Alloy S355

S355 – High-Strength Structural Steel for Demanding Constructions

S355 is a high-strength structural steel known for its excellent mechanical properties, high load-bearing capacity, and outstanding weldability. This material is ideal for demanding construction and manufacturing projects that require both stability and flexibility. The products in the S355 category offer a wide range of grades, dimensions, and shapes to meet the requirements of modern building and manufacturing processes.

Properties of S355

S355 is especially valued in applications where high strength and toughness are essential:

• Strength: Minimum yield strength of 355 MPa, ideal for load-bearing and dynamically stressed structures.
• Weldability: Excellent for all common welding methods without the need for preheating.
• Toughness: Remains durable even at low temperatures, making it suitable for use in cold environments.

Grades and Standards

S355 is available in different variants tailored to specific applications:

• S355JR (1.0045): Standard grade with toughness at room temperature.
• S355J0 (1.0553): Guaranteed toughness at 0 °C, suitable for cooler environments.
• S355J2 (1.0577): Improved toughness at -20 °C, ideal for dynamic loads and cold climates.
• S355K2 (1.0596): Guaranteed toughness at -20 °C with enhanced impact strength.

The products comply with international standards:

• EN 10025-2: Technical delivery conditions for non-alloy structural steels.
• EN 10204: Available with inspection certificates 2.1, 2.2 or 3.1 upon request.

Dimensions and Shapes

The S355 category includes a wide range of shapes and dimensions:

• Plates: Thicknesses from 5 mm to 200 mm for large-scale applications.
• Flat steel: Widths from 20 mm to 600 mm, suitable for various uses.
• Round steel: Diameters from 10 mm to 400 mm, perfect for precision manufacturing.
• Profile steel: H-, I-, and U-beams for load-bearing structures.

This diversity enables a tailored selection for any project – from large structural applications to precise mechanical components.

Typical Applications

Construction Industry

S355 is used in bridges, high-rise buildings, and industrial facilities where high load capacity and stability are essential.

Mechanical Engineering

Machine components, chassis, and frame constructions benefit from the material’s strength and toughness.

Heavy-Duty Structures

In crane and plant construction, S355 enables the production of durable and reliable systems capable of withstanding heavy loads.

Why Choose S355 from thyssenkrupp?

The products in the S355 category stand out for their quality, availability, and versatility. Thanks to adherence to international standards and the broad range of dimensions, they offer solutions perfectly suited to your project requirements. S355 is the optimal choice for construction and manufacturing projects that demand high strength and resilience under extreme conditions.

FAQ – S355