S355J2 Steel I Beam
S355J2 steel I-beams are high-strength structural sections compliant with EN 10025-2, offering exceptional load-bearing capacity and -20°C impact toughness for low-temperature resilience. Engineered for heavy-duty applications, they excel in bridges, industrial frameworks, and machinery. Their fine-grained microstructure ensures uniform mechanical properties, while excellent weldability and machinability simplify fabrication. With a minimum yield strength of 355 MPa, these beams balance strength, ductility, and fatigue resistance, meeting rigorous safety standards for demanding construction and engineering projects worldwide.
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◉ Key Attributes

Product Name:S355J2 Steel I Beam
Standard:ASTM,DIN,JIS,EN
Grade Group:SS400 SS540 SS235JR SS235J0 A36 Q355B Q420B
Flange Width:100-350mm or as request
Flange Thickness:3-14mm or as request
Web Width:150-600mm or as request
Web Thickness:3-12mm or as request
Suface Treatment:Black Painted / Oiled /Galvanized
Length:1-12m
Usage:widely used inmechanical manufacture,construction field,farm vehicles,agriculture greenhouse,automotive
industry,railway,decoration,steel structure,etc.
Supply Ability:5000 tons / month
Price Terms:FOB,CFR,CIF


◉ Product Details

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Product Introduction


I-beam is a type of structural steel section with a distinctive "I" shaped cross section. This design optimizes its strength-to-weight ratio, making it highly efficient for carrying heavy loads while minimizing material use. Typically crafted from carbon or low-alloy steel grades like ASTM A36 or ASTM A572, I Beams exhibit excellent mechanical properties, including high yield and tensile strengths, as well as good weldability and machinability. Their unique shape features a vertical web connecting two horizontal flanges, which provides superior resistance to bending and shear forces. Widely used in building frameworks, bridges, industrial structures, and heavy machinery, I Beams ensure structural integrity and stability. Their versatility, cost-efficiency, and ease of fabrication make them indispensable in modern construction and engineering, supporting everything from skyscrapers to large-scale infrastructure projects.


About Us


Zhongxi Metal is a professional manufacturer engaged in the research, development, production, sale and service.,  is committed to providing one-stop steel procurement services for global client.


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Advantages of I-Beams


1. Structural Efficiency and Load-Bearing Capacity

I Beams are engineered with an I-shaped cross-section, optimizing material distribution to maximize load-bearing capacity while minimizing weight. This design efficiently resists bending and shear forces, making them ideal for supporting heavy loads in bridges, buildings, and industrial frameworks. Their high strength-to-weight ratio reduces material costs and structural deadweight, enhancing overall project efficiency.

2. Material Optimization and Cost-Effectiveness

The geometry of I Beams minimizes material usage without compromising structural integrity. By concentrating material in the flanges and web—areas critical for resisting bending and shear—they reduce waste and lower manufacturing costs. This efficiency translates to economic advantages in large-scale construction, where material expenses constitute a significant portion of budgets.

3. Design Flexibility and Adaptability

I Beams offer versatile design possibilities, accommodating diverse architectural and engineering requirements. Their standardized dimensions and customizable lengths simplify integration into complex structures, from simple beams to multi-story frameworks. This adaptability reduces construction complexity and supports innovative designs, such as curved or tapered configurations.

4. Ease of Installation and Construction Speed

The lightweight yet robust nature of I Beams streamlines installation processes. Their uniformity in dimensions and properties enables prefabrication, reducing on-site labor and time. Additionally, compatibility with bolted or welded connections accelerates assembly, making them suitable for projects with tight deadlines or challenging site conditions.

5. Durability in Harsh Environments

I Beams exhibit exceptional resistance to environmental degradation, including corrosion and fatigue. When coated with protective finishes—such as galvanization or paint—they thrive in marine, industrial, or outdoor settings. This durability extends service life, lowers maintenance costs, and ensures long-term structural reliability.

6. Versatility Across Industries

Beyond construction, I Beams are integral to machinery, automotive, and aerospace applications. Their ability to withstand dynamic loads and vibrations makes them indispensable for cranes, vehicle chassis, and aircraft components. This cross-industry utility underscores their value as a foundational engineering material.

7. Sustainability and Recyclability

I Beams align with sustainable practices through their recyclability and energy efficiency. Steel, the primary material, retains its properties through recycling, reducing resource extraction. Additionally, their lightweight design lowers transportation emissions, contributing to eco-friendly construction methodologies.

8. Structural Stability and Safety

The I-beam’s geometry enhances stability under lateral and torsional loads, minimizing deflection and preventing buckling. This inherent rigidity ensures safety in seismic zones or high-wind areas, where structural resilience is paramount. Their predictable performance under stress also simplifies engineering calculations, reducing design risks.

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Quality Control


We have our own Physical & Chemical Testing Center Lab to guarantee our product quality. Our test items & instrument fully meet international standards.


Application of I-Beams


1. Construction Framework

I-beams are widely used as primary structural components in building frameworks due to their high strength-to-weight ratio. Their "I" shaped cross-section optimizes load distribution, making them ideal for supporting floors, roofs, and walls in residential, commercial, and industrial structures. The flanges resist bending moments while the web handles shear forces, ensuring stability and reducing material costs.

2. Bridge Engineering

In bridge construction, I-beams serve as critical load-bearing elements for bridges. Their design allows efficient load distribution across spans, making them suitable for both short and long-span bridges. The vertical web minimizes wind resistance, while the horizontal flanges provide stability against lateral forces, ensuring durability under heavy traffic and environmental stresses.

3. Mechanical Equipment Manufacturing

I-beams are utilized in manufacturing machinery and equipment, such as cranes, conveyors, and industrial frames. Their rigid structure supports heavy machinery components and withstands operational vibrations. The beams' uniform cross-section simplifies alignment and assembly, enhancing precision in mechanical systems.

4. Automotive Suspension Systems

In automotive engineering, I-beam structures are employed in suspension arms and chassis components. The design combines strength with flexibility, absorbing road shocks while maintaining vehicle stability. This application leverages the beam's ability to resist torsion and bending, ensuring safe and comfortable driving experiences.

5. Railway Infrastructure

I-beams form the backbone of railway tracks and stations. As rail supports, they provide a stable foundation for tracks, ensuring smooth train operations. Their corrosion-resistant properties and load-bearing capacity make them suitable for outdoor environments, withstanding heavy loads and dynamic forces from passing trains.

6. Aerospace Support Structures

In aerospace, lightweight I-beams are used in aircraft fuselages and wing supports. Their high strength-to-weight ratio reduces overall aircraft weight, improving fuel efficiency. The beams' precision engineering ensures structural integrity under extreme flight conditions, including turbulence and pressure changes.

7. Marine Vessel Construction

I-beams are integral to shipbuilding, providing structural support for hulls, decks, and bulkheads. Their resistance to corrosion and ability to withstand marine environments make them ideal for withstanding saltwater exposure. The beams' design ensures vessel stability and longevity in harsh oceanic conditions.

8. Energy Sector Applications

In renewable energy, I-beams support solar panel arrays and wind turbine towers. Their durability and load-bearing capacity accommodate heavy equipment and withstand environmental stresses like wind and snow. The beams' modular design simplifies installation and maintenance of energy infrastructure.


Contact Us


As a leading company, Zhongxi Metal is known for our excellent product quality and professional services, providing our customers with a reliable partner. We have a global sales network that can meet the needs of customers in different countries and regions.If you need more information about us or have any other needs, please feel free to contact us. We look forward to working with you to create a better future.


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