Mild Steel Flat Bar – S275, 6m Lengths & Cut to Size, Solid Steel Flat Bar for Fabrication, Frames, Brackets, Fencing & Gates
Mild Steel Flat Bar – S275, 6m Lengths & Cut to Size, Solid Steel Flat Bar for Fabrication, Frames, Brackets, Fencing & Gates
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Our S275 mild steel flat bar — also called flat steel bar, steel flat bar or engineering flat bar — is a hot-rolled solid flat section supplied in 6m lengths or cut to size on request, in widths from 20mm up to 300mm and thicknesses from 3mm to 20mm. A versatile, weldable bar ideal for brackets, straps, frames, fencing, gates, lintels and general fabrication, with a 3-5 working day lead time to mainland UK.
Technical Specification
| Material | S275 mild steel |
| Profile | Solid flat bar (rectangular section) |
| Process | Hot-rolled |
| Length | 6m (full length), or cut to size on request |
| Widths | 20mm up to 300mm |
| Thicknesses | 3mm - 20mm (width dependent) |
| Finish | Standard mill finish |
| Standard | BS EN 10025-2 |
| Lead time | 3-5 working days (mainland UK) |
Mild Steel Flat Bar Sizes & Weight Chart
Full S275 mild steel flat bar size chart with weight per metre (width x thickness). Every size is available in 6m lengths or cut to size.
| Size (width x thickness) | Weight (kg/m) |
|---|---|
| 20 x 3mm | 0.47 |
| 20 x 5mm | 0.78 |
| 20 x 6mm | 0.94 |
| 20 x 8mm | 1.26 |
| 20 x 10mm | 1.57 |
| 25 x 3mm | 0.59 |
| 25 x 5mm | 0.98 |
| 25 x 6mm | 1.18 |
| 25 x 8mm | 1.57 |
| 25 x 10mm | 1.96 |
| 25 x 12mm | 2.35 |
| 30 x 3mm | 0.71 |
| 30 x 5mm | 1.18 |
| 30 x 6mm | 1.41 |
| 30 x 8mm | 1.88 |
| 30 x 10mm | 2.35 |
| 30 x 12mm | 2.83 |
| 40 x 3mm | 0.94 |
| 40 x 5mm | 1.57 |
| 40 x 8mm | 2.51 |
| 40 x 10mm | 3.14 |
| 40 x 12mm | 3.77 |
| 40 x 15mm | 4.71 |
| 40 x 20mm | 6.28 |
| 50 x 3mm | 1.18 |
| 50 x 5mm | 1.96 |
| 50 x 6mm | 2.35 |
| 50 x 8mm | 3.14 |
| 50 x 10mm | 3.92 |
| 50 x 12mm | 4.71 |
| 50 x 15mm | 5.89 |
| 60 x 6mm | 2.83 |
| 60 x 8mm | 3.77 |
| 60 x 10mm | 4.71 |
| 60 x 12mm | 5.65 |
| 60 x 15mm | 7.06 |
| 70 x 6mm | 3.30 |
| 70 x 8mm | 4.40 |
| 70 x 10mm | 5.49 |
| 75 x 6mm | 3.53 |
| 75 x 10mm | 5.89 |
| 75 x 12mm | 7.06 |
| 80 x 6mm | 3.77 |
| 80 x 8mm | 5.02 |
| 80 x 10mm | 6.28 |
| 80 x 12mm | 7.54 |
| 80 x 15mm | 9.42 |
| 90 x 6mm | 4.24 |
| 90 x 8mm | 5.65 |
| 90 x 10mm | 7.06 |
| 100 x 5mm | 3.92 |
| 100 x 6mm | 4.71 |
| 100 x 8mm | 6.28 |
| 100 x 10mm | 7.85 |
| 100 x 12mm | 9.42 |
| 100 x 15mm | 11.77 |
| 100 x 20mm | 15.70 |
| 120 x 6mm | 5.65 |
| 120 x 10mm | 9.42 |
| 120 x 12mm | 11.30 |
| 130 x 6mm | 6.12 |
| 130 x 10mm | 10.20 |
| 150 x 6mm | 7.06 |
| 150 x 8mm | 9.42 |
| 150 x 10mm | 11.77 |
| 150 x 12mm | 14.13 |
| 150 x 15mm | 17.66 |
| 150 x 20mm | 23.55 |
| 180 x 6mm | 8.48 |
| 180 x 10mm | 14.13 |
| 180 x 12mm | 16.96 |
| 200 x 6mm | 9.42 |
| 200 x 8mm | 12.56 |
| 200 x 10mm | 15.70 |
| 200 x 12mm | 18.84 |
| 200 x 15mm | 23.55 |
| 200 x 20mm | 31.40 |
| 250 x 6mm | 11.77 |
| 250 x 8mm | 15.70 |
| 250 x 10mm | 19.62 |
| 250 x 12mm | 23.55 |
| 250 x 15mm | 29.44 |
| 300 x 6mm | 14.13 |
| 300 x 8mm | 18.84 |
| 300 x 10mm | 23.55 |
| 300 x 12mm | 28.26 |
| 300 x 15mm | 35.32 |
Popular mild steel flat bar sizes include 20mm, 25mm, 40mm and 50mm flat bar in 3mm, 5mm and 6mm thicknesses for brackets, straps and light frames, through 75mm and 100mm flat bar, up to wide 150mm, 200mm and 300mm flat bar for structural and engineering work. Weights are calculated from the section dimensions — for any size use our metal weight calculator.
Rackerman is a UK steel supplier: buy mild steel flat bar — also known as flat steel bar, flat metal bar, hot rolled flat bar, engineering flat bar or steel strip — online with fast mainland UK delivery and cut-to-size service, a convenient alternative to a local steel flat bar supplier near you. Offcuts are included free with every cut.
Common Uses
Mild steel flat bar is used for brackets, straps, cleats and packers, frame reinforcement and bracing, gate and railing components, lintel and shelf supports, machine bases, fixing plates, fencing, banding and general fabrication. The solid flat profile lends itself to bolted and welded connections and is easy to drill, cut and shape.
Cutting, Bending & Fabrication
S275 flat bar cuts, drills and welds readily with standard metalworking tools. Thinner bar bends in a vice or bending jig; thicker sections need a press brake or heat. We can also supply this flat bar cut to size on request — leave your cutting list at checkout and all offcuts are included free.
Finish and Protection
Supplied in standard mill finish, which may show light mill scale, handling marks or surface oxidation — normal for untreated steel. For outdoor, fencing or exposed work, clean, prime and paint the bar, or choose our galvanised steel flat bar, the same solid flat section with a hot-dip zinc coating for corrosion resistance.
Compare Our Flat Bar Range
Choose the right flat bar for the job: mild steel flat bar for general fabrication, galvanised flat bar for outdoor and corrosion resistance, and lightweight 6063 aluminium flat bar for trims, edging and marine work.
Related Mild Steel Sections
Part of our full mild steel range: angle iron, square bar, round 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. Flat 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.
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FREQUENTLY ASKED QUESTIONS
What sizes of mild steel flat bar are available?
Various widths and thicknesses in 6m lengths. Check the product page for the full range.
What is flat bar used for?
Brackets, straps, cleats, frame reinforcement, gate components, lintel supports, machine bases, shelving supports, banding and general fabrication. The flat profile lends itself to bolted and welded connections.
Can flat bar be bent?
Yes. Thinner flat bar bends in a vice or on a bending jig. Thicker sections need a press brake or heat bending. S275 has good formability.
What is S275 flat bar?
S275 is the standard UK structural mild steel grade to BS EN 10025-2. Minimum 275 MPa yield strength, weldable and suitable for general construction and fabrication.
How is 6m flat bar delivered?
Delivered within 3-5 working days to mainland UK. 6m lengths require suitable vehicle access.
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) 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.