Circular Steel Tube (CHS)

1. CHS Steel Manufacturer & Supplier

Eastern Steel supplies CHS steel (Circular Hollow Section), also known as circular steel tube in many structural applications, for construction, mechanical, and industrial projects worldwide.

Manufactured using the Electric Resistance Welding (ERW) process, our CHS steel tubes are widely used as structural steel tubes for buildings, bridges, and industrial fabrication.

Whether you require standard stock sizes or project-specific specifications, we provide flexible production, custom lengths, and multiple surface finish options for distributors, contractors, fabricators, and OEM customers.

2. CHS Steel Specifications

Circular hollow section steel tubes are available in a wide range of outside diameters, wall thicknesses, steel grades, and international standards for structural, construction, and industrial applications.

3. Available Steel Grades

CHS steel is available in multiple international steel grades to meet different structural standards and project requirements.

3. Surface Finish Options

CHS steel tubes are available with different surface finishes to match the installation environment, corrosion requirements, and fabrication process.

Black steel is usually the most economical option when corrosion protection is not required or when the tube will be painted after fabrication.

Hot-dip galvanized CHS is generally recommended for outdoor structures where long-term corrosion resistance is required.

Pre-galvanized steel is suitable for light-duty applications where moderate corrosion protection is sufficient while maintaining a cleaner surface finish.

If the project specification already defines the coating system, the surface finish should always follow the engineering requirements.

4. Typical Applications

The combination of high strength, uniform load distribution, and excellent torsional rigidity makes CHS steel, also referred to as round hollow section steel in some markets, suitable for a wide range of structural and engineering applications.

Structural Steel Buildings

CHS steel is commonly specified for columns, roof trusses, and primary structural frames where loads are transferred from multiple directions. Its circular section provides high torsional stiffness while maintaining a clean architectural appearance.

Bridges and Infrastructure

Bridges, pedestrian walkways, lighting poles, traffic sign supports, and other public infrastructure frequently use CHS steel sections. The excellent strength-to-weight ratio helps reduce dead load without compromising structural capacity.

Industrial Equipment and Fabrication

Machine bases, conveyor systems, lifting equipment, safety barriers, storage racks, and custom fabrications all make extensive use of CHS steel. The round profile is easy to process by cutting, bending and welding, making it suitable for both standard production and bespoke fabrication.

Architectural Steelwork

Visible steelwork often favors circular hollow sections because the smooth profile creates a cleaner visual line than many other structural shapes. They are commonly found in canopies, stadium roofs, handrails, facades, and exposed structural members.

Offshore and Marine Projects

Offshore structures place much higher demands on durability than ordinary buildings. For this reason, CHS steel used in marine environments is normally supplied with hot-dip galvanizing or other protective coating systems to improve corrosion resistance and service life.

5. Ordering Information

To request a quotation for CHS steel tubes, please confirm the following specifications before placing an inquiry. This helps avoid specification mismatches and ensures the CHS steel meets your project requirements.

Typical ordering information includes:

- Outside Diameter (OD)

- Wall Thickness (WT)

- Length

- Steel Grade

- Manufacturing Standard

- Surface Finish

- End Type

- Inspection Requirements

- Order Quantity

If you're unsure about the required specifications, our team can recommend suitable sizes and grades based on your project requirements.

6. FAQs

Q1. How is CHS steel measured?

CHS steel is specified by its outside diameter (OD), wall thickness (WT), and length. These dimensions determine the section's weight, strength, and load-bearing capacity.

Q2. What standards apply to CHS steel?

CHS steel is manufactured to various international standards, including ASTM, EN, JIS, AS/NZS, and BS, depending on the application and project requirements.

Q3. Can CHS steel be galvanized?

Yes. CHS steel can be supplied with hot-dip galvanized, painted, or other protective finishes to improve corrosion resistance for outdoor and marine environments.

Q4. Can CHS steel be supplied in custom lengths?

Yes. In addition to standard stock lengths, many manufacturers can provide custom lengths, end preparations, and surface finishes to meet specific project requirements.

Q5. What is the difference between CHS steel and steel pipe?

Although both have a circular profile, CHS steel (circular hollow section) is designed for structural applications, while steel pipe is intended for fluid transportation and pressure service.

Q6. What information is needed to request a CHS steel quotation?

To receive an accurate quotation, provide the outside diameter, wall thickness, length, steel grade, quantity, and any required standard or surface finish. This helps ensure the correct product is supplied and priced accurately.

7. Related Resources

You may also find these resources useful when selecting CHS steel:

CHS Steel Sizes – Standard dimensions and available size ranges.

CHS Steel Weight Chart – Theoretical weight tables for common CHS sizes.

Square Tube vs Rectangular Tube (SHS vs RHS)– Compare the structural characteristics and applications of different hollow sections.

CHS Dimensions PDF – Download the standard CHS dimensions and wall thickness reference for offline use.

Square Tube HS Code (730661): SHS & RHS Customs Classification