304 Stainless Steel Foil Sheet — Precision Thin Steel Plate for DIY & Fabrication
When a project demands exact material thickness and reliable corrosion resistance, standard sheet metal often falls short. Machinists, fabricators, and hands-on DIYers who need ultra-thin 304 stainless steel foil sheet in controlled dimensions know how difficult it is to source the right gauge without ordering bulk quantities or accepting inconsistent tolerances.
Each sheet is 304-grade stainless steel — an austenitic alloy with a chromium-nickel composition that delivers strong oxidation resistance and structural integrity across a wide temperature range. Sheets measure 300mm × 1000mm (approx. 11.8" × 39.4") with thickness options spanning 0.05mm to 0.8mm (approximately 0.002" to 0.031"). The foil surface is smooth-rolled with consistent gauge throughout.
Typical applications include shim stock for machinery alignment, gasket blanks for plumbing and HVAC assemblies, heat shields in automotive or appliance repair, and precision spacers in electronics enclosures. The 300×1000mm format is well-suited for cutting custom shim strips, wrapping cylindrical components, or laminating into multi-layer assemblies.
🔧 Compatible with standard metal snips, laser cutters, waterjet cutters, and bench shears. Suitable for use in environments exposed to moisture, mild acids, and elevated temperatures up to approximately 870°C (1600°F) intermittently.
✅ Key Features of These 304 Stainless Steel Foil Sheets
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📏 Wide thickness range: Available from 0.05mm to 0.8mm (0.002"–0.031") — select the exact gauge your application requires without over-ordering.
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🛡️ 304-grade corrosion resistance: The 18% chromium / 8% nickel composition resists rust, oxidation, and mild chemical exposure, making these sheets suitable for damp or outdoor-adjacent environments.
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📐 Consistent 300×1000mm format: Each sheet arrives at a uniform 300mm × 1000mm (11.8" × 39.4") — easy to cut down to shim strips, gasket blanks, or custom shapes with standard tooling.
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⚙️ Smooth-rolled surface finish: The flat, burr-free surface ensures accurate stack-up measurements when used as shim stock or spacer material in precision assemblies.
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🔥 Temperature-stable alloy: Retains mechanical properties across a broad service range, suitable for heat shields, exhaust wraps, and appliance repair applications.
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✂️ Machinable and formable: Can be cut with metal snips, scored and bent, laser-cut, or waterjet-cut — no special tooling required for thinner gauges (0.05–0.2mm).
📐 Technical Specifications — Stainless Steel Foil Sheet
| Material |
304 Stainless Steel (18/8 Cr-Ni alloy) |
| Sheet Width |
300mm (approx. 11.8") |
| Sheet Length |
1000mm (approx. 39.4") |
| Thickness Options |
0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.8mm |
| Surface Finish |
Smooth-rolled (2B-style) |
| Tensile Strength |
Typically 515–720 MPa (see variant options for grade confirmation) |
| Max Continuous Service Temp. |
Approx. 870°C (1600°F) |
| Pack Quantity |
1 Pcs per order (multi-pack: see variant options) |
| Corrosion Resistance |
Excellent — resists moisture, mild acids, and oxidation |
| Magnetism |
Slightly magnetic (work-hardened 304 may exhibit weak magnetism) |
❓ Frequently Asked Questions
How do I choose the right thickness for my project?
For shim stock and precision spacers, 0.05mm–0.1mm is typical. For gasket blanks or heat shields that need to hold shape under moderate pressure, 0.2mm–0.5mm is more appropriate. For structural spacers or wear plates, 0.8mm provides greater rigidity. If you are unsure, measure the gap you need to fill and select the closest available thickness.
Is 304 stainless steel strong enough for load-bearing shim applications?
304 stainless steel has a tensile strength of approximately 515–720 MPa, which is adequate for most shim and spacer applications under compressive loads. It is not intended for high-cycle fatigue or impact-loaded structural roles. For those applications, 316 or 17-4 PH grades are more appropriate.
Will these sheets rust or corrode outdoors?
304 stainless steel resists rust and oxidation well in most outdoor environments. However, prolonged exposure to chloride-rich environments (such as coastal salt air or de-icing salts) can cause surface pitting over time. For marine or high-chloride environments, 316 stainless steel is the recommended alternative.
Can I cut these sheets with standard tools?
Yes. Thinner gauges (0.05mm–0.2mm) can be cut cleanly with sharp metal snips, a utility knife and straightedge, or a rotary cutter on a hard surface. Thicker gauges (0.3mm–0.8mm) are best cut with aviation snips, a bench shear, or a laser/waterjet cutter for precision edges. Always deburr cut edges before handling.
Are these sheets compatible with welding or soldering?
304 stainless steel is weldable using TIG, MIG, or spot welding processes with appropriate filler wire (ER308L is standard). Soldering is possible with stainless-compatible flux, though adhesion is weaker than welding. Very thin gauges (0.05mm–0.1mm) require careful heat control to avoid warping.
What is the difference between this foil sheet and standard stainless steel sheet metal?
"Foil" or "shim stock" refers to very thin gauges (typically under 1mm) that are precision-rolled to tight thickness tolerances. Standard sheet metal is usually 1mm and above and is intended for structural or cladding use. These foil sheets are optimized for applications where exact thickness matters — shimming, gasketing, and precision spacers — rather than structural strength.
How do I confirm which thickness variant I need before ordering?
Use a digital micrometer to measure the gap or clearance you need to fill. Match that measurement to the closest available thickness option in the variant selector above. If your required thickness falls between two options, select the thinner one and stack sheets as needed, or contact us to confirm availability of intermediate gauges.
🛒 Select your Thickness X Width X Length and Pack Quantity above, then add to cart.
