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When your project demands a flat, dimensionally consistent metal panel that won't flex under load or warp during welding, sourcing the right mild steel sheet metal square plate is half the battle. Whether you're a fabricator building structural brackets, a maker reinforcing a frame, or a tradesperson patching worn surfaces, inconsistent off-cuts waste time and money. These precision-cut mild steel square plates give you a reliable starting point every time.
Each plate is cut from low-carbon mild steel (typically equivalent to S235/A36 grade), offering a balanced combination of workability and tensile strength. Sizes range from 50 mm × 50 mm up to 200 mm × 100 mm (approximately 2" × 2" up to 7.9" × 3.9"), with thickness options spanning 0.6 mm to 10 mm (roughly 0.024" to 0.394"). Plates are supplied in multi-pack quantities — 1, 2, 4, or 8 pieces — depending on the size and thickness selected.
These mild steel sheet metal panels suit a wide range of applications: welding practice and fabrication jigs, DIY shelf brackets and furniture reinforcement plates, automotive bodywork repair patches, and general engineering repair work where a flat mild steel blank is required. Long-tail use cases include mild steel shim plates for machinery levelling, steel backing plates for bolt-through fixings, and flat bar stock substitutes for light structural work.
| Material | Low-carbon mild steel (S235 / A36 equivalent) |
|---|---|
| Shape | Square / rectangular flat plate |
| Available Sizes (L × W) | 50×50 mm, 100×50 mm, 100×100 mm, 200×100 mm |
| Thickness Range | 0.6 mm – 10 mm (0.024" – 0.394") |
| Pack Quantity | See variant options |
| Surface Finish | Mill scale (hot-rolled appearance) |
| Weldability | MIG, TIG, Stick (SMAW) |
| Machinability | Suitable for drilling, cutting, bending, grinding |
| Corrosion Resistance | Bare steel — surface treatment recommended for outdoor use |
| Weight per Piece | See variant options |
For light sheet metal work, patching, or decorative applications, 0.6 mm–1 mm is typically sufficient. For structural brackets, reinforcement plates, or load-bearing fixtures, 2 mm–6 mm is more appropriate. Thicknesses of 8 mm–10 mm suit heavy-duty engineering or machinery applications where rigidity is critical. If in doubt, select one step thicker than your minimum requirement.
These plates are cut from low-carbon mild steel equivalent to S235 (EN standard) or A36 (ASTM standard). This grade offers a tensile strength of approximately 400–550 MPa and is one of the most widely used structural steels, balancing strength, ductility, and ease of fabrication.
Yes — mild steel is not inherently corrosion-resistant. For indoor or dry environments, the mill-scale surface provides limited short-term protection. For outdoor, humid, or marine environments, we recommend applying a rust-inhibiting primer followed by a topcoat, or using a cold galvanising compound. Powder coating or epoxy paint also provides durable long-term protection.
Yes, mild steel is one of the most weldable metals available. For best results with MIG or TIG welding, lightly grind or wire-brush the mill-scale from the weld zone to improve arc stability and reduce porosity. Stick (SMAW) welding can typically be performed directly on mill-scale surfaces with appropriate electrode selection.
Yes. Thinner plates (0.6 mm–2 mm) can be cut with tin snips, angle grinders, or jigsaws fitted with bi-metal blades. Thicker plates (3 mm and above) are best cut with an angle grinder using a cutting disc, a cold saw, or a plasma cutter. Drilling is straightforward with HSS or cobalt drill bits and cutting fluid.
Use the Size (Length × Width × Thick) dropdown to select your required plate dimensions and thickness. The Amount (pcs) dropdown then shows the available pack quantities for that size — typically 1, 2, 4, or 8 pieces. Larger and thicker plates are supplied in smaller pack quantities due to weight. Select the combination that matches your project needs and budget.
Yes. The thinner variants (0.6 mm–2 mm) are well-suited for use as shim plates under machinery feet, levelling pads, or spacer plates in fabrication assemblies. The consistent thickness tolerance of shear-cut mild steel makes them reliable for shimming applications where precise gap control is needed.
