CHS Steel Sizes Chart | Standard Circular Hollow Section (CHS) Dimensions

1. What Are CHS Steel Sizes?

This CHS steel sizes chart lists standard CHS dimensions specified by outside diameter (OD) and wall thickness (WT). Standard sizes range from 21.3 mm to 457 mm in outside diameter, with wall thicknesses from 3.2 mm to 40 mm, depending on the applicable standard.

Eastern Steel supplies ERW Circular Hollow Sections (CHS) in a wide range of standard sizes manufactured to ASTM, EN, JIS, and GB specifications for structural, construction, and engineering applications. These standard circular hollow section sizes are suitable for a wide range of fabrication and structural projects.

2. Standard CHS Steel Sizes Chart

The standard CHS size chart below includes the most commonly used circular hollow section sizes for structural, construction, and mechanical applications.

For easier reference, the standard CHS dimensions below are grouped according to their typical structural applications.

Each chart lists standard CHS sizes and their corresponding theoretical weights for quick reference.

2.1 Small CHS Sizes (Ø21.3–88.9mm)

Commonly used for handrails, fencing, light structural frames, machinery frames and general fabrication

2.2 Medium CHS Sizes (Ø114.3–193.7 mm)

Suitable for structural columns, industrial buildings, equipment supports and medium-duty engineering projects.

2.3 Large CHS Sizes (Ø219.1–457 mm)

Designed for heavy structural applications including bridges, industrial buildings, infrastructure and large-span steel structures.

3. Most Common CHS Steel Sizes

The following sizes are among the most commonly specified for fabrication and engineering applications:

4. How to Read CHS Steel Sizes

CHS steel sizes are specified by their outside diameter (OD) and wall thickness (WT). For example, a 114.3 × 5 CHS has: - Outside Diameter (OD): 114.3 mm - Wall Thickness (WT): 5 mm The inside diameter (ID) can be calculated as: Inside Diameter = Outside Diameter − (2 × Wall Thickness) For a 114.3 × 5 CHS, the inside diameter is 104.3 mm. This designation is used throughout ASTM, EN, JIS, and GB standards for structural CHS.

5. Related Resources

CHS Steel Weight Chart — Theoretical weight by size and wall thickness.

CHS Steel — Product specifications, standards, steel grades, and applications.

Square Tube Sizes Chart (SHS) — Standard square hollow section dimensions and weights.

Rectangular Tube Sizes Chart (RHS) — Standard rectangular hollow section dimensions and weights.

6. FAQs

Q1: What are CHS steel sizes?

CHS steel sizes are specified by outside diameter (OD) and wall thickness (WT). Standard sizes typically range from 21.3 mm to 457 mm, with wall thicknesses from 3.2 mm to 40 mm.

Q2: What is the difference between CHS steel sizes and pipe sizes?

CHS steel is specified by its actual outside diameter and wall thickness, while steel pipe may also be designated by Nominal Pipe Size (NPS) depending on the applicable standard.

Q3: What are the most common CHS sizes?

Frequently used sizes include 48.3 × 3.2 mm, 60.3 × 3.2 mm, 76.1 × 3.2 mm, 114.3 × 5 mm, 168.3 × 8 mm, and 219.1 × 10 mm.

Q4: Can CHS steel tubes be customized?

Yes. CHS steel can be supplied in custom lengths, wall thicknesses, steel grades, and surface finishes according to project requirements.

Q5. What standards are CHS steel sizes available in?

CHS steel sizes are commonly manufactured to ASTM A500, ASTM A513, EN 10210, EN 10219, JIS G3466, and GB/T 6728.