Tianjin Brisk Steel is one of the EN 10210 Square Seamless Hollow Section in China. Our products are mainly exported to the Middle East, Southeast Asia, Europe, New Zealand, and other regions.If you would like to learn more about our products, feel free to contact us and send your purchase list.
Product Overview
The EN 10210 seamless square hollow section is manufactured according to the requirements of the EN 10210 series for hot-finished structural hollow sections. EN 10210-2 covers dimensional tolerances, shape requirements, and sectional properties for hot-finished square and rectangular hollow sections. The standard includes square sections with outside dimensions up to 800 × 800 mm and wall thicknesses up to 120 mm within its specified scope.
Square hollow sections provide four flat sides and a closed cross-section, giving them useful resistance to compression, bending, and torsional loading. They are commonly considered for structural frames, columns, supports, machinery structures, architectural steelwork, and other load-bearing applications.
Key Features
- Manufactured as a hot-finished seamless hollow section
- Square cross-sectional geometry for efficient structural design
- No longitudinal weld seam
- Suitable for structural and load-bearing applications
- Available in different steel grades, dimensions, and wall thicknesses depending on the order requirements
- Sectional properties can be used for structural design in accordance with the applicable standard
- Suitable for fabrication processes such as cutting, drilling, and welding when the selected steel grade and project requirements permit
Standard and Dimensional Requirements
For EN 10210 square hollow sections, dimensional and geometric requirements are specified in EN 10210-2. The standard covers outside dimensions, wall thickness, concavity and convexity, squareness, corner profile, twist, straightness, and mass.
For square and rectangular hollow sections, EN 10210-2 specifies an outside-dimension tolerance of ±1%, with a minimum of ±0.5 mm. The permitted wall-thickness deviation is generally -10%, subject to the specific provisions of the standard. Square sections also have requirements for squareness and corner profile.
When ordering, the buyer should confirm the required outside size, wall thickness, steel grade, length, surface condition, inspection requirements, and applicable edition of the standard rather than selecting a section based on nominal dimensions alone.
Applications
EN 10210 square seamless hollow sections are widely used in structural and engineering projects where strength, stability, and clean geometric performance are required. Thanks to their uniform square profile and seamless hot-finished construction, they perform well in both load-bearing and architectural applications.
Typical applications include:
- Structural columns and posts – commonly used in building frameworks where high compressive strength and stable vertical load transfer are required.
- Steel building frames – suitable for primary and secondary structural members in industrial buildings, warehouses, and commercial structures.
- Industrial equipment supports – used as support frames for heavy machinery, production lines, and mechanical systems that require rigid and durable steel structures.
- Mechanical and machinery structures – applied in equipment bases, brackets, and structural assemblies where vibration resistance and dimensional stability are important.
- Architectural steel structures – often selected for visible structural elements due to their clean square appearance and uniform load distribution characteristics.
- Bridges and infrastructure components – used in secondary structural parts, support systems, and reinforcement elements in civil engineering projects.
- Platforms and access structures – suitable for walkways, maintenance platforms, stair supports, and safety structures in industrial environments.
- Heavy-duty support frames – applied in high-load environments such as lifting systems, modular frames, and structural reinforcements.
- General fabrication and load-bearing structures – widely used in custom steel fabrication projects where versatility, weldability, and structural reliability are required.
The square hollow profile is especially advantageous in designs where uniform strength is needed in both principal directions. It also provides consistent connection surfaces, making it easier to integrate into welded or bolted structural systems while maintaining good torsional resistance and overall stability.
Frequently Asked Questions (FAQ)
Q: Is EN 10210 the same as EN 10219?
A: No. EN 10210 covers hot-finished structural hollow sections, while EN 10219 covers cold-formed welded structural hollow sections. They should not be treated as interchangeable standards.
Q: What is the difference between seamless and welded square hollow sections?
A: The primary difference is the manufacturing process. Seamless sections have no longitudinal weld, whereas welded sections are produced by forming and welding steel material. The appropriate product depends on the engineering and purchasing requirements.
Q: What steel grades are available for EN 10210 square hollow sections?
A: Common structural grades include S235JRH, S275J0H, S275J2H, S355J0H, and S355J2H, subject to the applicable material requirements and manufacturer capability. The required grade should be confirmed before ordering.
Q: Can EN 10210 square seamless hollow sections be welded?
A: They can be used in welded fabrication when the selected steel grade, material condition, welding procedure, and project requirements are suitable. Welding should follow an appropriate qualified procedure rather than relying solely on the product designation.
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