessels (ULCV) and aircraft carriers**.
**Available Forms & Quality Supplements:**
* **Form:** **Ultra-heavy rolled or forged plates/slabs**.
* **Delivery Condition:** Usually **normalized (N)** or **normalized and tempered** to ensure uniform microstructure and relieve stresses. As-rolled is not typical for this thickness.
* **Mandatory Testing:** Full mechanical testing from defined locations (surface, 1/4t, 1/2t), full chemical analysis, comprehensive **UT report**, and often macro-etch tests.
* **Certification:** **EN 10204 Type 3.2 Inspection Certificate** is standard, detailing all agreed properties and test results.
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**Critical Procurement & Design Note:**
1. **No Standard Properties:** An order for **S275J0, t > 200mm** is incomplete without **explicitly agreed minimum mechanical properties** (ReH, Rm, A5, impact values).
2. **Essential Supplements:** The order must include: **UT requirements, Z-quality designation, agreed chemistry limits (especially low S), and delivery condition**.
3. **Not "High Manganese":** While Mn content is higher than S235, the term is imprecise. Focus on the **application-specific properties for ultra-heavy plate**.
4. **Example Order Clause:** *"EN 10025-2 S275J0, t=220mm, normalized. Min ReH ≥ 250 MPa, Min Rm ≥ 470 MPa, A5 ≥ 22%, KV ≥ 40J at 0°C (1/4t). P≤0.025%, S≤0.010%. UT per EN 10160 S3E3. Z35 per EN 10164."*
**Using the standard designation without these agreements for t > 200mm is a fundamental error that compromises structural safety and manufacturability.**
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EN S275J0 High Manganese, Structural, Hot Rolled, Quality Steel, t>200 mm Specification
Dimensions
Size：
Diameter 20-1000 mm Length <5820 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 S275J0 High Manganese, Structural, Hot Rolled, Quality Steel, t>200 mm Properties
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Applications of EN S275J0 High Manganese, Structural, Hot Rolled, Quality Steel Flange, t>200 mm
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Chemical Identifiers EN S275J0 High Manganese, Structural, Hot Rolled, Quality Steel Flange, t>200 mm
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Packing of EN S275J0 High Manganese, Structural, Hot Rolled, Quality Steel Flange, t>200 mm
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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 2291 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
