EN S235JRG2 High Manganese, Base Steel Rod/Bar

EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Rod, t>63 mm Product Information -:- For detailed product information, please contact sales. -: EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Rod, t>63 mm Synonyms -:- For detailed product information, please contact sales. -:

EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel, t>63 mm Product Information -:- For detailed product information, please contact sales. -: **Product Name:** EN S235JRG2 Structural Steel, Hot Rolled, for Heavy Thickness (t > 63 mm) **Overview:** EN S235JRG2 is a **non-alloy structural steel** specified for **extra-heavy thickness applications**, defined under the EN 10025-2 standard. The supplementary designation **"G2"** explicitly indicates that this steel grade is intended for products where the **specified minimum values of yield strength and tensile strength are not applicable** as per the standard's standard thickness tables. In practice, this primarily applies to **plates and sections with thicknesses exceeding 63 mm**, where the inherent effects of mass and slower cooling during rolling necessitate special consideration. This grade provides a standardized way to procure and specify S235JR material for these heavy sections, acknowledging its de-rated strength properties. It is **not a "High Manganese" steel**. **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 & Condition Designation:** **S235JRG2** * **S:** Structural Steel. * **235:** Nominal yield strength class. However, for "G2" products, the **minimum yield strength is NOT guaranteed to be 235 MPa**. It is subject to manufacturer's specification or customer agreement. * **JR:** Base quality designation. Impact tested at **+20°C**. * **G2:** **Critical supplementary designation** meaning: "**Steels for which the specified minimum values of yield strength and tensile strength are not applied**" (as defined in EN 10025-2, clause 8.2.2). This is essentially the standard's designation for **heavy thickness material** (typically **t > 63 mm**). * **Clarification:** This grade exists **specifically to address the property reduction in very thick sections**. The mechanical properties are not those listed in the main tables for S235JR. They must be **agreed upon at the time of enquiry and order**. * **Clarification on "High Manganese":** This is **incorrect**. S235JRG2 has the standard S235JR composition. Its unique characteristic is its formalized application to thicknesses where standard property guarantees do not hold. **Chemical Composition (Ladle Analysis, % by weight, maximum values):** Standard S235JR composition, often with stricter internal controls to ensure homogeneity in heavy sections. * **Carbon (C):** ≤ **0.17%** * **Manganese (Mn):** ≤ **1.40%** (May be controlled to a mid-range for consistency). * **Phosphorus (P):** ≤ **0.045%** * **Sulphur (S):** ≤ **0.045%** (Often specified lower, e.g., ≤0.030%, for improved through-thickness properties). * **Silicon (Si):** Used for killing to ensure sound internal structure. * **Note:** For such thicknesses, the steel is **fully killed** to minimize segregation and ensure integrity. **Physical & Mechanical Properties (for heavy thickness t > 63 mm):** ***Properties are not standard and must be contractually agreed.*** The following are **typical achievable or negotiable values**, not guarantees. * **Yield Strength (ReH):** **Approx. 215 - 225 MPa** (Typical achievable minimum, significantly lower than the nominal 235 MPa for thin sections). * **Tensile Strength (Rm):** **Approx. 340 - 470 MPa**. * **Elongation (A5):** Subject to agreement; typically ≥ **22%**. * **Impact Energy (KV):** **≥ 27 J at +20°C** (This quality requirement typically remains, but test location - e.g., 1/4 thickness - is crucial). * **Through-Thickness Properties:** Highly important. **Reduction of area in the short transverse direction (Z-direction)** should be specified (e.g., per EN 10164, quality level Z15 or Z25) to prevent lamellar tearing in heavy welded joints. * **Ultrasonic Testing (UT):** **Mandatory for quality assurance.** Supplied to standards like EN 10160 or specific customer requirements (SE 1716, ASTM A578) to ensure internal soundness. **Product Features:** 1. **For Extra-Heavy Sections:** The primary and sole purpose of the "G2" designation is to formally categorize this material for thicknesses > 63 mm. 2. **Controlled Homogeneity:** Produced with special melting, casting, and rolling practices to ensure as uniform a structure as possible through the massive cross-section. 3. **Mandatory Non-Destructive Testing:** Relies on ultrasonic inspection to verify internal quality, which is more critical than standardized tensile properties for such applications. 4. **Negotiated Properties:** Engineers must actively define the required minimum properties based on the specific design case, rather than relying on standard table values. **Typical Applications (for t > 63 mm):** Used in massive, highly loaded structural components. * **Heavy Civil Engineering:** **Base blocks for large bridge piers, massive anchorages, and thick nodes in offshore or heavy industrial structures**. * **Power Generation:** **Extremely thick sections for hydropower plant components (turbine housings), nuclear plant structural supports, and heavy machinery foundations**. * **Press & Forging Equipment:** **Frames, platens, and anvils** for giant mechanical presses and forging hammers. * **Shipbuilding:** **Rudder stocks and stern frames** for very large vessels. **Available Forms & Quality Supplements:** * **Forms:** Exclusively **extra-heavy rolled plates** and **forged slabs or blocks**. Not available as standard sections. * **Delivery Condition:** **As-rolled, normalized, or stress-relieved**, depending on the order and thickness. * **Mandatory Supplements:** **Ultrasonic Testing Certificate.** Chemical analysis from top and bottom of the ingot. Mechanical tests from defined locations (often 1/4 thickness). --- **Critical Procurement & Design Note:** 1. **"G2" Means Negotiated Properties:** Purchasing S235JRG2 **without agreed mechanical property values is incorrect**. The inquiry must state the **required minimum Yield Strength, Tensile Strength, and Elongation** for the specific thickness. 2. **Not "High Manganese":** This term is irrelevant. The challenge is **property retention in thick sections**, not alloying. 3. **Design Responsibility:** The structural designer must use the **agreed-upon, lower strength values** in calculations. Assuming 235 MPa yield strength is a serious error. 4. **Specification:** A complete order will read something like: "EN 10025-2 S235JRG2, t=100mm, Min ReH ≥ 220 MPa, Min Rm ≥ 360 MPa, with UT inspection per EN 10160, Class S2E2, and Z25 quality per EN 10164." -:- For detailed product information, please contact sales. -: EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel, t>63 mm Specification Dimensions Size： Diameter 20-1000 mm Length <5817 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 S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel, t>63 mm Properties -:- For detailed product information, please contact sales. -:

Applications of EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Rod, t>63 mm -:- For detailed product information, please contact sales. -: Chemical Identifiers EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Rod, t>63 mm -:- For detailed product information, please contact sales. -:

Packing of EN S235JRG2 High Manganese, Structural, Hot Rolled, Base Steel Rod, t>63 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 Rod 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 2288 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