Carbon Steel Hollow Sections: Engineered for Strength & Versatility

Carbon Steel Hollow Sections (CHS, RHS, SHS), also known as Structural Hollow Sections (SHS), are fundamental components in modern construction and engineering. Recognized for their exceptional strength-to-weight ratios and aesthetic appeal, these versatile structural elements offer superior performance in various demanding applications. Their closed, symmetrical profiles — available in square (SHS), rectangular (RHS), and circular (CHS) shapes — significantly enhance resistance to torsional and bending forces, making them a preferred choice for architects, engineers, and fabricators worldwide.

Key Features & Advantages:

• High Strength-to-Weight Ratio: Maximizes structural efficiency while minimizing material usage and overall project weight.
• Superior Torsional Rigidity: The closed section provides excellent resistance to twisting and bending, crucial for columns, trusses, and frames.
• Design Versatility: Available in a wide range of sizes and thicknesses, accommodating diverse architectural and structural designs. Their clean lines also lend themselves to exposed architectural elements.
• Ease of Fabrication: Carbon steel hollow sections are highly amenable to welding, cutting, drilling, and other fabrication processes, streamlining construction timelines.
• Cost-Effectiveness: Their inherent strength often allows for the use of smaller sections, leading to material savings. Long lifespan, especially when coated, reduces maintenance costs.
• Enhanced Corrosion Resistance (with Treatment): Can be readily coated, galvanized, or painted to extend lifespan and maintain integrity in challenging environmental conditions.

Material & Manufacturing Standards:

Baoli Iron Steel’s Carbon Steel Hollow Sections are primarily manufactured from high-grade carbon steels, ensuring optimal performance and durability. Common steel grades include:

• European Standards (EN 10210 / EN 10219):
  • S235JRH: General structural applications, good weldability.
  • S275J0H / S275J2H: Higher strength for more demanding structural uses.
  • S355J0H / S355J2H / S355K2H: High-strength steel for critical structural elements and heavy load applications.
• American Standards (ASTM A500):
  • Grade B: Common for general structural purposes.
  • Grade C: Higher yield strength, suitable for more stringent applications.
• Manufacturing Processes: Available as Hot-Finished Structural Hollow Sections (HFS, conforming to EN 10210, characterized by excellent uniformity and reduced residual stresses) and Cold-Formed Structural Hollow Sections (CFS, conforming to EN 10219, offering tighter dimensional tolerances and a smoother surface finish).

Typical Applications:

• Building & Construction: Columns, beams, trusses, frameworks for industrial, commercial, and residential buildings.
• Infrastructure: Bridges, pedestrian walkways, highway gantries, and support structures.
• Machinery & Equipment: Frames for agricultural machinery, lifting equipment, vehicle chassis, and conveyor systems.
• Architectural Elements: Exposed structural components, handrails, balustrades, and aesthetic features.
• Offshore Structures: Support legs, platforms, and bracing for oil and gas installations.
• Sporting & Recreational Facilities: Grandstand structures, lighting masts.

Common Dimensions & Specifications:

Baoli Iron Steel offers an extensive range of standard and custom dimensions to meet specific project requirements.

• Square Hollow Sections (SHS):
  • Side Length: Typically from 20x20mm up to 400x400mm.
  • Wall Thickness: Ranging from 2.0mm to 20.0mm.
• Rectangular Hollow Sections (RHS):
  • Side Dimensions: From 30x20mm up to 500x300mm (or larger custom sizes).
  • Wall Thickness: Ranging from 2.0mm to 20.0mm.
• Circular Hollow Sections (CHS):
  • Outer Diameter (OD): Typically from 21.3mm up to 508mm.
  • Wall Thickness: Ranging from 2.0mm to 20.0mm.
• Length: Standard lengths often include 6 meters, 12 meters, or cut-to-length options.
• All dimensions conform to relevant international standards (e.g., EN 10210, EN 10219, ASTM A500) for dimensional tolerances and material properties.

Surface Finishes:

To protect against corrosion and enhance longevity, various surface treatments are available:

• Black (Self-Colour): Untreated, suitable for indoor use or where further finishing will be applied.
• Pre-Galvanized: Zinc coating applied during manufacturing for basic corrosion protection.
• Hot-Dip Galvanized: Superior corrosion resistance achieved by immersing the fabricated section in molten zinc.
• Painted/Primed: Applied primer or topcoat for specific color requirements or enhanced protection.