Mild Steel Circular Hollow Section CHS – S235, 7.5m Lengths & Cut to Size, Round Steel Tube for Columns, Posts, Handrails & Fabrication
Mild Steel Circular Hollow Section CHS – S235, 7.5m Lengths & Cut to Size, Round Steel Tube for Columns, Posts, Handrails & Fabrication
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Our S235 mild steel circular hollow section (CHS) — also known as round steel tube or tubular steel — is supplied in full 7.5m lengths or cut to size on request, in outside diameters from 21.3mm up to 168.3mm and wall thicknesses from 2.5mm to 5mm. With even strength in all directions, CHS is ideal for columns, posts, structural frameworks, handrails and tube fabrication, with a 3-5 working day lead time to mainland UK.
Technical Specification
| Material | S235 mild steel |
| Profile | Circular hollow section (CHS) / round steel tube |
| Length | 7.5m full length, or cut to size on request |
| Diameters available | 21.3mm up to 168.3mm OD |
| Wall thicknesses | 2.5mm - 5mm (size dependent) |
| Finish | Standard mill finish |
| Weldability | Weldable, drillable and easily fabricated |
| Standard | Cold formed to EN 10219 |
| Lead time | 3-5 working days (kerbside, mainland UK) |
Steel Tube (CHS) Sizes & Weight Chart
Full S235 circular hollow section size chart with nominal weight per metre (outside diameter x wall). Every size is available in 7.5m lengths or cut to size.
| Size (OD x wall) | Weight (kg/m) |
|---|---|
| 21.3 x 3mm | 1.35 |
| 26.9 x 2.5mm | 1.50 |
| 26.9 x 3mm | 1.77 |
| 60.3 x 3mm | 4.24 |
| 76.1 x 3mm | 5.41 |
| 88.9 x 3mm | 6.36 |
| 88.9 x 5mm | 10.35 |
| 114.3 x 3mm | 8.23 |
| 114.3 x 3.5mm | 9.56 |
| 114.3 x 5mm | 13.48 |
| 139.7 x 5mm | 16.61 |
| 168.3 x 5mm | 20.14 |
Popular steel tube sizes include 21mm, 27mm and 60mm CHS for handrails and posts, up to 114mm, 140mm and 168mm circular hollow section for structural columns. Weights are nominal mass per metre — for any size use our metal weight calculator.
Rackerman is a UK steel supplier: buy mild steel circular hollow section — also known as CHS, round steel tube, mild steel tube or tubular steel — online with fast mainland UK delivery and cut-to-size service, a convenient alternative to a local steel tube supplier near you.
Common Uses
Circular hollow section is widely used for structural columns and posts, support frames, bracing members, handrails and balustrades, gate and railing fabrication, agricultural structures and general structural tube work. Its round profile gives uniform strength in all directions.
Circular vs Box and Rectangular Section
Circular hollow section (CHS) gives even strength in all directions, ideal for columns, posts and handrails. Square box section (SHS) and rectangular hollow section (RHS) have flat faces that are easier to join and weld for frames and load-bearing spans. Choose CHS where a round profile or uniform strength is required.
Finish and Protection
Supplied in standard mill finish. The surface may show normal mill scale, handling marks or light surface oxidation, typical for untreated steel. For outdoor or moisture-exposed use, clean, prime and protect with a suitable paint or coating system, or choose our galvanised steel tube.
Cutting and Fabrication
S235 circular hollow section can be cut, drilled, welded and fabricated using suitable metalworking tools. Cut ends and drilled holes should be protected if used outside or in damp conditions.
Compare Our Steel Tube Range
Choose the right tube for the job: mild steel CHS (7.5m, 21-168mm) for structural work, ERW mild steel round tube (12-38mm) for lighter frames and handrails, galvanised steel tube for outdoors, lightweight 6063 aluminium round tube, and 304/316 stainless steel tube for handrail, balustrade and marine work. Browse the full steel tube & pipe collection.
Delivery Information
Lead times are currently 3-5 working days. Delivery is kerbside only and our vehicles do not carry HIAB or lifting equipment - steel must be safely offloaded by the customer on arrival. Sections are supplied in full 7.5m lengths, so suitable delivery access is required.
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FREQUENTLY ASKED QUESTIONS
What diameters of circular hollow section are available?
Our circular hollow section (CHS) is available in outside diameters from 21.3mm up to 168.3mm, in wall thicknesses from 2.5mm to 5mm depending on the size. All sections are supplied in full 7.5m lengths in S235 mild steel.
What grade is your circular hollow section?
Our circular hollow section is supplied in S235 mild steel, a commonly specified general-purpose structural grade suitable for welding, cutting, drilling and fabrication. For exact section properties and tolerances, refer to the applicable mill certificate or BS EN standard for your application.
What is circular hollow section used for?
Circular hollow section (CHS), also known as steel tube, gives even strength in all directions, making it ideal for columns, support posts, structural frameworks, bracing, handrails, gate and railing fabrication and general structural tube work.
Can circular hollow section be cut and welded?
Yes - S235 circular hollow section can be cut, drilled, welded and fabricated using suitable metalworking tools and correct preparation. Cut ends and drilled holes should be protected if the section will be used outside or in damp conditions. Always use suitable protective equipment when working steel.
Can I get circular hollow section cut to size?
Yes. As well as full 7.5m lengths, we can cut CHS to your required lengths before dispatch - send us your cutting list and we'll confirm price and lead time.
How is circular hollow section delivered?
Lead times are currently 3-5 working days. Sections are supplied in full 7.5m lengths, so suitable delivery access is required. Delivery is kerbside only and our vehicles do not carry HIAB or lifting equipment - steel must be safely offloaded by the customer on arrival.
MONEY BACK GUARANTEE
Here at Rackerman, we take customer satisfaction very seriously. If you are unsatisfied with the quality of your product, please email us info@rackerman.co.uk or give us a call: 01665 497513 and we will make it right.
SHIPPING
It should take no longer than 1-2 business day to process your order, then 3-5 working days (5-10 working days on RSJs + Chippings) to then receive your order from us after dispatch.
If you haven't received your items in this time frame, please contact us.
RETURNS
If you are unsatisfied with your purchase, that's completely fine! We offer a 30 day money back guarantee to all customers, no questions asked! Please contact us to arrange a return.