10-60mm 304 Stainless Steel Plate Round Circle Disc Blank 20-200mm OD CNC Turned

Start with the load-bearing or clearance requirements of your application. Thickness determines the axial depth of the part — for spacers and standoffs, match thickness to the gap you need to fill. Outer diameter should be selected based on the bolt circle, bore size, or mating surface of the assembly. If you are using the disc as a blank for further machining, add at least 1–2 mm of stock on the OD to allow for finishing cuts.

304 stainless has a typical tensile strength of approximately 515 MPa and yield strength of approximately 205 MPa, which is adequate for many light-to-medium structural uses such as brackets, flanges, and mounting plates. For high-stress or high-temperature structural applications, consider 316 or 17-4 PH grades. If you are unsure, consult a structural engineer for your specific load case.

304 stainless steel resists rust in most outdoor environments due to its passive chromium oxide layer. However, in coastal or high-chloride environments (salt spray, de-icing salts), surface staining or pitting can occur over time. For marine or chloride-heavy environments, 316 stainless is a more appropriate choice. Periodic cleaning with a mild detergent helps maintain the passive layer.

Yes. 304 stainless can be TIG or MIG welded to itself and to mild steel using appropriate filler metals (e.g., ER308L for stainless-to-stainless, or ER309L for stainless-to-mild-steel dissimilar joints). The turned surface is free of mill scale, so no grinding prep is required in most cases. Post-weld passivation is recommended to restore corrosion resistance in the heat-affected zone.

304 stainless steel is widely used in food processing equipment and is generally considered food-safe when properly finished and cleaned. However, these discs are supplied as machined blanks and have not been certified or tested for specific food-contact or medical-device standards (e.g., FDA, ISO 13485). If your application requires certified material or specific surface finish standards, please contact us to confirm before ordering.

These CNC-turned discs are suitable for a wide range of secondary operations including drilling, tapping, milling, boring, grinding, laser engraving, and further turning. The turned surface provides a consistent datum for fixturing. Use carbide tooling and stainless-compatible cutting fluid for best results. Avoid work-hardening by maintaining consistent feed rates and avoiding rubbing cuts.

Quantity options (1, 2, 3, 4, 5, or 10 pieces) are available for most size combinations. For prototyping or one-off repairs, a single piece is sufficient. For small-batch production runs or assemblies requiring matched sets, ordering 5 or 10 pieces typically reduces per-unit cost. Check the variant price displayed for each quantity to compare the per-piece rate before adding to cart.