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 EN 10025-2 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:

Element	Composition (% by weight)
Carbon (C)	0.20 max
Manganese (Mn)	1.60 max
Phosphorus (P)	0.030 max
Sulfur (S)	0.025 max
Silicon (Si)	0.55 max
Copper (Cu)	0.55 max
Nitrogen (N)	0.012 max
Iron (Fe)	Balance

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 EN 10025-2 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):

Property	Value
Yield Strength (min)	355 MPa
Tensile Strength	470–630 MPa
Elongation (min, 200 mm)	20%
Impact Toughness (Charpy V-notch)	27 J at -20°C
Hardness (HB, typical)	150–200 HB

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.

 

EN 10025-2 S355J2 N 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:

Nominal Thickness t (mm)	Tolerance (mm) Upper/Lower
t ≤ 3	±0.3
3 < t ≤ 5	±0.4
5 < t ≤ 8	±0.5
8 < t ≤ 15	±0.6
15 < t ≤ 25	±0.8
25 < t ≤ 40	±1.0
40 < t ≤ 80	±1.2
80 < t ≤ 100	±1.4
100 < t ≤ 150	±1.8
150 < t ≤ 200	±2.2
200 < t ≤ 250	±2.6

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.

EN 10025-2 S355+N 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:

Country/Standard	Equivalent Grade	Notes
USA (ASTM)	A572 Grade 50	Similar strength and weldability
Germany (DIN)	ST52-3N	Comparable toughness at -20°C
Japan (JIS)	SM490YA	Equivalent for structural use
China (GB)	Q355D	Matches yield strength and impact
France (AFNOR)	E36-3	Similar properties for construction
ISO	FE510D	General structural equivalent
UK (BS)	50D	Comparable for offshore applications

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 EN 10028-2 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 OF EN 10025-2 S355J2 N

 

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 EN 10025-2 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 EN 10025-2 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.

Long-Tail Keywords

 

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