S355J2 Carbon Steel: Composition, Mechanical Properties, Applications & Supplier Guide

S355J2 carbon steel is a non-alloy structural steel grade under the EN 10025-2 standard, known for its excellent strength, toughness, and weldability. The “J2” designation indicates that the material has undergone impact testing at -20°C, making it ideal for low-temperature environments and heavy-duty structural applications.

In this comprehensive guide, we cover everything about S355J2 carbon steel — including its chemical composition, mechanical properties, applications, comparison with other grades, pricing, and leading suppliers in India.

🔍 What is S355J2 Carbon Steel?

S355J2 is a high-strength, low-alloy (HSLA) structural steel grade commonly used in construction, bridges, machinery, and engineering applications. It belongs to the S355 family (S355JR, S355J0, S355J2), with the “J2” indicating superior impact toughness at -20°C.

S355J2 offers:

• High yield strength

• Good tensile properties

• Excellent weldability

• Impact resistance in cold climates

🧪 Chemical Composition of S355J2

🔍 The low carbon content enhances weldability, while controlled sulfur and phosphorus ensure better machinability and toughness.

⚙️ Mechanical Properties of S355J2 Steel

💡 S355J2 is ideal for critical applications where mechanical strength and resistance to brittle fracture are essential.

📦 Product Forms Available in S355J2

S355J2 carbon steel is available in a variety of rolled, forged, and processed forms:

• Hot-Rolled Plates

• Structural Steel Sections (Angles, Channels, Beams)

• Flat Bars, Square Bars

• Forged Round Bars

• Hollow Sections / Pipes (on request)

📏 Plate Thickness: 6 mm – 150 mm
📏 Bar Diameter: 20 mm – 400 mm
📏 Standard Lengths: 6m, 12m (custom cut available)

🧰 Applications of S355J2 Carbon Steel

Due to its excellent mechanical strength, cold-weather toughness, and fabrication flexibility, S355J2 is used in a wide variety of structural and engineering applications.

✅ Common Uses:

• 🏗️ Building structures and bridges

• 🚧 Offshore structures and shipbuilding

• 🛠 Heavy-duty cranes and lifting equipment

• 🚚 Truck frames and chassis

• 🏢 Industrial frames and platforms

• 🛤 Railway wagons and infrastructure

• 🌉 Wind turbine towers and supports

📌 S355J2 is widely used in projects requiring structural reliability in cold climates or dynamic loading conditions.

🔁 Equivalent Grades of S355J2 Steel

🌍 S355J2 can substitute for ASTM A572 Gr.50 in many applications requiring weldable structural steel.

🧪 Weldability & Fabrication

S355J2 exhibits excellent weldability due to its low carbon equivalent. It can be welded using conventional methods like:

• Shielded Metal Arc Welding (SMAW)

• MIG/MAG welding

• Submerged Arc Welding (SAW)

• TIG Welding

✅ Preheating may be required for thicker sections or multi-pass welds.

💰 S355J2 Steel Price in India (Indicative)

📌 Prices vary depending on thickness, finish, quantity, and supplier location. Always request updated quotes with MTC.

🧭 Top S355J2 Steel Suppliers in India

Some trusted S355J2 stockists and manufacturers include:

• Triton Alloys Inc., Mumbai

• JSW Steel

• Jindal Steel & Power Ltd.

• SAIL (Steel Authority of India)

• Bhansali Inc., Gujarat

• Virwadia Steels, Chennai

• Mohan Steels, Delhi NCR

✅ Always ask for EN 10204 3.1 mill test certificates to ensure compliance with EN 10025-2 standards.

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✅ Conclusion

S355J2 carbon steel is a versatile and reliable structural steel grade ideal for demanding environments, especially in cold-weather conditions. Its combination of strength, toughness, and fabrication ease makes it a preferred material for construction, heavy machinery, and engineering structures.

Readily available in India and globally, S355J2 complies with EN 10025-2 standards and offers a cost-effective solution for high-performance structural needs.

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