EN 1.0577 High Manganese, Structural, Hot Rolled, Quality Steel

EN 1.0577 High Manganese, Structural, Hot Rolled, Quality Steel Product Information -:- For detailed product information, please contact sales. -: EN 1.0577 High Manganese, Structural, Hot Rolled, Quality Steel Synonyms -:- For detailed product information, please contact sales. -:

EN 1.0577 High Manganese, Structural, Hot Rolled, Quality Steel Product Information -:- For detailed product information, please contact sales. -: **Product Name:** EN 1.0577 (S355) Structural Steel, Hot Rolled, Quality Grade **Overview:** EN 1.0577 is a **high-manganese, fine-grain, non-alloy quality structural steel** classified within the S355 strength category according to European standards. This specific grade is distinguished by its enhanced toughness and consistent mechanical properties, which are achieved through fine-grain practice. It is designed for demanding structural applications where superior impact resistance at low temperatures and high load-bearing capacity are critical requirements. As a hot-rolled product, it offers an excellent combination of strength, weldability, and toughness for critical engineering structures. **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 Designation:** The material number 1.0577 corresponds to the **S355** strength class with specific chemical and processing requirements. * **Quality Designation:** This grade typically corresponds to higher toughness qualities, particularly: * **S355J2:** Impact tested at **-20°C**. * **S355K2:** Impact tested at **-20°C** with minimum 40J impact energy (this is the most likely quality for 1.0577). * **Important Note:** The "1.0577" designation specifically implies **fine grain practice** and enhanced toughness, making it suitable for applications requiring certification to **EN 10225** (Weldable structural steels for fixed offshore structures) or similar demanding specifications. * **Equivalents & Comparisons:** * **ASTM:** A572 Grade 50 (strength equivalent), A709 Grade 50. * **JIS:** SM490YA (weathering steel equivalent in strength and toughness). * **GB/T:** Q355D/E (Chinese equivalents with similar low-temperature impact requirements). * **ISO:** ISO 630-2:2021, Grade E355. **Chemical Composition (Ladle Analysis, % by weight, typical maximum values):** The composition is optimized for fine grain structure and enhanced toughness. * **Carbon (C):** ≤ **0.18%** (Lower maximum than standard S355 for improved weldability and toughness). * **Manganese (Mn):** **1.00 - 1.60%** (Elevated for strength and hardenability, carefully balanced with carbon). * **Phosphorus (P):** ≤ **0.030%** (Tighter control for better toughness). * **Sulphur (S):** ≤ **0.030%** (Tighter control for improved formability and weldability). * **Silicon (Si):** **0.10 - 0.50%** (For deoxidation and strength). * **Nitrogen (N):** ≤ **0.015%** (Controlled to prevent aging effects). * **Aluminum (Al):** ≥ **0.020%** (For grain refinement - key for fine-grain practice). * **Niobium (Nb):** May be added in controlled amounts (≤ 0.05%) for additional grain refinement and precipitation strengthening. * **Carbon Equivalent (CEV):** Typically **0.38 - 0.43%**, optimized for weldability in demanding applications. **Physical & Mechanical Properties (for hot-rolled/normalized condition, thickness ≤ 16mm):** * **Yield Strength (ReH):** ≥ **355 MPa** (Minimum, thickness-dependent - decreases with increasing thickness). * **Tensile Strength (Rm):** **470 - 630 MPa**. * **Elongation at Break (A5):** ≥ **22%**. * **Impact Energy (KV):** * **S355J2:** ≥ **27 J at -20°C** (Longitudinal). * **S355K2:** ≥ **40 J at -20°C** (Longitudinal - typical for offshore applications). * **Yield-to-Tensile Ratio:** ≤ **0.91** (Important for seismic performance and plastic deformation capacity). * **Fine Grain Size:** Typically **ASTM 6 or finer** (≥ 6) as per EN ISO 643. * **Density:** **7.85 g/cm³**. * **Modulus of Elasticity:** **210 GPa**. * **Poisson's Ratio:** **0.3**. **Product Features:** 1. **Enhanced Low-Temperature Toughness:** Specifically designed for applications where service temperatures may drop to -20°C or below, with guaranteed impact energy at these temperatures. 2. **Fine-Grain Structure:** Aluminum and possibly niobium treatment ensures a fine, uniform grain structure that improves both toughness and strength while reducing susceptibility to brittle fracture. 3. **Excellent Weldability:** Despite its higher strength, the controlled carbon content and carbon equivalent allow for good weldability with proper procedures. Pre-heating and controlled heat input are particularly important for thicker sections. 4. **Consistent Through-Thickness Properties:** The fine-grain practice and controlled rolling ensure more uniform mechanical properties throughout the material thickness. 5. **Fatigue Resistance:** The fine, homogeneous microstructure contributes to good fatigue performance under cyclic loading conditions. **Typical Applications:** EN 1.0577 is specified for critical structures where safety and reliability are paramount: * **Offshore Structures:** **Jacket legs, nodes, braces, and decks** for fixed offshore platforms (often to EN 10225 specifications). * **Bridge Construction:** **Critical welded components, expansion joints, and supports** in road and railway bridges, especially in cold climates. * **Heavy Lifting & Crane Equipment:** **Boom sections, slewing rings, and critical welds** in mobile, tower, and gantry cranes. * **Wind Energy:** **Tower flanges, transition pieces, and internal platforms** for onshore and offshore wind turbines. * **Shipbuilding:** **Ice-strengthened components, critical hull sections, and offshore vessel structures**. * **Seismic-Resistant Construction:** **Moment-resisting frames and critical connections** in buildings located in earthquake-prone areas. **Available Forms & Quality Supplements:** * **Forms:** Primarily **heavy plates** (thickness typically 10-150 mm), also available as sections and bars. * **Delivery Condition:** Usually **normalized (N)** or **thermomechanically rolled (TM)** to ensure the fine-grain structure and toughness properties. * **Testing:** Extensive testing including **Charpy V-notch tests at specified temperatures, tensile tests, and chemical analysis**. Ultrasonic testing (UT) per EN 10160 is common for plates. * **Optional Requirements:** Through-thickness properties (Z-quality per EN 10164), increased toughness at lower temperatures, specific heat treatments. --- **Critical Note:** EN 1.0577 represents a **higher quality tier within the S355 family**. For procurement, it is essential to specify not just "S355" but the full designation including the required **impact toughness quality (J2 or K2) and any supplementary requirements**. The guaranteed mechanical properties are thickness-dependent, and for plates over 40 mm, the minimum yield strength values are reduced according to EN 10025-2 tables. This grade is typically supplied with comprehensive certification (EN 10204 3.2) and is suitable for the most demanding structural applications. -:- For detailed product information, please contact sales. -: EN 1.0577 High Manganese, Structural, Hot Rolled, Quality Steel Specification Dimensions Size： Diameter 20-1000 mm Length <5801 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 1.0577 High Manganese, Structural, Hot Rolled, Quality Steel Properties -:- For detailed product information, please contact sales. -:

Applications of EN 1.0577 High Manganese, Structural, Hot Rolled, Quality Steel -:- For detailed product information, please contact sales. -: Chemical Identifiers EN 1.0577 High Manganese, Structural, Hot Rolled, Quality Steel -:- For detailed product information, please contact sales. -:

Packing of EN 1.0577 High Manganese, Structural, Hot Rolled, Quality 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 2272 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