S355N Material Properties in Detail

S355N Material Properties in Detail

At Gangsteel, we’re excited to provide a detailed exploration of S355N material properties, showcasing 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, S355N delivers reliable performance. Gangsteel delves into its chemical composition, mechanical properties, delivery conditions, 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 S355N Steel?

S355N is a high-strength, low-alloy structural steel under EN 10025-3:2019, 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 S355N material properties for 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.

Chemical Composition Supporting S355N Material Properties

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, similar to en 10025 3 s420n normalized structural steel plate.

Mechanical Properties of S355N Steel

Gangsteel guarantees S355N material properties meet high-strength application needs:

• Yield Strength: Starts at 355 MPa for thin plates, ideal for moderate-load structures like bridges.
• Tensile Strength: 470-630 MPa ensures durability under high 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.

These properties make S355N versatile for structural applications requiring a balance of strength and formability.

Delivery Conditions and Specifications

Gangsteel provides 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

S355N material properties include excellent weldability with a low CEV (≤0.43%):

• 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: Matches en 10025 3 s355n normalized structural steel plate for reliable, high-strength joints.

Applications Leveraging S355N Material Properties

Gangsteel supplies S355N for projects that rely on its properties:

• Bridges: Load-bearing components like girders and beams in moderate climates, leveraging 355 MPa yield strength.
• Cranes: Structural parts 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 components like chassis in industrial equipment, 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 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 are S355N material properties?
S355N material properties include a yield strength of ≥355 MPa, tensile strength of 470-630 MPa, ≥22% elongation, ≥27 J impact toughness at -20°C, and 7.85 g/cm³ density.

How do S355N material properties perform in moderate climates?
S355N’s ≥27 J impact toughness at -20°C ensures reliability for bridges and cranes in temperate environments.

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

What applications leverage S355N material properties?
S355N material properties support bridges, cranes, building frameworks, and heavy machinery in moderate climates, leveraging high strength and ductility.

How do S355N material properties compare to S460N?
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 S355N material properties?
Gangsteel provides S355N with EN 10204 3.1/3.2, UT testing (EN 10160), and ABS/LR/BV/DNV approvals for global compliance.

Summary

S355N is a high-strength, low-alloy structural steel under EN 10025-3, offering a minimum yield strength of 355 MPa, tensile strength of 470-630 MPa, ≥22% elongation, and ≥27 J toughness at -20°C.

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.