Hollow Section

Closed section is a structural element that combines strength and precision. Used in a variety of construction and industrial projects, it is a symbol of reliability and durability. Thanks to the cold-bent process, our closed steel sections maintain excellent mechanical properties, while guaranteeing precise dimensions and a perfectly smooth surface.

Characteristics of closed sections

Closed section is a steel product used in many industrial sectors due to its special mechanical properties and geometry. They can be produced by hot rolling as well as cold bending. Cold-formed sections are more popular.

The cold-forming process takes place at a temperature below the austenitic transformation temperature of the steel. It is not heated before deformation. Cold forming increases the hardness and strength of the steel, but reduces its ductility. The process can lead to hardening of the steel due to stress. Cold forming produces a smoother and more aesthetically pleasing product surface, which is beneficial in many applications, especially where appearance is important. Because it is not affected by high temperatures, cold-formed steel often has more accurate dimensions and more uniform properties.

Hollow steel sections are available in a variety of dimensions, allowing builders to choose the right product according to project requirements.

Features and advantages of hollow sections

Features of hollow sections:

• Design - hollow sections have a uniform, closed structure, which can take square, rectangular or round forms.
• Material - they are usually made of steel that has passed rigorous quality tests.
• Dimensional tolerance - precise dimensions with small tolerances are characteristic of hollow sections.
• Surface finish - the surface is smooth and uniform, which is the result of a precise manufacturing process.

Advantages of hollow sections:

• Mechanical strength - due to their closed structure, the sections provide high bending and compression strength.
• Geometric stability - their design provides excellent shape stability, minimizing the risk of deformation under load.
• Protection from external factors - the closed construction protects the inside of the section from external factors such as moisture and corrosion.

Steel grades

We offer closed sections made of S235JRH and S355J2H steel.

S235JRH steel
Features:

• Chemical composition - low carbon steel with minimal additions of alloying elements.
• Yield strength - about 235 MPa.

Advantages:

• Good weldability - thanks to its low carbon content, this steel is easy to weld, which makes it possible to create complex structures.
• Flexibility - its mechanical properties make it suitable for many structural applications.
• Economy - this steel grade has a lower cost compared to more advanced alloys.

Disadvantages:

• Lower strength - it has a lower tensile strength limit compared to S355J2H.
• Less load resistance - in certain applications it may require additional reinforcements or combining with other materials.

S355J2H steel
Features:

• Chemical composition - steel with moderate carbon content with additions of alloying elements.
• Yield strength - about 355 MPa.

Advantages:

• High strength - higher yield strength compared to S235JRH, which allows for use in more demanding structures.
• Good weldability - despite its higher strength, this steel is still well weldable.
• Multipurpose - ideal for use in structures that require greater strength and durability.

Disadvantages:

• Cost - it is more expensive than S235JRH due to its more advanced chemical composition and better mechanical properties.

Both grades of steel are commonly used in the production of hollow sections due to their good mechanical properties and weldability. Choosing the right grade depends on the specific application and design requirements.

Applications of hollow sections

Hollow sections, which are an integral part of a wide range of structures, are characterized not only by excellent mechanical properties, but also by precision manufacturing and a variety of available dimensions. Below are the main applications of these products in industry and construction:

• Construction of machinery and equipment - closed steel profile is often used in industrial machinery, where precise dimensions and stability are the key to efficient and safe operation.
• Construction - closed section is an important component in steel structures such as industrial halls, bridges and overpasses. High strength and weather resistance make hollow sections ideal for building durable structures.
• Automotive industry - hollow steel sections are used in the production of automotive parts, especially where high strength and lightness are required.
• Pipe systems - hollow sections are used as covers and conduits in pipe systems, providing tightness and corrosion resistance.
• Racks and frames - the dimensions of hollow steel sections are customized, allowing their use in the manufacture of racks, frames or supports in various industries.

The right choice of hollow section, tailored to the specific requirements of the project, can significantly affect the quality, strength and durability of the final structure. Feel free to contact us for more detailed information on our offer.

Advice for investors

• Determine requirements - before you make a purchase, carefully determine the needs of your project. Closed steel profile is available in a variety of dimensions, so consider what sections will be right for you.
• Know the material - make sure you choose hollow steel sections with the right quality of steel. The chemical composition and mechanical properties can significantly affect the performance and durability of the section in your project.
• Check dimensional tolerances - for many applications, dimensional precision can be crucial. Pay attention to the dimensional tolerances of the sections to make sure they meet your expectations.
• Ask about additional services - cutting, bending, section surface treatment.
• Delivery and logistics - set up a delivery date and shipping terms with us. Closed sections may require specialized transportation to reach you intact.

Storage of hollow sections

Proper storage of steel sections is key to maintaining their quality and functionality. Our recommendations:

• Flat and stable surface - make sure that hollow steel sections are stored on a flat, level and stable surface that is capable of supporting their weight.
• Corrosion protection - to prevent corrosion, closed steel section should be stored in a dry and well-ventilated place. It is also recommended to regularly check and remove any signs of moisture or condensation.
• Shelf spacing - if sections are stored on shelves, make sure that the distance between them allows for easy access and handling, while minimizing the risk of damage.
• Location - hollow steel sections with a larger dimension should be located at the bottom and smaller sections at the top to ensure stability and security.

Did you know

• Hollow sections, although often associated with steel structures, are also used in the automotive industry, aviation or even in the production of sports equipment, where lightness and strength are important.
• Modern manufacturing processes make it possible to create hollow sections with extremely precise dimensions. Production tolerances for these components can be as low as a few hundredths of a millimeter.
• Advanced technologies make it possible to produce hollow sections in unusual, non-standard shapes, making it possible to customize them to meet specific project needs.
• Hollow sections are often produced using advanced welding techniques, which guarantees their high quality and material consistency.
• The steel from which hollow sections are manufactured is one of the most recycled materials in the world. It can be remelted and reused many times without losing its key properties.

Hollow sections - why with us?

When you decide to buy from our online wholesaler, you are investing in the highest quality. Each closed profile has been carefully selected to meet the expectations of even the most demanding customers.

We are not just a supplier - we are your partner in realizing your vision. Our team of specialists is always on hand to help you choose the right product to suit your individual needs. We provide professional support at every stage of purchase and delivery. We invite you to take advantage of our rich offer!

FAQ

What are the dimensions of closed profiles?
A closed profile is a steel section with a closed cross-section, most often in the form of a square, rectangle or circle. They are available in a variety of dimensions that are customized to meet specific construction requirements.

Here are some examples of the dimensions of hollow sections:
1.square sections - the most common dimensions are from 10x10 mm to 300x300 mm, but larger sizes are available by special order.
2.rectangular sections - typical dimensions are, for example, 20x10 mm, 40x20 mm, 100x50 mm, 200x100 mm, etc.
3.round sections (tubes) - can have a diameter of several to several hundred millimeters, depending on the application.

The wall thickness of the section is also variable and depends on the design requirements and application. In general, the higher the load, the thicker the profile wall should be.