BS EN 10025-3 S355N Steel Overview

BS EN 10025-3 S355N Steel Overview

At Gangsteel, we’re delighted to provide a comprehensive overview of BS EN 10025-3 S355N, a high-strength, low-alloy structural steel under the EN 10025-3 standard, harmonized across Europe and referenced by British Standards (BS). Renowned for its fine-grain structure, 355 MPa yield strength, and -20°C toughness, S355N is a preferred choice for structural applications like bridges, cranes, and building frameworks in moderate climates.

As part of the en 10025 3 normalized steel plate family, BS EN 10025-3 S355N delivers reliable performance. Gangsteel explores its 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 BS EN 10025-3 S355N?

BS EN 10025-3 S355N is a high-strength structural steel under the EN 10025-3:2019 standard, adopted by British Standards (BS) for use in the UK and Europe. 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 BS EN 10025-3 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.

Chemical Composition of BS EN 10025-3 S355N

Gangsteel ensures BS EN 10025-3 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 BS EN 10025-3 S355N

Gangsteel guarantees BS EN 10025-3 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.

Delivery Conditions and Specifications

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

• Standard: EN 10025-3:2019, adopted by British Standards (BS).
• 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

BS EN 10025-3 S355N specifications ensure 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 BS EN 10025-3 S355N

Gangsteel supplies BS EN 10025-3 S355N for projects that rely on its specifications:

• 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 BS EN 10025-3 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 BS EN 10025-3 S355N?
BS EN 10025-3 S355N is a high-strength structural steel under EN 10025-3, with ≥355 MPa yield strength and -20°C toughness, ideal for bridges and cranes in moderate climates.

What are the key properties of BS EN 10025-3 S355N?
BS EN 10025-3 S355N offers a yield strength of ≥355 MPa, tensile strength of 470-630 MPa, ≥22% elongation, and ≥27 J impact toughness at -20°C.

Is BS EN 10025-3 S355N weldable?
Yes, BS EN 10025-3 S355N’s CEV ≤0.43% enables easy welding with GMAW or SAW, often without preheating for thinner plates.

What applications use BS EN 10025-3 S355N?
BS EN 10025-3 S355N is used in bridges, cranes, building frameworks, and heavy machinery in moderate climates, leveraging high strength and ductility.

How does BS EN 10025-3 S355N compare to S460N?
BS EN 10025-3 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 BS EN 10025-3 S355N?
Gangsteel provides BS EN 10025-3 S355N with EN 10204 3.1/3.2, UT testing (EN 10160), and ABS/LR/BV/DNV approvals for global compliance.

Summary

BS EN 10025-3 S355N is a versatile, high-strength structural steel ideal for moderate climates, offering a minimum yield strength of 355 MPa, tensile strength of 470-630 MPa, and excellent -20°C toughness (≥27 J). Its fine-grain structure, achieved through normalization, ensures robust performance in bridges, cranes, building frameworks, and heavy machinery.

Gangsteel’s extensive inventory supports thicknesses from 6–200 mm, with custom options up to 250 mm, and global delivery in 7-30 days. Certifications like EN 10204 3.1/3.2 and optional Z-quality (Z15, Z25, Z35) enhance reliability for critical applications.

Compared to higher-strength grades like S460N, S355N provides a cost-effective solution with superior ductility (≥22% elongation), making it a go-to choice for general structural projects. Contact Gangsteel for tailored solutions and precise specifications to meet your project needs.