A2 Stainless Steel Blank Round Discs — Precision Laser Cut, 304 Grade, Ready to Use
When a project demands a flat, burr-free metal blank that fits exactly where you need it, sourcing the wrong grade or an imprecise cut wastes time and money. Fabricators, engineers, hobbyists, and makers who work with sheet metal regularly know how frustrating it is to receive discs with rough edges, inconsistent thickness, or a grade that corrodes the moment it meets moisture. These A2 stainless steel blank round discs are laser cut to tight tolerances so you can skip the secondary finishing step and move straight to your application.
Each disc is cut from 304-grade (A2) stainless steel sheet, offering a balanced combination of corrosion resistance, weldability, and formability. Available diameters run from 6 mm (approx. 0.24 in) up to 80 mm (approx. 3.15 in), with wall thicknesses spanning 1 mm through 5 mm (approx. 0.04–0.20 in). Pack sizes range from 1 to 100 pieces per order so you can match quantity to your actual job requirement.
Typical use cases include gasket blanks and sealing washers in plumbing and HVAC assemblies, decorative inlays and craft medallions for signage or jewellery work, and structural spacer discs in mechanical or automotive fabrication. The clean laser-cut edge also makes these discs well-suited as weld-on backing plates or as raw stock for further machining on a lathe or mill.
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Compatibility note: 304 / A2 stainless steel is non-magnetic in its annealed state and is not suitable for applications requiring magnetic attraction. For marine or high-chloride environments, consider 316 / A4 grade instead.
✅ Key Features of These A2 Stainless Steel Blank Round Discs
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304 / A2 Grade Stainless Steel
Alloy composition of approximately 18% chromium and 8% nickel delivers reliable corrosion resistance in indoor, outdoor, and mildly humid environments without surface treatment.
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Precision Laser Cut Edges
CNC laser cutting produces a clean, consistent edge profile across every disc. No burrs, no hand-filing required — the disc is ready to use or weld straight from the pack.
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Wide Diameter Range: 6–80 mm
Over 200 size combinations covering diameters from 6 mm to 80 mm and thicknesses from 1 mm to 5 mm let you match the disc to the exact dimensional requirement of your project.
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Flexible Pack Quantities
Order as few as 1 disc or as many as 100 per pack. Smaller packs suit prototyping and repair work; larger packs reduce per-unit cost for production runs.
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Weldable and Machinable
304 stainless accepts MIG, TIG, and spot welding without significant sensitisation at standard weld parameters. The flat, square-edged blank also machines cleanly on a lathe or mill.
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Consistent Thickness Tolerance
Sheet stock is sourced to standard EN 10088 thickness tolerances, so each disc in a pack measures within the stated thickness — critical for stacked assemblies and gasketed joints.
📐 Technical Specifications — Stainless Steel Round Discs
| Material Grade |
304 Stainless Steel (A2) |
| Shape |
Circular / Round Disc (Blank) |
| Diameter Range |
6 mm – 80 mm (approx. 0.24 in – 3.15 in) |
| Thickness Range |
1 mm – 5 mm (approx. 0.04 in – 0.20 in) |
| Cut Method |
Precision CNC Laser Cut |
| Edge Condition |
Clean laser-cut edge, no secondary deburring required |
| Surface Finish |
Mill finish (2B or equivalent) |
| Chromium Content |
Typically 17.5–19.5% |
| Nickel Content |
Typically 8–10.5% |
| Magnetic Properties |
Non-magnetic (annealed condition) |
| Pack Quantity Options |
1, 2, 5, 10, 20, 50, 100 pieces |
| Diameter x Thickness |
See variant options |
| Weight per Disc |
See variant options |
❓ Frequently Asked Questions
How do I choose the right diameter and thickness for my project?
Start with the bore or recess your disc needs to cover or fit into, then add any overlap required for sealing or structural support. Thickness should match the load or pressure the disc will experience — thinner discs (1–1.5 mm) suit light-duty gaskets and decorative work, while 3–5 mm discs handle structural spacer and backing-plate applications. If you are unsure, contact us to confirm before ordering.
Is 304 stainless steel strong enough for structural use?
304 stainless steel has a typical tensile strength of around 515 MPa and a yield strength of approximately 205 MPa, which is adequate for many light-to-medium structural applications such as spacers, backing plates, and brackets. For high-stress or load-bearing structural components, consult an engineer to confirm the grade and thickness are appropriate for your specific load case.
Will these discs rust or corrode outdoors?
304 / A2 stainless steel provides good corrosion resistance in most outdoor environments, including rain and moderate humidity. However, it can show surface staining in coastal or high-chloride environments over time. For prolonged marine or salt-spray exposure, 316 / A4 grade is a more suitable choice. Keeping the surface clean and dry extends service life in borderline conditions.
Are the discs compatible with welding?
Yes. 304 stainless steel is readily weldable using TIG, MIG, and resistance (spot) welding processes. Use 308L filler wire for TIG/MIG to maintain corrosion resistance at the weld zone. Avoid prolonged heat input in the 425–860 °C sensitisation range if the welded assembly will be exposed to corrosive media; post-weld pickling or passivation can restore the passive layer if needed.
Can I machine or drill these discs after purchase?
Yes. 304 stainless machines cleanly on a lathe or mill with sharp carbide tooling and appropriate cutting fluid. Use lower speeds and higher feed rates compared to mild steel to avoid work-hardening the surface. Standard HSS or cobalt drill bits work for drilling, though carbide-tipped bits extend tool life on thicker discs (3 mm and above).
What pack size should I order for a one-off repair versus a production run?
For a single repair or prototype, the 1- or 2-piece pack keeps cost low and avoids leftover stock. For small batch production (10–50 assemblies), the 20- or 50-piece packs offer a lower per-unit price. The 100-piece pack is most economical for ongoing production runs where you need consistent stock on hand. Pack sizes are listed alongside each diameter × thickness combination in the variant selector above.
How accurate is the laser cut — what tolerances should I expect?
CNC laser cutting typically achieves a dimensional tolerance of ±0.1–0.2 mm on diameter for sheet thicknesses up to 3 mm, and ±0.2–0.3 mm for thicker stock (4–5 mm). Edge squareness is generally within 0.5° of perpendicular. If your application requires tighter tolerances, contact us before ordering so we can confirm whether the current cutting specification meets your needs.
🛒 Select your Diameter x Thickness and Pack of Quantity above, then add to cart.
