DIN EN 10025-2 S355J2+N Structural Steel Plates

DIN EN 10025-2 S355J2+N Structural Steel Plates supplier

Gangsteel, a globally recognized leader in manufacturing and exporting structural steel plates, supplies high-quality EN 10025-2 S355J2 steel plates, including the normalized S355J2+N variant, tailored for construction, bridges, and heavy machinery applications in industries such as infrastructure, shipbuilding, and offshore engineering. DIN EN 10025-2 is the European standard for hot-rolled structural steels, with S355J2+N offering superior strength, weldability, and impact resistance at low temperatures.

Gangsteel provides a comprehensive overview of S355J2+N structural steel plates, including chemical composition, mechanical properties, applications, and benefits, offering valuable insights for engineers, fabricators, and procurement specialists.

Introduction to DIN EN 10025-2 Standard

DIN EN 10025-2 specifies the technical delivery conditions for flat and long products of hot-rolled non-alloy structural steels. The standard covers grades like EN 10025-2 S235JR steel, EN 10025-2 S235J0, EN 10025-2 S235J2 steel, EN 10025-2 S275JR, EN 10025-2 S275J0 steel, EN 10025-2 S275J2 steel, EN 10025-2 S355JR steel, EN 10025-2 S355J2 steel, EN 10025-2 S355K2 steel, EN 10025-2 S355JR+N, EN 10025-2 S355J0, and EN 10025-2 S450J0 steel. Among these, S355J2+N stands out for its fine grain structure, improved machinability, and enhanced low-temperature impact resistance, making it suitable for structural components exposed to dynamic loads.

Gangsteel produces S355J2+N plates in compliance with DIN EN 10025-2, ensuring traceability and quality certification for global projects. The "+N" designation indicates normalization, a heat treatment process that refines the grain structure, improving toughness and uniformity. For related grades, explore EN 10025 S355J2G3 material steel plates and EN 10025 S355J2 N material, or refer to the BS EN 10025-2 material grade overview.

Chemical Composition of S355J2+N

The chemical composition of S355J2+N is tightly controlled to achieve optimal mechanical properties while maintaining weldability and formability. The table below outlines the typical composition per DIN EN 10025-2:

Key Notes:

• Carbon: Limited to 0.20% to ensure good weldability and prevent brittleness, critical for structural applications.
• Manganese: Up to 1.60% enhances strength and toughness without compromising ductility.
• Phosphorus and Sulfur: Low levels (0.030% P, 0.025% S) improve impact resistance, especially at subzero temperatures (tested at -20°C for S355J2).
• Silicon and Copper: Contribute to atmospheric corrosion resistance, making S355J2+N suitable for outdoor structures.

Gangsteel’s S355J2+N plates undergo stringent chemical analysis to meet DIN EN 10025-2 requirements, with options for additional testing such as ultrasonic inspection.

Mechanical Properties of S355J2+N

S355J2+N offers excellent mechanical properties, making it versatile for structural engineering. The table below summarizes its key properties per DIN EN 10025-2 (for plates up to 16 mm thickness):

Highlights:

• Yield Strength: Minimum 355 MPa ensures structural stability under heavy loads, ideal for bridges and buildings.
• Tensile Strength: The 470–630 MPa range provides robustness for dynamic applications.
• Elongation: 20% ductility supports forming and welding without cracking.
• Impact Toughness: 27 J at -20°C ensures performance in cold climates, distinguishing it from EN 10025-2 S355J0 (tested at 0°C).

Compared to lower grades like EN 10025-2 S275JR (yield 275 MPa) or EN 10025-2 S235JR (yield 235 MPa), S355J2+N offers higher strength, allowing for thinner plates and weight savings in designs.

Thickness Tolerance

Thickness tolerance for S355J2+N plates is governed by EN 10029, which specifies tolerances for hot-rolled plates 3 mm thick or above. For S355J2+N (non-alloy structural steel with ReH ≥ 360 N/mm²), the default is Class A, unless otherwise specified. The table below summarizes EN 10029 Class A thickness tolerances:

Key Notes:

• Class A: Standard tolerance for non-alloy steels; tighter classes (B, C, D) are available for precision applications.
• Measurement: Tolerances apply outside ground areas; for plates with trimmed edges, tolerances are measured at least 100 mm from the edge.
• Customization: Gangsteel offers plates with special tolerances upon request, ensuring compliance with EN 10029 for S355J2+N.

These tolerances ensure dimensional accuracy for structural applications, reducing fabrication issues.

Equivalent Material

S355J2+N has several equivalent materials in international standards, allowing for global sourcing and substitution. The table below details equivalent grades by country/standard:

Key Notes:

• ASTM A572 Gr 50: Closest US equivalent, with yield strength of 345 MPa (slightly lower than 355 MPa), but similar tensile properties.
• DIN ST52-3N: Offers equivalent low-temperature toughness, widely used in Europe.
• JIS SM490YA: Matches for hot-rolled structural steel, with good weldability.
• GB Q355D: Chinese equivalent, suitable for cold-forming and impact testing at -20°C.
• Selection Tip: Equivalents may vary slightly in chemical limits; verify with specific project requirements.

For more on equivalents, refer to Gangsteel’s ASME SA516 GR 70 Equivalent Grade guide.

Benefits of S355J2+N Structural Steel Plates

S355J2+N stands out in the DIN EN 10025-2 family for its balanced properties, offering several benefits:

1. High Strength-to-Weight Ratio: With a yield strength of 355 MPa, it enables lighter structures without sacrificing load-bearing capacity, reducing material costs in bridges and high-rise buildings.
2. Superior Low-Temperature Toughness: Tested at -20°C, S355J2+N performs reliably in cold environments, outperforming EN 10025-2 S355J0 and similar to EN 10025-2 S355K2 steel.
3. Excellent Weldability: Low carbon equivalent (CEV ≈ 0.45) allows welding without preheating in many cases, facilitating efficient fabrication for large structures.
4. Atmospheric Corrosion Resistance: Additions of silicon and copper provide better resistance to weathering, making it suitable for outdoor applications like offshore platforms.
5. Cost-Effectiveness: Offers higher strength than EN 10025-2 S275J2 steel or EN 10025-2 S235J2 steel, allowing for material savings while maintaining performance.
6. Compliance and Certification: Meets DIN EN 10025-2 and BS EN 10025-2 material grade requirements, with Gangsteel providing CE marking and EN 10204 3.1/3.2 certificates.

Weldability and Fabrication

S355J2+N exhibits excellent weldability due to its low carbon equivalent, compatible with standard processes like SMAW, GTAW, and SAW. Key considerations:

• Preheat: Minimal or no preheating required for plates up to 25 mm, reducing fabrication time.
• Post-Weld Heat Treatment (PWHT): Not typically needed, but recommended for thicker plates (>40 mm) to relieve stresses.
• Filler Materials: Use low-alloy fillers matching the strength of S355J2+N, such as E7018 or ER70S-6.
• Fabrication: High ductility (20% elongation) supports bending, rolling, and forming for complex structural components.

Gangsteel supplies S355J2+N in normalized conditions, enhancing grain refinement for improved fabrication performance.

Applications of S355J2+N Structural Steel Plates

S355J2+N is versatile and widely used in:

• Construction: For bridges, buildings, and stadiums, where high strength and low-temperature toughness are required.
• Offshore Engineering: In platforms and wind turbines, leveraging its corrosion resistance and impact toughness.
• Heavy Machinery: For cranes, excavators, and mining equipment, where durability under dynamic loads is critical.
• Shipbuilding: In hulls and superstructures, benefiting from its weldability and strength.
• Energy Sector: For pipelines and storage tanks, similar to EN 10025 S355J2G3 material steel plates but with enhanced low-temperature properties.

Gangsteel’s S355J2+N plates are available in thicknesses from 6–300 mm, with options for cut-to-size and cladding for specialized applications.

Why Choose Gangsteel for S355J2+N Plates?

Gangsteel is a global leader in supplying DIN EN 10025-2 S355J2+N plates, offering:

• Certified Quality: Plates undergo ultrasonic testing, Charpy impact tests at -20°C, and chemical analysis to meet EN 10025-2 standards.
• Customization: Available in thicknesses from 6–300 mm, with options for normalization (+N), cut-to-size, and beveling for efficient fabrication.
• Global Supply: Competitive pricing and reliable delivery from China to worldwide markets, with stock in key ports for fast turnaround.
• Technical Support: Expert guidance on selecting S355J2+N versus other grades like EN 10025-2 S355JR+N or EN 10025-2 S275J2 steel.

Gangsteel Solution

DIN EN 10025-2 S355J2+N structural steel plates offer exceptional strength, weldability, and low-temperature toughness, making them ideal for construction, offshore, and heavy machinery applications. Gangsteel’s high-quality S355J2+N plates ensure reliability and compliance with EN 10025-2 standards. For equivalent standards, explore our ASME SA516 GR 70 Equivalent Grade guide.

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