EN S275J2G3 High Manganese, Quality Steel Capillary

EN S275J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Capillary, t>200 mm Product Information -:- For detailed product information, please contact sales. -: EN S275J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Capillary, t>200 mm Synonyms -:- For detailed product information, please contact sales. -:

EN S275J2G3 High Manganese, Structural, Hot Rolled, Quality Steel, t>200 mm Product Information -:- For detailed product information, please contact sales. -: # **Product Name:** EN S275J2G3 (S275J2+N) Structural Steel, Normalized, Quality Grade, Ultra-Heavy Plate (t > 200 mm) **Overview:** EN S275J2G3 is a **non-alloy, fine-grained structural quality steel**, defined by the European standard EN 10025-3 for normalized/normalized rolled weldable fine grain steels. The "J2G3" designation specifies a material with **guaranteed impact toughness at -20°C (J2)** supplied in the **normalized delivery condition (G3)**. For **ultra-heavy plates exceeding 200 mm in thickness**, this grade represents a high-integrity material choice for critical applications where exceptional through-thickness homogeneity, reliable low-temperature toughness, and weldability are paramount. The normalized heat treatment is essential for achieving a uniform, refined microstructure in such massive sections. It is **not a "High Manganese" steel**; its performance is derived from fine grain practice and heat treatment. **Key International Standards:** * **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. * **Grade & Condition Designation:** **S275J2G3** * **S:** Structural Steel. * **275:** Minimum yield strength in MPa **for thicknesses ≤ 16mm**. For t > 200mm, the actual guaranteed minimum is subject to agreement and will be significantly lower. * **J2:** Quality designation, guaranteeing impact energy testing at **-20°C**. * **G3/N:** Indicates the **normalized (N)** delivery condition. This is a mandatory and defining process for such heavy plate to ensure property uniformity. * **Important Note on Thickness:** For plates with **t > 200 mm**, the standard's standard property tables do not apply. The mechanical properties are subject to **manufacturer's specification and customer agreement**. The "G2" concept (properties not applied) from EN 10025-2 is implicit here, though explicit negotiation is required. * **Special Requirements:** For this thickness, compliance with supplementary standards for **through-thickness properties (EN 10164)** and **ultrasonic testing (EN 10160)** is non-negotiable. **Chemical Composition (Ladle Analysis, % by weight, typical maximum values per EN 10025-3 for S275J2):** Composition is controlled for fine grain formation, toughness, and weldability. * **Carbon (C):** ≤ **0.18%** (Lower than standard S275J2 per EN 10025-2, for better weldability and toughness). * **Manganese (Mn):** ≤ **1.50%** * **Phosphorus (P):** ≤ **0.030%** (Tighter control). * **Sulphur (S):** ≤ **0.025%** (Very low to ensure good through-thickness properties). * **Silicon (Si):** ≤ **0.50%** * **Nitrogen (N):** ≤ **0.015%** * **Aluminum (Alt):** ≥ **0.020%** (Mandatory for grain refinement in fine grain steels). * **Microalloys (Nb, V):** May be added in controlled amounts for additional grain refinement. * **Carbon Equivalent (CEV):** Typically low (~0.38-0.42), critical for welding procedure specification. **Physical & Mechanical Properties (for normalized condition, t > 200 mm):** ***All values for this thickness are subject to agreement. The following are typical/achievable targets.*** * **Yield Strength (ReH):** **Agreed Minimum.** Typically in the range of **≥ 240 - 260 MPa**. * **Tensile Strength (Rm):** **Agreed Minimum.** Typically **410 - 540 MPa**. * **Elongation at Break (A5):** **Agreed Minimum.** Typically **≥ 20%**. * **Impact Energy (KV):** **≥ 27 J at -20°C** (This quality requirement usually holds, but **test location and orientation are critical**—typically at 1/4 thickness, longitudinal and transversal). * **Fine Grain Size:** Minimum grain size **6 or finer** as per EN ISO 643 (ensures microstructure homogeneity). * **Through-Thickness Properties (Z-direction):** **MUST be specified.** Minimum **Z25** per EN 10164, with **Z35** strongly recommended for highly constrained welds. * **Ultrasonic Testing (UT):** **Mandatory.** Supplied to **EN 10160 Class S3E3** or higher (e.g., S4E4) to ensure internal soundness. **Product Features for Ultra-Heavy Plate:** 1. **Normalized Homogeneity (G3):** The normalization heat treatment is essential for refining the grain structure, relieving internal stresses from rolling, and ensuring uniform mechanical properties throughout the massive cross-section. 2. **Guaranteed Low-Temperature Toughness:** J2 quality provides reliable performance for structures exposed to temperatures as low as **-20°C**, a common requirement for offshore, arctic, or winter construction. 3. **Fine Grain Practice:** The aluminum treatment ensures a fine, tough microstructure with improved resistance to brittle fracture. 4. **Superior Weldability (with Procedure):** The combination of low carbon, fine grain, and normalized condition provides a favorable base for welding. However, welding of such thick sections requires rigorously qualified procedures (PWPS per EN ISO 15614-1), including strict pre-heat, interpass control, and Post Weld Heat Treatment (PWHT). **Typical Applications (for t > 200 mm):** * **Offshore & Maritime:** **Critical nodes, chords, and stiffened panels for offshore jacket structures** and **ice-strengthened hull sections** for arctic vessels. * **Heavy Civil Engineering:** **Pylon anchorages for long-span bridges, dam gate supports, and massive nodes in seismic-resistant structures**. * **Power Generation:** **Core support structures in nuclear facilities, turbine generator pedestals, and hydraulic accumulator blocks**. * **Press & Forging:** **Columns and platens for ultra-heavy forging presses** requiring high integrity. **Available Forms & Quality Supplements:** * **Form:** **Ultra-heavy normalized plates**. * **Delivery Condition:** **Normalized (N)**. May be followed by stress relieving. * **Mandatory Testing:** Full mechanical testing from defined locations (surface, 1/4t, 1/2t), Charpy tests at -20°C, chemical analysis, grain size determination, **UT report**, and macro-etch tests. * **Certification:** **EN 10204 Type 3.2 Inspection Certificate** is standard. --- **Critical Procurement & Design Note:** 1. **Agreed Properties are Mandatory:** An order for **S275J2G3, t > 200mm** is invalid without **explicitly agreed minimum mechanical properties** (ReH, Rm, A5, impact values at -20°C). 2. **Essential Supplementary Requirements:** The order must include: **UT class, Z-quality designation (e.g., Z35), fine grain verification, and agreed chemistry limits**. 3. **Not "High Manganese":** This term is imprecise and should not be used. Focus on **"Normalized Fine Grain Steel for Ultra-Heavy Plate with -20°C Toughness."** 4. **Example Order Clause:** *"EN 10025-3 S275J2G3 (S275J2+N), t=220mm. Min ReH ≥ 250 MPa, Min Rm ≥ 480 MPa, A5 ≥ 22%, KV ≥ 40J at -20°C (1/4t, longitudinal & transversal). P≤0.020%, S≤0.008%. UT per EN 10160 S3E3. Z35 per EN 10164. Grain size ≥7 per EN ISO 643."* **Using this grade for such thickness without explicit technical agreements is a critical engineering and procurement failure.** -:- For detailed product information, please contact sales. -: EN S275J2G3 High Manganese, Structural, Hot Rolled, Quality Steel, t>200 mm Specification Dimensions Size： Diameter 20-1000 mm Length <5823 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 S275J2G3 High Manganese, Structural, Hot Rolled, Quality Steel, t>200 mm Properties -:- For detailed product information, please contact sales. -:

Applications of EN S275J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Capillary, t>200 mm -:- For detailed product information, please contact sales. -: Chemical Identifiers EN S275J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Capillary, t>200 mm -:- For detailed product information, please contact sales. -:

Packing of EN S275J2G3 High Manganese, Structural, Hot Rolled, Quality Steel Capillary, t>200 mm -:- 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 Capillary 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 2294 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