EN 10025 S355N Standard and Properties

EN 10025 S355N Standard and Properties

At Gangsteel, we’re thrilled to provide a comprehensive overview of the EN 10025 S355N standard and properties, detailing this high-strength, low-alloy structural steel under EN 10025-3. Renowned for its fine-grain structure, 355 MPa yield strength, and -20°C toughness, S355N is a top choice for structural applications like bridges, cranes, and building frameworks in moderate climates.

As part of the en 10025 3 normalized steel plate family, EN 10025 S355N delivers reliable performance. Gangsteel explores its standard specifications, chemical composition, mechanical properties, and applications, comparing it to grades like en 10025 3 s420n normalized structural steel plate and en 10025 3 s460n normalized structural steel plate. For more details, contact us or visit our en 10025 3 s355n normalized structural steel plate page.

What is EN 10025 S355N?

EN 10025 S355N is a high-strength, low-alloy structural steel under the EN 10025-3:2019 standard, with a minimum yield strength of 355 MPa for plates up to 16 mm thick. Its designation, also known as material number 1.0545, breaks down as:

• S: Structural steel.
• 355: Minimum yield strength in MPa.
• N: Normalized or normalized rolled, tested for impact toughness at -20°C.

The normalization process refines the grain structure, enhancing EN 10025 S355N’s strength, toughness, and weldability, making it ideal for moderate climates. Compared to en 10025 3 s460n normalized structural steel plate, S355N offers lower strength (355 MPa vs 460 MPa) but is more cost-effective for general structural applications.

EN 10025 S355N Standard Specifications

The EN 10025-3:2019 standard defines S355N’s requirements for:

• Chemical Composition: Strict limits on alloying elements to ensure weldability and toughness.
• Mechanical Properties: Minimum yield strength, tensile strength, elongation, and impact toughness.
• Delivery Conditions: Normalized or normalized rolled, with options for Z-quality testing.
• Testing: Ultrasonic testing (EN 10160), impact testing at -20°C, and certification per EN 10204.

S355N complies with European structural steel standards, ensuring reliability for global projects, similar to en 10025 3 s420n normalized structural steel plate.

Chemical Composition of EN 10025 S355N

Gangsteel ensures S355N meets EN 10025-3 chemical composition standards for optimal performance:

Carbon Equivalent (CEV): Capped at 0.43% for plates up to 63 mm, calculated as CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15, ensuring excellent weldability.

Mechanical Properties of EN 10025 S355N

Gangsteel guarantees EN 10025 S355N’s mechanical properties excel in structural applications:

• Yield Strength: Starts at 355 MPa for thin plates, ideal for moderate-load structures like bridges.
• Tensile Strength: 470-630 MPa ensures durability under tensile forces.
• Elongation: ≥22% supports complex structural designs, offering better ductility than higher-strength grades like S460N.
• Impact Toughness: ≥27 J at -20°C ensures reliability in moderate climates, comparable to en 10025 3 s355nl normalized structural steel plate.
• Hardness: Typically 150-190 HB (Brinell), balancing machinability and durability.
• Density: 7.85 g/cm³ (7850 kg/m³), standard for structural steels, aiding weight calculations.

Delivery Conditions and Specifications

Gangsteel provides EN 10025 S355N with specifications outlined in EN 10025-3:

• Standard: EN 10025-3:2019.
• Condition: Normalized or normalized rolled for consistent microstructure.
• Thickness Range: 6–200 mm, with custom options up to 250 mm.
• Widths: 2000, 2500, or 3000 mm.
• Lengths: Up to 12,000 mm.
• Surface: Hot-rolled, with optional priming for corrosion protection.
• Certifications: EN 10204 3.1/3.2 certificates, ultrasonic testing (UT) per EN 10160, and approvals from ABS, LR, BV, or DNV.
• Z-Quality: Optional Z15, Z25, or Z35 per EN 10164 for through-thickness properties, reducing lamellar tearing risk, similar to en 10025 3 s275n normalized structural steel plate.
• Tolerances: Per EN 10029 for precision.

Welding and Heat Treatment

EN 10025 S355N’s properties ensure excellent weldability:

• Welding: Compatible with GMAW and SAW per EN 1011-2. Preheating typically not required for plates <20 mm; optional for thicker plates (100-150°C); post-weld heat treatment (PWHT) at 550-650°C optional.
• Consumables: ER70S-6 for GMAW, EM12K flux with EH14 wire for SAW.
• Weld Quality: Low sulfur (0.025%) and phosphorus (0.030%) ensure reliable welds, matching en 10025 3 s355n normalized structural steel plate.

Applications Leveraging EN 10025 S355N Properties

Gangsteel supplies EN 10025 S355N for projects relying on its properties:

• Bridges: Load-bearing girders and beams in moderate climates, leveraging 355 MPa yield strength.
• Cranes: Structural components for lifting equipment, benefiting from 470-630 MPa tensile strength.
• Building Frameworks: Columns and trusses in temperate regions, supported by ≥22% elongation for complex designs.
• Heavy Machinery: Durable chassis components, relying on -20°C toughness.

For colder climates requiring -50°C toughness, consider en 10025 3 s355nl normalized structural steel plate.

Why Choose Gangsteel?

Gangsteel is your trusted source for EN 10025 S355N:

• Inventory: Extensive stock in China for rapid delivery.
• Sizes: Thicknesses from 6–200 mm, widths up to 3000 mm, lengths up to 12,000 mm.
• Delivery: Ships globally in 7-30 days.
• Certifications: EN 10204 3.1/3.2, UT testing (EN 10160), and ABS/LR/BV/DNV approvals.
• Processing: Cutting, welding, and bending tailored to your project needs.

Contact us for en 10025 3 s355n normalized structural steel plate.

FAQ

What is the EN 10025 S355N standard?
The EN 10025-3:2019 standard defines S355N as a high-strength, low-alloy steel with ≥355 MPa yield strength and -20°C toughness for structural applications.

What are the key properties of EN 10025 S355N?
EN 10025 S355N properties include ≥355 MPa yield strength, 470-630 MPa tensile strength, ≥22% elongation, and ≥27 J impact toughness at -20°C.

Is EN 10025 S355N weldable?
Yes, EN 10025 S355N’s CEV ≤0.43% enables easy welding with GMAW or SAW, often without preheating for thinner plates.

What applications use EN 10025 S355N properties?
EN 10025 S355N supports bridges, cranes, building frameworks, and heavy machinery in moderate climates, leveraging its strength and toughness.

How does EN 10025 S355N compare to S460N?
EN 10025 S355N has lower yield strength (355 MPa vs 460 MPa) than S460N but offers higher elongation (≥22% vs ≥17%) for better formability.

What certifications support EN 10025 S355N?
Gangsteel provides EN 10025 S355N with EN 10204 3.1/3.2, UT testing (EN 10160), and ABS/LR/BV/DNV approvals.

Summary

EN 10025 S355N is a high-strength, low-alloy structural steel under EN 10025-3:2019, offering a minimum yield strength of 355 MPa, tensile strength of 470-630 MPa, and -20°C toughness (≥27 J).

Its fine-grain structure, achieved through normalization, ensures excellent strength, toughness, and weldability for applications like bridges, cranes, building frameworks, and heavy machinery in moderate climates.

Gangsteel’s extensive inventory supports thicknesses from 6–200 mm, with global delivery in 7-30 days and certifications like EN 10204 3.1/3.2 and optional Z-quality (Z15, Z25, Z35).

Compared to S460N, S355N provides a cost-effective solution with superior ductility, making it a versatile choice for general structural projects in temperate regions.