EN S275JR High Manganese, Structural, Hot Rolled, Base Steel

EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Product Information -:- For detailed product information, please contact sales. -: EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Synonyms -:- For detailed product information, please contact sales. -:

EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Product Information -:- For detailed product information, please contact sales. -: # **Product Name:** EN S275JR Structural Steel, Hot Rolled, Base Material **Overview:** EN S275JR is the **standard non-alloy structural steel** within the S275 strength category, defined as a **base material** under the EN 10025-2 standard. The "JR" designation indicates the **basic quality level**, with impact properties verified at room temperature (+20°C). It is a fundamental, cost-effective engineering material offering a balanced combination of adequate strength, excellent weldability, and good formability in the hot-rolled condition. It is critical to clarify that **S275JR is NOT classified as a "High Manganese" steel**; it is a standard carbon-manganese steel with typical manganese levels for its strength class. The term "High Manganese" is a misnomer and should not be applied to this grade. **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:** **S275JR** * **S:** Structural Steel. * **275:** Minimum yield strength (ReH) in MPa for nominal thickness **≤ 16 mm**. This value decreases for greater thicknesses as per standard tables. * **JR:** Basic quality designation. **'J'** signifies the steel is impact tested, and **'R'** denotes the test temperature is **Room Temperature (+20°C)**. * **Clarification on "High Manganese":** This is an **incorrect and misleading classification**. The permissible manganese content for S275JR (≤1.50%) is standard for this strength class and is not considered "high" in a technical or specialized sense. Its properties are those of a general-purpose base steel. * **Common International Equivalents:** * **ASTM:** **A36** (the most common general-purpose equivalent, though chemistry differs). * **JIS:** **SM400A**. * **GB/T:** **Q275B**. * **ISO:** **ISO 630-2:2021, Grade E275**. **Chemical Composition (Ladle Analysis, % by weight, maximum values per EN 10025-2):** Standard composition designed for manufacturability and cost-efficiency. * **Carbon (C):** ≤ **0.21%** * **Manganese (Mn):** ≤ **1.50%** (This is the standard upper limit for the S275 class, not a specially elevated "high" level). * **Phosphorus (P):** ≤ **0.040%** * **Sulphur (S):** ≤ **0.040%** * **Nitrogen (N):** ≤ **0.014%** (for killed steel, common for thicker products). * **Note:** For thinner products (e.g., sheet), it may be supplied as rimming steel. **Physical & Mechanical Properties (for hot-rolled condition, nominal for thickness ≤ 16 mm):** * **Yield Strength (ReH):** ≥ **275 MPa** (Highest guaranteed value, applicable only for t ≤ 16 mm). * **Tensile Strength (Rm):** **410 - 560 MPa**. * **Elongation at Break (A5):** ≥ **22%** (Minimum, longitudinal test piece). * **Impact Energy (KV):** ≥ **27 J at +20°C** (Longitudinal, Charpy V-notch). **CRITICAL LIMITATION:** This grade has **no guaranteed impact properties below +20°C**. It is not suitable for low-temperature service without specific engineering assessment. * **Density:** **7.85 g/cm³**. * **Modulus of Elasticity:** **210 GPa**. * **Poisson's Ratio:** **0.3**. **Product Features:** 1. **Cost-Effectiveness:** The most economical grade within the S275 strength category, providing a good balance of properties for a vast array of applications. 2. **Excellent Weldability:** Low carbon equivalent allows for easy welding with all common processes (SMAW, MAG/MIG, SAW) without pre-heating requirements for most thicknesses and joint types. 3. **Good Formability:** Suitable for cold bending, shearing, and punching operations. 4. **Proven Reliability:** A globally recognized and trusted material with well-understood behavior, widely available in numerous forms. **Typical Applications:** S275JR is used in a wide range of general structural applications where specific low-temperature toughness is not a requirement. * **General Construction:** Beams, columns, bracings, and plates in commercial buildings, industrial halls, and warehouses in temperate climates. * **General Fabrication:** Machine frames, guards, platforms, staircases, non-critical brackets, and supports. * **Transportation:** Chassis components for trailers, body frames for trucks, and non-structural parts. * **Storage & Furniture:** Shelving units, storage rack components, and industrial furniture. * **Infrastructure:** Fencing, simple supports, and non-load bearing architectural elements. **Available Forms & Processing:** * **Forms:** Hot-rolled sheets, plates, strips, bars (round, flat, square), and all common structural sections (IPE/HEA beams, UNP channels, angles). * **Surface:** Typically with mill scale. Can be shot blasted or primed upon request. * **Processing:** Ideal for shearing, punching, plasma/laser cutting, drilling, welding, and cold bending. --- **Critical Selection & Procurement Note:** * **Temperature Limitation (Most Important):** The **JR quality is unsuitable for applications where the service temperature can fall below 0°C**, especially under dynamic or impact loads. For such applications, **S275J0 (0°C)** or **S275J2 (-20°C)** must be specified. * **Thickness-Strength Relationship:** The guaranteed minimum yield strength of **275 MPa applies only to thickness ≤ 16 mm**. For thicker material, the minimum yield strength is reduced (e.g., ≥265 MPa for t > 40mm ≤ 63mm). Always use the correct value for the product thickness in design calculations. * **Correct Terminology:** **DO NOT use the term "High Manganese Steel."** The correct and only accurate description is **"Non-Alloy Base Structural Steel, Grade S275JR."** * **Specification:** For most purposes, specifying **"S275JR"** is sufficient. For critical applications, confirming the supply of "killed steel" may be advisable to ensure better internal soundness for welding. -:- For detailed product information, please contact sales. -: EN S275JR High Manganese, Structural, Hot Rolled, Base Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5829 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 S275JR High Manganese, Structural, Hot Rolled, Base Steel Properties -:- For detailed product information, please contact sales. -:

Applications of EN S275JR High Manganese, Structural, Hot Rolled, Base Steel -:- For detailed product information, please contact sales. -: Chemical Identifiers EN S275JR High Manganese, Structural, Hot Rolled, Base Steel -:- For detailed product information, please contact sales. -:

Packing of EN S275JR High Manganese, Structural, Hot Rolled, Base Steel -:- 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 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 2300 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