Where it's used
One versatile sheet for fabrication, construction and repairs — swipe through real settings for S275 mild steel sheet.
Which thickness do you need?
Fifteen gauges from 0.8mm to 20mm — cold-rolled CR4 sheet up to 2.5mm, S275 structural plate from 3mm. Tap a range to see what it's built for.
CR4 cold-rolled sheet vs S275 plate — which grade you're getting
This listing covers two different materials. The thin gauges are cold-rolled sheet; 3mm and up are hot-rolled structural plate — not the same steel. Here's the difference so you order the right one.
CR4 / DC01 — Cold-Rolled Sheet
Rolled cold at room temperature to BS EN 10130. Smooth, clean surface with no mill scale, tight thickness tolerances and excellent formability — it folds, presses and bends without cracking. Low-carbon (≤0.12% C), so it works easily but is a forming grade, not a structural one.
Best for: panels, enclosures, machine guards, ducting, brackets, automotive repair and anything cut, folded or powder-coated.
S275 — Hot-Rolled Structural Plate
Hot-rolled structural steel to BS EN 10025-2. The "S" is for structural and "275" is its minimum yield strength (275 N/mm² up to 16mm), with 410–560 N/mm² tensile. Carries a dark mill-scale finish and is fully weldable — the correct grade wherever the steel carries load.
Best for: base & gusset plates, bearing plates, structural fabrication, ramps and heavy load-bearing work.
3mm sits on the boundary — we supply it as S275 plate. Both are mill finish (untreated) — paint, prime or galvanise for outdoor use. Grades to BS EN 10130 (CR4/DC01) and BS EN 10025-2 (S275). Heavy plate 12–20mm is stocked in 8×4 and 2m × 1m.
Sheet weight calculator
Steel is heavy — check the weight before it arrives so you can arrange offload.
Calculated for S275 mild steel (density 7.85 g/cm³). Weights are approximate. The 3000 × 1500mm size is stocked in 1.5mm, 3mm and 4mm.
How many sheets do I need?
Covering a floor, wall or surface? We supply full sheets only (no cutting) — enter the area and we'll work out how many whole sheets it takes.
Based on your total area ÷ the sheet area, rounded up to whole sheets (we don't cut to size). Add a margin for offcuts and wastage — long or awkward shapes may need a little more.
Thickness & weight chart
| Thickness | Grade | Weight (kg/m²) | 8×4 sheet | 2m × 1m sheet |
|---|---|---|---|---|
| 0.8mm | CR4 | 6.3 | ~19.6 kg | ~12.6 kg |
| 1.5mm | CR4 | 11.8 | ~36.8 kg | ~23.6 kg |
| 2mm | CR4 | 15.7 | ~49.1 kg | ~31.4 kg |
| 2.5mm | CR4 | 19.6 | ~61.3 kg | ~39.3 kg |
| 3mm | S275 | 23.6 | ~73.6 kg | ~47.1 kg |
| 4mm | S275 | 31.4 | ~98.1 kg | ~62.8 kg |
| 6mm | S275 | 47.1 | ~147.2 kg | ~94.2 kg |
| 8mm | S275 | 62.8 | ~196.3 kg | ~125.6 kg |
| 10mm | S275 | 78.5 | ~245.3 kg | ~157.0 kg |
| 12mm | S275 | 94.2 | ~294.4 kg | ~188.4 kg |
| 15mm | S275 | 117.8 | ~367.9 kg | ~235.5 kg |
| 20mm | S275 | 157.0 | ~490.6 kg | ~314.0 kg |
- Grades: CR4 / DC01 cold-rolled sheet in 0.8–2.5mm (BS EN 10130) & S275 hot-rolled structural plate in 3–20mm (BS EN 10025-2)
- Thicknesses: 0.8, 1, 1.2, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 10, 12, 15 and 20mm
- Sizes: 2500 × 1250mm (8×4ft), 2000 × 1000mm (2m × 1m) & 3000 × 1500mm — supplied as full sheets. Heavy plate 12–20mm in 8×4 & 2m × 1m
- Finish: Mill finish (untreated) — paint, prime or galvanise for outdoor use
- Cutting: Sold as full fixed sheets — not cut to size. Cuts, drills and welds with standard tools
Mild steel vs galvanised vs stainless
Mild steel is the cost-effective structural choice — here's how it compares.
| Feature | Mild Steel S275 | Galvanised | Stainless |
|---|---|---|---|
| Cost | Lowest | Mid | Highest |
| Strength / structural | High | High | High |
| Weldability | Excellent | Good (fumes) | Specialist |
| Corrosion resistance | Low (untreated) | Good | Excellent |
| Best for | Fabrication, base plates, structural | Outdoor / exposed | Hygiene, marine, finish |
Need corrosion resistance? See our galvanised steel sheet range.
Common uses
Our mild steel sheet and plate — also known as steel plate or sheet steel — spans two grades across fifteen thicknesses from 0.8mm to 20mm, in three sheet sizes: 8x4 (2500 x 1250mm), 2m x 1m (2000 x 1000mm) and large-format 3m x 1.5m (3000 x 1500mm). The thin gauges (0.8–2.5mm) are CR4/DC01 cold-rolled sheet; 3mm and thicker are S275 hot-rolled structural plate. Between them they cover everything from light sheet-metal and panel work through to heavy structural plate, with a 3-5 working day lead time to mainland UK addresses.
Sizes Available
Choose your size and thickness above:
8x4 (2500 x 1250mm) — the standard full sheet, in fifteen thicknesses from 0.8mm to 20mm. The go-to size for UK workshop, fabrication and structural work.
2m x 1m (2000 x 1000mm) — the compact sheet, in fifteen thicknesses from 0.8mm to 20mm. Ideal for smaller panels, repairs and jobs where a full 8x4 isn't needed or won't fit.
3m x 1.5m (3000 x 1500mm) — large-format plate in 1.5mm, 3mm and 4mm, for bigger panels and covers that would otherwise need joining.
Steel Grades: CR4 Cold-Rolled Sheet vs S275 Plate
This listing covers two different materials, split by thickness — it matters which one you order.
CR4 / DC01 cold-rolled sheet (0.8–2.5mm) is rolled cold to BS EN 10130. It has a smooth, clean, paint-ready surface with no mill scale, tight thickness tolerances and excellent formability, so it folds and presses without cracking. Low-carbon (0.12% C max), it is a forming grade rather than a structural one — ideal for panels, enclosures, machine guards, ducting, brackets, automotive repair and powder-coated work.
S275 hot-rolled structural plate (3–20mm) is supplied to BS EN 10025-2. The 'S' denotes structural steel and '275' its minimum yield strength of 275 N/mm2 (for thicknesses up to 16mm), with 410–560 N/mm2 tensile strength. It carries a dark mill-scale finish and is fully weldable — the correct grade wherever the steel carries load, such as base and gusset plates, bearing plates and structural fabrication. 3mm sits on the boundary and is supplied as S275 plate.
Technical Specification
| Material | CR4/DC01 cold-rolled sheet (0.8–2.5mm) & S275 hot-rolled structural plate (3–20mm) |
| Standards | BS EN 10130 (CR4/DC01) & BS EN 10025-2 (S275) |
| Minimum yield strength | 275 N/mm2 (S275 plate, up to 16mm) |
| Sheet sizes | 8x4 (2500 x 1250mm), 2m x 1m (2000 x 1000mm), 3m x 1.5m (3000 x 1500mm) |
| Thicknesses available | 0.8mm - 20mm (8x4 & 2m x 1m); 1.5mm, 3mm & 4mm (3m x 1.5m) |
| Density | 7,850 kg/m3 |
| Finish | Mill finish (untreated) — CR4 is smooth/paint-ready, S275 carries mill scale |
| Weldability | Good - suitable for standard MIG/MAG, MMA and TIG welding |
| Machinability | Good - drills, cuts and laser/plasma cuts cleanly |
| Formability | Excellent cold-forming in CR4 gauges; thicker S275 plate suits hot forming |
| Corrosion resistance | Low untreated - paint, prime or galvanise for outdoor use |
| Lead time | 3-5 working days (mainland UK; up to 10 to remote areas) |
Thickness Options and Weights (8x4 sheet)
Approximate full-sheet weights for the 8x4 (2500 x 1250mm) size:
0.8mm - approx 19.63 kg per sheet (CR4)
1mm - approx 24.53 kg per sheet (CR4)
1.2mm - approx 29.44 kg per sheet (CR4)
1.5mm - approx 36.8 kg per sheet (CR4)
2mm - approx 49.06 kg per sheet (CR4)
2.5mm - approx 61.33 kg per sheet (CR4)
3mm - approx 73.59 kg per sheet (S275)
4mm - approx 98.13 kg per sheet (S275)
5mm - approx 122.66 kg per sheet (S275)
6mm - approx 147.19 kg per sheet (S275)
8mm - approx 196.25 kg per sheet (S275)
10mm - approx 245.31 kg per sheet (S275)
12mm - approx 294.38 kg per sheet (S275)
15mm - approx 367.97 kg per sheet (S275)
20mm - approx 490.63 kg per sheet (S275)
The 2m x 1m size runs roughly 64% of these weights for the same thickness, and the 3m x 1.5m plate roughly 1.44x. Popular thicknesses include 1mm, 1.2mm, 2mm and 3mm mild steel sheet for general fabrication and panel work, 3mm and 6mm steel plate for brackets and base plates, and 8mm, 10mm, 12mm, 15mm and 20mm steel plate for heavy structural work. All are supplied as full, flat sheet steel in the size you select above — we do not cut to size.
Common Uses
Mild steel sheet and plate is used across fabrication, construction and general engineering. CR4 cold-rolled sheet suits panels, enclosures, machine guards, brackets, repair plates, infill panels and vehicle work; S275 plate suits base plates, gusset plates, bearing plates and structural fabrication. The 8x4 size is the standard go-to for UK workshop and trade use, the 2m x 1m suits smaller jobs, and the 3m x 1.5m covers large-format panels.
Workability
Mild steel sheet and plate can be cut, drilled, bent, welded and fabricated using standard steelwork methods. It is suitable for painting, priming or galvanising after fabrication where corrosion protection is required. Thicker plate requires heavier-duty cutting and handling equipment.
Mild Steel Sheet and Plate vs Other Materials
Mild steel offers strength and weldability at low cost, making it the standard choice for structural and fabrication work. Where corrosion resistance is the priority, galvanised steel sheet or stainless steel may be more suitable. Aluminium is lighter but weaker and is not a like-for-like substitute for structural applications.
Delivery Information
Lead times are currently 3-5 working days for mainland UK, with a maximum of 10 working days to remote areas. Mainland UK delivery only. Sheets are heavy items - please ensure suitable access is available for delivery at your site.
Bulk Orders
Contact us for a custom quote if you require multiple mild steel sheets or larger quantities for a fabrication, construction or trade project.