Our S275 mild steel round bar — also called round steel bar, steel round rod or round rod — is a hot-rolled solid bar supplied in 6m lengths or cut to size on request, in diameters from 6mm to 40mm. Strong, weldable and easy to machine, it is ideal for shafts, pins, balustrades, gates, brackets and general fabrication, with a 3-5 working day lead time to mainland UK.
Technical Specification
| Material | S275 mild steel |
| Profile | Solid round bar (rod) |
| Process | Hot-rolled |
| Length | 6m (full length), or cut to size on request |
| Diameters | 6mm up to 40mm |
| Finish | Standard mill finish (hot-rolled/black) |
| Weldability | Weldable, drillable and easily machined |
| Standard | BS EN 10025-2 |
| Lead time | 3-5 working days (mainland UK) |
Mild Steel Round Bar Sizes & Weight Chart
Full S275 mild steel round bar size chart with weight per metre. Every diameter is available in 6m lengths or cut to size.
| Diameter | Weight (kg/m) |
|---|---|
| 6mm | 0.22 |
| 8mm | 0.39 |
| 10mm | 0.62 |
| 12mm | 0.89 |
| 14mm | 1.21 |
| 16mm | 1.58 |
| 20mm | 2.47 |
| 22mm | 2.98 |
| 25mm | 3.85 |
| 30mm | 5.55 |
| 40mm | 9.86 |
Popular mild steel round bar sizes include 6mm, 8mm, 10mm, 12mm and 20mm round bar for shafts, pins and balustrades, up to 25mm, 30mm and 40mm round bar for heavier engineering. Weights are calculated from the section dimensions — for any size use our metal weight calculator.
Rackerman is a UK steel supplier: buy mild steel round bar — also known as round steel bar, steel round rod, metal round bar or hot rolled round bar — online with fast mainland UK delivery and cut-to-size service, a convenient alternative to a local steel stockholder near you.
Common Uses
Mild steel round bar is used for shafts, pins, dowels and spacers, balustrade and gate components, brackets and supports, security bars, handles and levers, decorative ironwork, and general fabrication and engineering. The solid round section welds, bends and turns readily.
Cutting, Machining and Fabrication
S275 round bar cuts, drills, welds, bends and turns with standard metalworking tools. We can also supply this bar cut to size on request — contact us before ordering with your required lengths.
Bright Bar Alternative
This is hot-rolled (black) round bar with a standard mill finish and looser tolerance, ideal for general fabrication. Where a smoother finish and closer tolerance are needed for machining or turning, see our bright mild steel round bar (EN3B).
Compare Our Round Bar Range
Choose the right round bar for the job: S275 mild steel round bar (6m) for general fabrication, the shorter 3m mild steel round bar for easy handling, bright EN3B round bar for machining, 6063 aluminium round bar for light weight and 304 stainless steel round bar for corrosion resistance. For a rounded handrail top, see our half round bar.
Related Mild Steel Sections
Explore the rest of our mild steel range: angle iron, flat bar, square bar, box section (SHS), rectangular hollow section (RHS) and steel channel. Work out weights with our metal weight calculator.
Delivery Information
Lead times are currently 3-5 working days to mainland UK. Round bar is supplied in 6m lengths, so suitable delivery access is required. If your order is long or heavy, please ensure someone is available to help with offloading on arrival. Contact us for a custom quote on bulk or trade quantities.