Grade 316 Stainless Steel Blank Discs — Laser-Cut Round Plates for Precision DIY & Fabrication
When a project demands a flat, true-round metal blank that holds up to moisture, chemicals, or outdoor exposure, standard mild steel falls short. Hobbyists, fabricators, and tradespeople working on marine fittings, architectural features, or custom brackets need a disc that arrives ready to use — no deburring surprises, no warped edges. These Grade 316 stainless steel blank discs are laser-cut to consistent dimensions so you can drill, weld, or finish them straight out of the pack.
Each disc is cut from Grade 316 (A4) stainless steel sheet — an austenitic alloy with added molybdenum for enhanced chloride resistance. Diameters run from 50 mm (approx. 2 in) to 300 mm (approx. 11.8 in); thickness options span 0.5 mm to 10 mm. Packs are available in 1, 2, or 5 pieces depending on the size selected, letting you order exactly what the job requires.
Typical applications include marine deck hardware and port covers, custom flanges and backing plates for plumbing or HVAC, decorative wall art and signage blanks, and jig or fixture plates in workshop environments where rust contamination must be avoided.
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Compatibility: Suitable for MIG/TIG welding with 316L filler wire, standard HSS or cobalt drill bits, and angle grinder finishing discs. Compatible with most laser engraving setups for marking.
✅ Key Features of These Grade 316 Stainless Steel Blank Discs
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🔵Molybdenum-enhanced corrosion resistance — Grade 316 alloy withstands salt spray, mild acids, and chloride environments that would pit standard 304 grade steel.
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✂️Laser-cut edges — CNC laser cutting produces a clean, consistent edge profile with minimal burr, reducing prep time before drilling or welding.
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📐Wide size matrix — Six diameters (50–300 mm) combined with eleven thickness options (0.5–10 mm) give you 66 distinct variants to match exact project tolerances.
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📦Flexible pack quantities — Order 1, 2, or 5 pieces per variant so you avoid over-buying on one-off repairs or can stock up for batch production runs.
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⚙️Weld and machine ready — Mill-finish surface is free of coatings or plating, making it immediately compatible with TIG/MIG welding, tapping, and surface grinding.
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🏗️Structural and decorative versatility — Flat, true-round geometry suits load-bearing backing plates, decorative medallions, custom gaskets, and prototype flanges alike.
📐 Technical Specifications — Stainless Steel Round Disc
| Material Grade |
316 (A4) Austenitic Stainless Steel |
| Alloying Elements |
Iron, Chromium (~16–18%), Nickel (~10–14%), Molybdenum (~2–3%) |
| Shape |
Round / Circular Disc (Blank) |
| Diameter Options |
50 mm, 80 mm, 100 mm, 150 mm, 200 mm, 300 mm |
| Thickness Options |
0.5 mm, 1 mm, 1.2 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm |
| Surface Finish |
Mill finish (uncoated, unpolished) |
| Edge Type |
Laser-cut, low-burr |
| Pack Quantity |
See variant options (1, 2, or 5 Pcs) |
| Weldability |
TIG / MIG compatible; use 316L filler wire |
| Magnetism |
Non-magnetic (austenitic structure) |
| Weight per Piece |
See variant options (varies by diameter and thickness) |
❓ Frequently Asked Questions
What is the difference between Grade 304 and Grade 316 stainless steel discs?
Grade 316 contains 2–3% molybdenum, which significantly improves resistance to chloride pitting and crevice corrosion compared to Grade 304. If your application involves salt water, coastal environments, swimming pools, or chemical exposure, Grade 316 is the appropriate choice. For purely indoor or dry applications, 304 may suffice, but 316 provides a wider safety margin.
How do I choose the right diameter and thickness for my project?
Diameter should match or slightly exceed the hole or recess you need to cover or reinforce. Thickness is determined by the load or structural requirement: 0.5–1.5 mm is suitable for decorative or light-duty applications; 2–4 mm handles moderate structural loads; 5–10 mm is appropriate for heavy flanges, backing plates, or load-bearing fixtures. When in doubt, select one thickness step up from your minimum calculated requirement.
Can these discs be welded, and what filler wire should I use?
Yes. These discs are weld-ready in their mill-finish state. For TIG or MIG welding, use a 316L (low-carbon) stainless filler wire to match the base metal and minimise carbide precipitation at the weld zone. Clean the surface with acetone or a dedicated stainless cleaner before welding to remove any handling oils.
Are the edges safe to handle straight from the pack?
Laser cutting produces a cleaner edge than saw or punch cutting, with minimal burr. However, thicker discs (3 mm and above) may have a slightly sharp laser-cut edge. We recommend wearing cut-resistant gloves when handling discs 3 mm or thicker, and running a fine file or deburring tool around the edge if bare-hand contact is frequent in your application.
Will Grade 316 stainless steel rust or stain over time?
Grade 316 is highly corrosion-resistant but not entirely immune. In prolonged contact with strong chlorides (e.g., undiluted bleach or stagnant salt water pooling on the surface), surface staining or very slow pitting can occur over years. Regular rinsing with fresh water and occasional cleaning with a non-abrasive stainless cleaner will maintain appearance and performance in most environments.
Can I laser engrave or etch these discs for custom signage or tags?
Yes. The mill-finish surface is compatible with fibre laser engraving, which produces a permanent, high-contrast mark without removing material. For CO₂ laser systems, a laser-marking spray (such as Cermark or Brilliance) applied to the surface before engraving will produce a durable black mark. Chemical etching with ferric chloride is also an option for hobbyist setups.
What pack size should I order for a single repair versus a production run?
For a one-off repair or prototype, the 1 Pcs option keeps cost and waste minimal. If you are making a small batch of identical parts (e.g., 4–8 pieces), the 2 Pcs or 5 Pcs packs typically offer a lower per-unit cost. For ongoing production, ordering multiple 5 Pcs packs is more economical than repeated single-piece orders.
🛒 Select your Diameter, Thickness, and Amount above, then add to cart.
