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When a project demands a flat, corrosion-resistant disc that holds its shape under load, most hardware-store sheet offcuts simply don't deliver the dimensional accuracy or surface consistency that DIYers, welders, and light fabricators need. These 304 A2 stainless steel round plates are stocked in multiple diameters and thicknesses so you can match the exact spec without cutting, grinding, or wasting material.
Each plate is produced from Grade 304 (A2) austenitic stainless steel — the same alloy used in food-processing equipment and architectural trim — and is available in diameters from Ø100 mm (~3.94 in) to Ø300 mm (~11.81 in) and thicknesses from 1 mm (~0.039 in) to 3 mm (~0.118 in). Edges are clean-cut and faces are mill-finished, ready for further machining, welding, or direct installation.
Typical applications include custom base plates for furniture legs and table frames, backing flanges for pipe penetrations, decorative wall medallions, and blanks for CNC or lathe turning projects. Whether you're sourcing a stainless steel round disc for a DIY shelf bracket or a replacement flange plate for light industrial equipment, the range of sizes covers most common requirements.
Contains 18% chromium and 8% nickel for reliable oxidation resistance in indoor, outdoor, and mildly corrosive environments — without the cost of marine-grade 316.
Diameters from Ø100 mm to Ø300 mm and thicknesses from 1 mm to 3 mm let you select the exact blank size, reducing waste and secondary cutting time.
Plates are cut to a circular profile with consistent edge geometry, making them ready for immediate use or further finishing without deburring the entire perimeter.
304 stainless is fully compatible with TIG and MIG welding processes and can be drilled, tapped, or turned on a lathe using standard HSS or carbide tooling.
Even the 1 mm plates maintain flatness across the disc face, while the 2–3 mm options provide load-bearing stiffness suitable for base plates and mounting flanges.
Available in 1-piece or 2-piece packs so you can order exactly what your project requires — whether it's a single prototype or a small production run.
| Material | 304 Austenitic Stainless Steel (A2) |
|---|---|
| Shape | Round / Disc |
| Diameter Range | Ø100 mm – Ø300 mm (3.94 in – 11.81 in) |
| Thickness Range | 1 mm – 3 mm (0.039 in – 0.118 in) |
| Surface Finish | Mill finish (2B or equivalent) |
| Chromium Content | Typically 17.5–19.5% |
| Nickel Content | Typically 8–10.5% |
| Tensile Strength | Typically 515–720 MPa |
| Diameter | See variant options |
| Thickness | See variant options |
| Pack Quantity | See variant options |
| Weight per Piece | See variant options |
For decorative or lightweight applications such as wall medallions or thin backing plates, 1–1.5 mm is typically sufficient. For structural uses like furniture base plates or mounting flanges that bear load, 2–3 mm provides the rigidity needed. If you're unsure, measure the thickness of the existing component you're replacing or consult a load table for your specific span and load.
Grade 304 stainless steel forms a passive chromium-oxide layer that resists rust in most outdoor environments. However, in coastal or high-chloride settings (salt spray, pool surrounds), Grade 316 is the recommended choice. For standard outdoor DIY use away from the coast, 304 performs reliably without surface treatment.
Yes. 304 stainless can be TIG or MIG welded to other 304/316 stainless parts using ER308L filler wire. Welding to mild steel is possible but requires a compatible filler (e.g., ER309L) and may affect corrosion resistance at the weld zone. Always clean the weld area and passivate after welding for best results.
Order the next size up from your finished dimension to allow for turning or grinding stock. For example, if your finished disc needs to be Ø95 mm, order the Ø100 mm plate and turn it down on a lathe. This ensures you have enough material to achieve a clean, concentric finished edge.
Yes. Because the plates are Grade 304 (A2), they are fully compatible with A2 stainless bolts, screws, and nuts. Using matched-grade fasteners prevents galvanic corrosion at the joint. A4 (316) fasteners can also be used without compatibility issues.
The 2-piece pack is available for the Ø100 mm diameter and offers a lower per-unit cost when you need a spare or are building symmetrical assemblies (e.g., two matching base pads). For larger diameters (Ø150 mm and above), only the 1-piece option is listed — order multiple quantities at checkout if you need more than one.
Yes. The mill-finish surface is suitable as a starting blank for fiber laser engraving and plasma or waterjet cutting. For laser engraving, the 1–1.5 mm plates are easiest to handle. For plasma cutting custom shapes from the disc, the 2–3 mm thickness gives better edge quality and reduces warping from heat input.
Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
US$40
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