304 Stainless Steel Blank Round Disc — Metal Plate Ø18–80mm, 1–5mm Thick

Match the outer diameter to the hole, flange, or surface you need to cover or fit. For thickness, thinner discs (1–1.5mm) are generally used for lightweight covers, gaskets, or decorative blanks, while thicker discs (2–5mm) are typically chosen for structural, load-bearing, or high-wear applications. For example, a 25mm (≈1") diameter disc at 2mm thick is a common choice for small mechanical blanks. When in doubt, go one size thicker — you can always remove material, but you can't add it back.

304 stainless steel typically has a tensile strength of around 515 MPa (75,000 psi) and a yield strength of approximately 205 MPa (30,000 psi). Actual load capacity in your application depends on disc diameter, thickness, support conditions, and how the disc is fastened. For critical structural applications, consult an engineer to verify suitability.

304 stainless steel generally performs well in rain, humidity, and mild atmospheric outdoor exposure. It is not recommended for direct or prolonged saltwater immersion — for coastal or marine applications with heavy chloride exposure, 316 stainless steel is typically the better choice. For light outdoor use such as garden fixtures, outdoor signage, or covered installations, 304 grade is generally adequate.

No — these are completely blank, undrilled, unthreaded flat discs. They are compatible with any metric or imperial fastener standard once you drill or tap them yourself. This blank format gives you full flexibility to customize the disc for your specific application.

Yes. 304 stainless steel is weldable using TIG, MIG, or spot welding. It is also fully machinable — you can drill, tap, cut, grind, or bend these discs with appropriate stainless-rated tooling. Use carbide-tipped drill bits and cutting fluids for clean results. Avoid using carbon steel tools that may leave embedded particles and cause surface rust.

Order 1–2 pcs for prototyping, single repairs, or one-off custom projects. Order 5–10 pcs if you're working on a batch fabrication job, want spares on hand, or want to reduce the per-unit cost. Larger quantity options are generally priced more economically per piece.

These discs typically have a mill or brushed finish consistent with standard 304 stainless steel sheet stock. Edges from the blanking process may have minor burrs — light deburring with a file or deburring tool is recommended before use in precision-fit or safety-critical applications. Contact us to confirm the finish for your specific size if this is important to your project.

Common applications include pipe and tube end caps, flange blanks, custom gasket substrates, metal stamping and engraving blanks, decorative medallions, structural spacer plates, DIY metal art, and prototyping. The 304 alloy is also used in food processing and kitchen fabrication contexts where hygiene and corrosion resistance are important.