S355J2+N Carbon Steel: Properties, Composition, Applications & Supplier Guide in India

S355J2+N carbon steel is a normalized grade of non-alloy structural steel defined under EN 10025-2, known for its high strength, excellent toughness, and superior weldability. The “+N” designation means the steel has been supplied in a normalized condition, improving its mechanical properties and structural integrity, especially for use in low-temperature and critical-load environments.

In this SEO-focused blog, we’ll explore everything you need to know about S355J2+N — including its chemical composition, mechanical properties, advantages over other grades, applications, price in India, and top suppliers.

🔍 What is S355J2+N Carbon Steel?

S355J2+N is part of the S355 structural steel family (S355JR, S355J0, S355J2, S355J2+N) and is specified under the EN 10025-2 standard. The “J2” stands for minimum impact energy of 27 Joules at -20°C, while the “+N” indicates normalizing, a heat treatment process that refines the grain structure for enhanced toughness and uniform mechanical properties.

It is ideal for critical structural applications where resilience, impact resistance, and weldability are required — such as bridges, offshore structures, power plants, cranes, and heavy equipment.

🧪 Chemical Composition of S355J2+N Steel

🔍 The controlled carbon and sulfur levels enhance weldability and reduce the risk of brittle fracture.

⚙️ Mechanical Properties of S355J2+N

💡 Normalization results in better toughness, ductility, and consistency across thicker sections compared to as-rolled steel.

🔩 What Does the “+N” in S355J2+N Mean?

The “+N” symbol signifies that the steel is normalized, i.e., heat-treated at ~900°C and cooled in air. This process:

• Refines grain structure

• Improves mechanical uniformity

• Reduces internal stresses

• Enhances toughness (especially at sub-zero temperatures)

📌 Normalized steel like S355J2+N is often preferred for structural applications with strict performance requirements.

🔁 S355J2+N vs Other Structural Grades

✅ S355J2+N is the most robust among the S355 series in terms of low-temperature impact resistance.

🧰 Applications of S355J2+N Steel

S355J2+N is a top choice for structural steel fabrication across industries where strength, weldability, and low-temperature resilience are essential.

✅ Key Applications:

• 🏗️ Steel bridges and infrastructure

• 🏢 Building frames and platforms

• 🚛 Chassis for heavy vehicles

• 🛳 Offshore rigs and marine structures

• 🏭 Industrial cranes and pressure supports

• 🛤 Railway bridges and support structures

• 🌪 Wind towers and renewable energy equipment

📌 It is also suitable for machining, cutting, and heavy-duty welded structures.

📦 Available Forms of S355J2+N Carbon Steel

• Hot Rolled Plates

• Flats & Bars (Round, Square)

• Angles, Channels, I-beams

• Forged Blocks (custom sizes)

• Hollow Sections (on request)

📏 Plate Thickness: 6 mm to 150 mm
📏 Bar Size: 20 mm to 350 mm diameter
📏 Standard Lengths: 6 m, 12 m, or cut to size

💰 S355J2+N Steel Price in India (Indicative)

📌 Prices depend on dimensions, mill origin, quantity, and delivery location. Ask for quotes with MTC.

🧭 Trusted S355J2+N Steel Suppliers in India

Some reliable sources for S355J2+N structural steel include:

• Triton Alloys Inc., Mumbai

• SAIL (Steel Authority of India)

• Jindal Steel & Power Ltd.

• JSW Steel

• Virwadia Steels, Chennai

• Bhansali Inc., Gujarat

• Mohan Steels, Delhi NCR

✅ Always ask for EN 10204 3.1 / 3.2 test certificates to ensure compliance.

⚙️ Welding & Fabrication

S355J2+N is highly weldable using:

• MIG / MAG

• SMAW

• Submerged Arc Welding (SAW)

• TIG

🛠 Low preheat or interpass temperatures are required due to its low carbon equivalent (~0.45%).

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✅ Conclusion

S355J2+N carbon steel is a premium-grade structural steel offering high strength, excellent impact resistance at sub-zero temperatures, and superior weldability — all thanks to its normalization process. Whether you’re constructing a bridge, fabricating a crane, or building offshore infrastructure, S355J2+N delivers performance, safety, and durability.

Available from top Indian steel manufacturers and global mills, S355J2+N is your go-to solution for critical structural components in harsh environments.

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